feat: wip attach attachments to resource models

packages/server/src/api/controllers/Expenses/Expenses.ts

@@ -84,7 +84,7 @@ export class ExpensesController extends BaseController {
   /**
    * Expense DTO schema.
    */
-  get expenseDTOSchema() {
+  private get expenseDTOSchema() {
     return [
       check('reference_no')
         .optional({ nullable: true })
@@ -130,6 +130,9 @@ export class ExpensesController extends BaseController {
         .optional({ nullable: true })
         .isInt({ max: DATATYPES_LENGTH.INT_10 })
         .toInt(),
+
+      check('attachments').isArray().optional(),
+      check('attachments.*.key').exists().isString(),
     ];
   }
 
@@ -183,6 +186,9 @@ export class ExpensesController extends BaseController {
         .optional({ nullable: true })
         .isInt({ max: DATATYPES_LENGTH.INT_10 })
         .toInt(),
+
+      check('attachments').isArray().optional(),
+      check('attachments.*.key').exists().isString(),
     ];
   }
 
@@ -269,7 +275,7 @@ export class ExpensesController extends BaseController {
    * @param {Response} res
    * @param {NextFunction} next
    */
-  async deleteExpense(req: Request, res: Response, next: NextFunction) {
+  private async deleteExpense(req: Request, res: Response, next: NextFunction) {
     const { tenantId, user } = req;
     const { id: expenseId } = req.params;
 
@@ -291,7 +297,11 @@ export class ExpensesController extends BaseController {
    * @param {Response} res
    * @param {NextFunction} next
    */
-  async publishExpense(req: Request, res: Response, next: NextFunction) {
+  private async publishExpense(
+    req: Request,
+    res: Response,
+    next: NextFunction
+  ) {
     const { tenantId, user } = req;
     const { id: expenseId } = req.params;
 
@@ -313,7 +323,11 @@ export class ExpensesController extends BaseController {
    * @param {Response} res
    * @param {NextFunction} next
    */
-  async getExpensesList(req: Request, res: Response, next: NextFunction) {
+  private async getExpensesList(
+    req: Request,
+    res: Response,
+    next: NextFunction
+  ) {
     const { tenantId } = req;
     const filter = {
       sortOrder: 'desc',
@@ -343,7 +357,7 @@ export class ExpensesController extends BaseController {
    * @param {Response} res
    * @param {NextFunction} next
    */
-  async getExpense(req: Request, res: Response, next: NextFunction) {
+  private async getExpense(req: Request, res: Response, next: NextFunction) {
     const { tenantId } = req;
     const { id: expenseId } = req.params;
 

packages/server/src/api/controllers/ManualJournals.ts

@@ -148,6 +148,9 @@ export default class ManualJournalsController extends BaseController {
         .optional({ nullable: true })
         .isNumeric()
         .toInt(),
+
+      check('attachments').isArray().optional(),
+      check('attachments.*.key').exists().isString(),
     ];
   }
 

packages/server/src/api/controllers/Purchases/Bills.ts

@@ -118,7 +118,6 @@ export default class BillsController extends BaseController {
       check('is_inclusive_tax').default(false).isBoolean().toBoolean(),
 
       check('entries').isArray({ min: 1 }),
-
       check('entries.*.index').exists().isNumeric().toInt(),
       check('entries.*.item_id').exists().isNumeric().toInt(),
       check('entries.*.rate').exists().isNumeric().toFloat(),
@@ -148,6 +147,9 @@ export default class BillsController extends BaseController {
         .optional({ nullable: true })
         .isNumeric()
         .toInt(),
+
+      check('attachments').isArray().optional(),
+      check('attachments.*.key').exists().isString(),
     ];
   }
 
@@ -190,6 +192,9 @@ export default class BillsController extends BaseController {
         .optional({ nullable: true })
         .isBoolean()
         .toBoolean(),
+
+      check('attachments').isArray().optional(),
+      check('attachments.*.key').exists().isString(),
     ];
   }
 

packages/server/src/api/controllers/Purchases/BillsPayments.ts

@@ -122,6 +122,9 @@ export default class BillsPayments extends BaseController {
       check('entries.*.index').optional().isNumeric().toInt(),
       check('entries.*.bill_id').exists().isNumeric().toInt(),
       check('entries.*.payment_amount').exists().isNumeric().toFloat(),
+
+      check('attachments').isArray().optional(),
+      check('attachments.*.key').exists().isString(),
     ];
   }
 

packages/server/src/api/controllers/Purchases/VendorCredit.ts

@@ -186,6 +186,9 @@ export default class VendorCreditController extends BaseController {
         .optional({ nullable: true })
         .isNumeric()
         .toInt(),
+
+      check('attachments').isArray().optional(),
+      check('attachments.*.key').exists().isString(),
     ];
   }
 
@@ -228,6 +231,9 @@ export default class VendorCreditController extends BaseController {
         .optional({ nullable: true })
         .isNumeric()
         .toInt(),
+
+      check('attachments').isArray().optional(),
+      check('attachments.*.key').exists().isString(),
     ];
   }
 

packages/server/src/api/controllers/Sales/CreditNotes.ts

@@ -236,6 +236,9 @@ export default class PaymentReceivesController extends BaseController {
         .optional({ nullable: true })
         .isNumeric()
         .toInt(),
+
+      check('attachments').isArray().optional(),
+      check('attachments.*.key').exists().isString(),
     ];
   }
 

packages/server/src/api/controllers/Sales/PaymentReceives.ts

@@ -164,6 +164,9 @@ export default class PaymentReceivesController extends BaseController {
       check('entries.*.index').optional().isNumeric().toInt(),
       check('entries.*.invoice_id').exists().isNumeric().toInt(),
       check('entries.*.payment_amount').exists().isNumeric().toFloat(),
+
+      check('attachments').isArray().optional(),
+      check('attachments.*.key').exists().isString(),
     ];
   }
 

packages/server/src/api/controllers/Sales/SalesEstimates.ts

@@ -184,6 +184,9 @@ export default class SalesEstimatesController extends BaseController {
       check('note').optional().trim().escape(),
       check('terms_conditions').optional().trim().escape(),
       check('send_to_email').optional().trim().escape(),
+
+      check('attachments').isArray().optional(),
+      check('attachments.*.key').exists().isString(),
     ];
   }
 

packages/server/src/api/controllers/Sales/SalesInvoices.ts

@@ -36,6 +36,8 @@ export default class SaleInvoicesController extends BaseController {
       [
         ...this.saleInvoiceValidationSchema,
         check('from_estimate_id').optional().isNumeric().toInt(),
+        check('attachments').isArray().optional(),
+        check('attachments.*.key').exists().isString(),
       ],
       this.validationResult,
       asyncMiddleware(this.newSaleInvoice.bind(this)),
@@ -98,6 +100,8 @@ export default class SaleInvoicesController extends BaseController {
       [
         ...this.saleInvoiceValidationSchema,
         ...this.specificSaleInvoiceValidation,
+        check('attachments').isArray().optional(),
+        check('attachments.*.key').exists().isString(),
       ],
       this.validationResult,
       asyncMiddleware(this.editSaleInvoice.bind(this)),

packages/server/src/database/migrations/20231108170207_create_documents_links.ts

@@ -4,6 +4,7 @@ exports.up = function (knex) {
     table.string('model_ref').notNullable();
     table.string('model_id').notNullable();
     table.integer('document_id').unsigned();
+    table.datetime('expires_at').nullable();
     table.timestamps();
   });
 };

packages/server/src/interfaces/Attachments.ts

@@ -0,0 +1,3 @@
+export interface AttachmentLinkDTO {
+  key: string;
+}

packages/server/src/interfaces/Bill.ts

@@ -2,6 +2,7 @@ import { Knex } from 'knex';
 import { IDynamicListFilterDTO } from './DynamicFilter';
 import { IItemEntry, IItemEntryDTO } from './ItemEntry';
 import { IBillLandedCost } from './LandedCost';
+import { AttachmentLinkDTO } from './Attachments';
 
 export interface IBillDTO {
   vendorId: number;
@@ -20,6 +21,7 @@ export interface IBillDTO {
   warehouseId?: number;
   projectId?: number;
   isInclusiveTax?: boolean;
+  attachments?: AttachmentLinkDTO[];
 }
 
 export interface IBillEditDTO {
@@ -38,6 +40,7 @@ export interface IBillEditDTO {
   branchId?: number;
   warehouseId?: number;
   projectId?: number;
+  attachments?: AttachmentLinkDTO[];
 }
 
 export interface IBill {
@@ -105,6 +108,7 @@ export interface IBillsService {
 export interface IBillCreatedPayload {
   tenantId: number;
   bill: IBill;
+  billDTO: IBillDTO;
   billId: number;
   trx: Knex.Transaction;
 }
@@ -126,6 +130,7 @@ export interface IBillEditedPayload {
   billId: number;
   oldBill: IBill;
   bill: IBill;
+  billDTO: IBillDTO;
   trx: Knex.Transaction;
 }
 

packages/server/src/interfaces/BillPayment.ts

@@ -1,5 +1,6 @@
 import { Knex } from 'knex';
 import { IBill } from './Bill';
+import { AttachmentLinkDTO } from './Attachments';
 
 export interface IBillPaymentEntry {
   id?: number;
@@ -45,6 +46,7 @@ export interface IBillPaymentDTO {
   reference: string;
   entries: IBillPaymentEntryDTO[];
   branchId?: number;
+  attachments?: AttachmentLinkDTO[];
 }
 
 export interface IBillReceivePageEntry {
@@ -66,6 +68,7 @@ export interface IBillPaymentsService {
 export interface IBillPaymentEventCreatedPayload {
   tenantId: number;
   billPayment: IBillPayment;
+  billPaymentDTO: IBillPaymentDTO;
   billPaymentId: number;
   trx: Knex.Transaction;
 }
@@ -87,6 +90,7 @@ export interface IBillPaymentEventEditedPayload {
   billPaymentId: number;
   billPayment: IBillPayment;
   oldBillPayment: IBillPayment;
+  billPaymentDTO: IBillPaymentDTO;
   trx: Knex.Transaction;
 }
 

packages/server/src/interfaces/CreditNote.ts

@@ -1,6 +1,7 @@
 import { Knex } from 'knex';
 import { IDynamicListFilter, IItemEntry, IVendorCredit } from '@/interfaces';
 import { ILedgerEntry } from './Ledger';
+import { AttachmentLinkDTO } from './Attachments';
 
 export interface ICreditNoteEntryNewDTO {
   index: number;
@@ -21,6 +22,7 @@ export interface ICreditNoteNewDTO {
   entries: ICreditNoteEntryNewDTO[];
   branchId?: number;
   warehouseId?: number;
+  attachments?: AttachmentLinkDTO[]
 }
 
 export interface ICreditNoteEditDTO {
@@ -33,6 +35,7 @@ export interface ICreditNoteEditDTO {
   entries: ICreditNoteEntryNewDTO[];
   branchId?: number;
   warehouseId?: number;
+  attachments?: AttachmentLinkDTO[]
 }
 
 export interface ICreditNoteEntry extends IItemEntry {}

packages/server/src/interfaces/Expenses.ts

@@ -2,6 +2,7 @@ import { Knex } from 'knex';
 import { ISystemUser } from './User';
 import { IFilterRole } from './DynamicFilter';
 import { IAccount } from './Account';
+import { AttachmentLinkDTO } from './Attachments';
 
 export interface IPaginationMeta {
   total: number;
@@ -81,6 +82,7 @@ export interface IExpenseCommonDTO {
   categories: IExpenseCategoryDTO[];
 
   branchId?: number;
+  attachments?: AttachmentLinkDTO[];
 }
 
 export interface IExpenseCreateDTO extends IExpenseCommonDTO {}
@@ -152,6 +154,7 @@ export interface IExpenseCreatedPayload {
   expenseId: number;
   authorizedUser: ISystemUser;
   expense: IExpense;
+  expenseDTO: IExpenseCreateDTO;
   trx: Knex.Transaction;
 }
 

packages/server/src/interfaces/ManualJournal.ts

@@ -2,6 +2,7 @@ import { Knex } from 'knex';
 import { IDynamicListFilterDTO } from './DynamicFilter';
 import { ISystemUser } from './User';
 import { IAccount } from './Account';
+import { AttachmentLinkDTO } from './Attachments';
 
 export interface IManualJournal {
   id?: number;
@@ -56,6 +57,7 @@ export interface IManualJournalDTO {
   publish?: boolean;
   branchId?: number;
   entries: IManualJournalEntryDTO[];
+  attachments?: AttachmentLinkDTO[];
 }
 
 export interface IManualJournalsFilter extends IDynamicListFilterDTO {
@@ -142,6 +144,7 @@ export interface IManualJournalEventEditedPayload {
   tenantId: number;
   manualJournal: IManualJournal;
   oldManualJournal: IManualJournal;
+  manualJournalDTO: IManualJournalDTO;
   trx: Knex.Transaction;
 }
 export interface IManualJournalEditingPayload {
@@ -161,6 +164,7 @@ export interface IManualJournalEventCreatedPayload {
   tenantId: number;
   manualJournal: IManualJournal;
   manualJournalId: number;
+  manualJournalDTO: IManualJournalDTO;
   trx: Knex.Transaction;
 }
 

packages/server/src/interfaces/PaymentReceive.ts

@@ -6,6 +6,7 @@ import {
 } from '@/interfaces';
 import { ILedgerEntry } from './Ledger';
 import { ISaleInvoice } from './SaleInvoice';
+import { AttachmentLinkDTO } from './Attachments';
 
 export interface IPaymentReceive {
   id?: number;
@@ -37,6 +38,7 @@ export interface IPaymentReceiveCreateDTO {
   entries: IPaymentReceiveEntryDTO[];
 
   branchId?: number;
+  attachments?: AttachmentLinkDTO[];
 }
 
 export interface IPaymentReceiveEditDTO {
@@ -50,6 +52,7 @@ export interface IPaymentReceiveEditDTO {
   statement: string;
   entries: IPaymentReceiveEntryDTO[];
   branchId?: number;
+  attachments?: AttachmentLinkDTO[];
 }
 
 export interface IPaymentReceiveEntry {
@@ -114,6 +117,7 @@ export interface IPaymentReceiveCreatedPayload {
   paymentReceive: IPaymentReceive;
   paymentReceiveId: number;
   authorizedUser: ISystemUser;
+  paymentReceiveDTO: IPaymentReceiveCreateDTO;
   trx: Knex.Transaction;
 }
 
@@ -122,6 +126,7 @@ export interface IPaymentReceiveEditedPayload {
   paymentReceiveId: number;
   paymentReceive: IPaymentReceive;
   oldPaymentReceive: IPaymentReceive;
+  paymentReceiveDTO: IPaymentReceiveEditDTO;
   authorizedUser: ISystemUser;
   trx: Knex.Transaction;
 }

packages/server/src/interfaces/SaleEstimate.ts

@@ -2,6 +2,7 @@ import { Knex } from 'knex';
 import { IItemEntry, IItemEntryDTO } from './ItemEntry';
 import { IDynamicListFilterDTO } from '@/interfaces/DynamicFilter';
 import { CommonMailOptions, CommonMailOptionsDTO } from './Mailable';
+import { AttachmentLinkDTO } from './Attachments';
 
 export interface ISaleEstimate {
   id?: number;
@@ -38,6 +39,7 @@ export interface ISaleEstimateDTO {
 
   branchId?: number;
   warehouseId?: number;
+  attachments?: AttachmentLinkDTO[];
 }
 
 export interface ISalesEstimatesFilter extends IDynamicListFilterDTO {
@@ -70,6 +72,7 @@ export interface ISaleEstimateEditedPayload {
   estimateId: number;
   saleEstimate: ISaleEstimate;
   oldSaleEstimate: ISaleEstimate;
+  estimateDTO: ISaleEstimateDTO;
   trx: Knex.Transaction;
 }
 

packages/server/src/interfaces/SaleInvoice.ts

@@ -3,6 +3,7 @@ import { ISystemUser, IAccount, ITaxTransaction } from '@/interfaces';
 import { CommonMailOptions, CommonMailOptionsDTO } from './Mailable';
 import { IDynamicListFilter } from '@/interfaces/DynamicFilter';
 import { IItemEntry, IItemEntryDTO } from './ItemEntry';
+import { AttachmentLinkDTO } from './Attachments';
 
 export interface ISaleInvoice {
   id: number;
@@ -64,6 +65,8 @@ export interface ISaleInvoiceDTO {
   branchId?: number | null;
 
   isInclusiveTax?: boolean;
+
+  attachments?: AttachmentLinkDTO[];
 }
 
 export interface ISaleInvoiceCreateDTO extends ISaleInvoiceDTO {

packages/server/src/interfaces/SaleReceipt.ts

@@ -1,6 +1,7 @@
 import { Knex } from 'knex';
 import { IItemEntry } from './ItemEntry';
 import { CommonMailOptions, CommonMailOptionsDTO } from './Mailable';
+import { AttachmentLinkDTO } from './Attachments';
 
 export interface ISaleReceipt {
   id?: number;
@@ -43,6 +44,7 @@ export interface ISaleReceiptDTO {
   closed: boolean;
   entries: any[];
   branchId?: number;
+  attachments?: AttachmentLinkDTO[];
 }
 
 export interface ISalesReceiptsService {
@@ -85,6 +87,7 @@ export interface ISaleReceiptCreatedPayload {
   tenantId: number;
   saleReceipt: ISaleReceipt;
   saleReceiptId: number;
+  saleReceiptDTO: ISaleReceiptDTO;
   trx: Knex.Transaction;
 }
 
@@ -93,6 +96,7 @@ export interface ISaleReceiptEditedPayload {
   oldSaleReceipt: number;
   saleReceipt: ISaleReceipt;
   saleReceiptId: number;
+  saleReceiptDTO: ISaleReceiptDTO;
   trx: Knex.Transaction;
 }
 

packages/server/src/interfaces/VendorCredit.ts

@@ -1,5 +1,6 @@
 import { IDynamicListFilter, IItemEntry, IItemEntryDTO } from '@/interfaces';
 import { Knex } from 'knex';
+import { AttachmentLinkDTO } from './Attachments';
 
 export enum VendorCreditAction {
   Create = 'Create',
@@ -61,6 +62,7 @@ export interface IVendorCreditDTO {
 
   branchId?: number;
   warehouseId?: number;
+  attachments?: AttachmentLinkDTO[];
 }
 
 export interface IVendorCreditCreateDTO extends IVendorCreditDTO {}
@@ -118,6 +120,7 @@ export interface IVendorCreditEditedPayload {
   oldVendorCredit: IVendorCredit;
   vendorCredit: IVendorCredit;
   vendorCreditId: number;
+  vendorCreditDTO: IVendorCreditEditDTO;
   trx: Knex.Transaction;
 }
 

packages/server/src/loaders/eventEmitter.ts

@@ -92,7 +92,16 @@ import { DeleteCashflowTransactionOnUncategorize } from '@/services/Cashflow/sub
 import { PreventDeleteTransactionOnDelete } from '@/services/Cashflow/subscribers/PreventDeleteTransactionsOnDelete';
 import { SubscribeFreeOnSignupCommunity } from '@/services/Subscription/events/SubscribeFreeOnSignupCommunity';
 import { SendVerfiyMailOnSignUp } from '@/services/Authentication/events/SendVerfiyMailOnSignUp';
-
+import { AttachmentsOnSaleInvoiceCreated } from '@/services/Attachments/events/AttachmentsOnSaleInvoice';
+import { AttachmentsOnSaleReceipt } from '@/services/Attachments/events/AttachmentsOnSaleReceipts';
+import { AttachmentsOnManualJournals } from '@/services/Attachments/events/AttachmentsOnManualJournals';
+import { AttachmentsOnExpenses } from '@/services/Attachments/events/AttachmentsOnExpenses';
+import { AttachmentsOnBills } from '@/services/Attachments/events/AttachmentsOnBills';
+import { AttachmentsOnPaymentsReceived } from '@/services/Attachments/events/AttachmentsOnPaymentsReceived';
+import { AttachmentsOnVendorCredits } from '@/services/Attachments/events/AttachmentsOnVendorCredits';
+import { AttachmentsOnCreditNote } from '@/services/Attachments/events/AttachmentsOnCreditNote';
+import { AttachmentsOnBillPayments } from '@/services/Attachments/events/AttachmentsOnPaymentsMade';
+import { AttachmentsOnSaleEstimates } from '@/services/Attachments/events/AttachmentsOnSaleEstimates';
 
 export default () => {
   return new EventPublisher();
@@ -224,6 +233,18 @@ export const susbcribers = () => {
     PreventDeleteTransactionOnDelete,
 
     SubscribeFreeOnSignupCommunity,
-    SendVerfiyMailOnSignUp
+    SendVerfiyMailOnSignUp,
+
+    // Attachments
+    AttachmentsOnSaleInvoiceCreated,
+    AttachmentsOnSaleEstimates,
+    AttachmentsOnSaleReceipt,
+    AttachmentsOnPaymentsReceived,
+    AttachmentsOnCreditNote,
+    AttachmentsOnVendorCredits,
+    AttachmentsOnBills,
+    AttachmentsOnBillPayments,
+    AttachmentsOnManualJournals,
+    AttachmentsOnExpenses,
   ];
 };

packages/server/src/models/Bill.ts

@@ -403,6 +403,7 @@ export default class Bill extends mixin(TenantModel, [
     const BillLandedCost = require('models/BillLandedCost');
     const Branch = require('models/Branch');
     const TaxRateTransaction = require('models/TaxRateTransaction');
+    const Document = require('models/Document');
 
     return {
       vendor: {
@@ -465,6 +466,25 @@ export default class Bill extends mixin(TenantModel, [
           builder.where('reference_type', 'Bill');
         },
       },
+
+      /**
+       * Bill may has many attached attachments.
+       */
+      attachments: {
+        relation: Model.ManyToManyRelation,
+        modelClass: Document.default,
+        join: {
+          from: 'bills.id',
+          through: {
+            from: 'document_links.modelId',
+            to: 'document_links.documentId',
+          },
+          to: 'documents.id',
+        },
+        filter(query) {
+          query.where('model_ref', 'Bill');
+        },
+      },
     };
   }
 

packages/server/src/models/BillPayment.ts

@@ -56,6 +56,7 @@ export default class BillPayment extends mixin(TenantModel, [
     const Vendor = require('models/Vendor');
     const Account = require('models/Account');
     const Branch = require('models/Branch');
+    const Document = require('models/Document');
 
     return {
       entries: {
@@ -114,6 +115,25 @@ export default class BillPayment extends mixin(TenantModel, [
           to: 'branches.id',
         },
       },
+
+      /**
+       * Bill payment may has many attached attachments.
+       */
+      attachments: {
+        relation: Model.ManyToManyRelation,
+        modelClass: Document.default,
+        join: {
+          from: 'bills_payments.id',
+          through: {
+            from: 'document_links.modelId',
+            to: 'document_links.documentId',
+          },
+          to: 'documents.id',
+        },
+        filter(query) {
+          query.where('model_ref', 'BillPayment');
+        },
+      },
     };
   }
 

packages/server/src/models/CreditNote.ts

@@ -174,6 +174,7 @@ export default class CreditNote extends mixin(TenantModel, [
     const ItemEntry = require('models/ItemEntry');
     const Customer = require('models/Customer');
     const Branch = require('models/Branch');
+    const Document = require('models/Document');
 
     return {
       /**
@@ -233,6 +234,25 @@ export default class CreditNote extends mixin(TenantModel, [
           to: 'branches.id',
         },
       },
+
+      /**
+       * Credit note may has many attached attachments.
+       */
+      attachments: {
+        relation: Model.ManyToManyRelation,
+        modelClass: Document.default,
+        join: {
+          from: 'credit_notes.id',
+          through: {
+            from: 'document_links.modelId',
+            to: 'document_links.documentId',
+          },
+          to: 'documents.id',
+        },
+        filter(query) {
+          query.where('model_ref', 'CreditNote');
+        },
+      },
     };
   }
 

packages/server/src/models/Expense.ts

@@ -180,7 +180,7 @@ export default class Expense extends mixin(TenantModel, [
   static get relationMappings() {
     const Account = require('models/Account');
     const ExpenseCategory = require('models/ExpenseCategory');
-    const Media = require('models/Media');
+    const Document = require('models/Document');
     const Branch = require('models/Branch');
 
     return {
@@ -217,21 +217,21 @@ export default class Expense extends mixin(TenantModel, [
       },
 
       /**
-       * 
+       * Expense transaction may has many attached attachments.
        */
-      media: {
+      attachments: {
         relation: Model.ManyToManyRelation,
-        modelClass: Media.default,
+        modelClass: Document.default,
         join: {
           from: 'expenses_transactions.id',
           through: {
-            from: 'media_links.model_id',
+            from: 'document_links.modelId',
-            to: 'media_links.media_id',
+            to: 'document_links.documentId',
           },
-          to: 'media.id',
+          to: 'documents.id',
         },
         filter(query) {
-          query.where('model_name', 'Expense');
+          query.where('model_ref', 'Expense');
         },
       },
     };

packages/server/src/models/ManualJournal.ts

@@ -94,9 +94,9 @@ export default class ManualJournal extends mixin(TenantModel, [
    * Relationship mapping.
    */
   static get relationMappings() {
-    const Media = require('models/Media');
     const AccountTransaction = require('models/AccountTransaction');
     const ManualJournalEntry = require('models/ManualJournalEntry');
+    const ManualJournal = require('models/ManualJournal');
 
     return {
       entries: {
@@ -121,19 +121,23 @@ export default class ManualJournal extends mixin(TenantModel, [
           query.where('referenceType', 'Journal');
         },
       },
-      media: {
+
+      /**
+       * Manual journal may has many attached attachments.
+       */
+      attachments: {
         relation: Model.ManyToManyRelation,
-        modelClass: Media.default,
+        modelClass: ManualJournal.default,
         join: {
           from: 'manual_journals.id',
           through: {
-            from: 'media_links.model_id',
+            from: 'document_links.modelId',
-            to: 'media_links.media_id',
+            to: 'document_links.documentId',
           },
-          to: 'media.id',
+          to: 'documents.id',
         },
         filter(query) {
-          query.where('model_name', 'ManualJournal');
+          query.where('model_ref', 'ManualJournal');
         },
       },
     };

packages/server/src/models/PaymentReceive.ts

@@ -56,6 +56,7 @@ export default class PaymentReceive extends mixin(TenantModel, [
     const Customer = require('models/Customer');
     const Account = require('models/Account');
     const Branch = require('models/Branch');
+    const Document = require('models/Document');
 
     return {
       customer: {
@@ -111,6 +112,25 @@ export default class PaymentReceive extends mixin(TenantModel, [
           to: 'branches.id',
         },
       },
+
+      /**
+       * Payment transaction may has many attached attachments.
+       */
+      attachments: {
+        relation: Model.ManyToManyRelation,
+        modelClass: Document.default,
+        join: {
+          from: 'payment_receives.id',
+          through: {
+            from: 'document_links.modelId',
+            to: 'document_links.documentId',
+          },
+          to: 'documents.id',
+        },
+        filter(query) {
+          query.where('model_ref', 'PaymentReceive');
+        },
+      },
     };
   }
 

packages/server/src/models/SaleEstimate.ts

@@ -182,6 +182,7 @@ export default class SaleEstimate extends mixin(TenantModel, [
     const ItemEntry = require('models/ItemEntry');
     const Customer = require('models/Customer');
     const Branch = require('models/Branch');
+    const Document = require('models/Document');
 
     return {
       customer: {
@@ -219,6 +220,25 @@ export default class SaleEstimate extends mixin(TenantModel, [
           to: 'branches.id',
         },
       },
+
+      /**
+       * Sale estimate transaction may has many attached attachments.
+       */
+      attachments: {
+        relation: Model.ManyToManyRelation,
+        modelClass: Document.default,
+        join: {
+          from: 'sales_estimates.id',
+          through: {
+            from: 'document_links.modelId',
+            to: 'document_links.documentId',
+          },
+          to: 'documents.id',
+        },
+        filter(query) {
+          query.where('model_ref', 'Expense');
+        },
+      },
     };
   }
 

packages/server/src/models/SaleInvoice.ts

@@ -410,7 +410,7 @@ export default class SaleInvoice extends mixin(TenantModel, [
     const Branch = require('models/Branch');
     const Account = require('models/Account');
     const TaxRateTransaction = require('models/TaxRateTransaction');
-    const DocumentLink = require('models/DocumentLink');
+    const Document = require('models/Document');
 
     return {
       /**
@@ -526,17 +526,21 @@ export default class SaleInvoice extends mixin(TenantModel, [
       },
 
       /**
-       * Invoice may has many attachments.
+       * Sale invoice transaction may has many attached attachments.
        */
       attachments: {
-        relation: Model.HasManyRelation,
+        relation: Model.ManyToManyRelation,
-        modelClass: DocumentLink.default,
+        modelClass: Document.default,
         join: {
           from: 'sales_invoices.id',
-          to: 'document_links.modelId',
+          through: {
+            from: 'document_links.modelId',
+            to: 'document_links.documentId',
+          },
+          to: 'documents.id',
         },
-        filter: (builder) => {
+        filter(query) {
-          builder.where('modelRef', 'SaleInvoice');
+          query.where('model_ref', 'Expense');
         },
       },
     };

packages/server/src/models/SaleReceipt.ts

@@ -108,6 +108,7 @@ export default class SaleReceipt extends mixin(TenantModel, [
     const AccountTransaction = require('models/AccountTransaction');
     const ItemEntry = require('models/ItemEntry');
     const Branch = require('models/Branch');
+    const Document = require('models/Document');
 
     return {
       customer: {
@@ -167,6 +168,25 @@ export default class SaleReceipt extends mixin(TenantModel, [
           to: 'branches.id',
         },
       },
+
+      /**
+       * Sale receipt transaction may has many attached attachments.
+       */
+      attachments: {
+        relation: Model.ManyToManyRelation,
+        modelClass: Document.default,
+        join: {
+          from: 'sales_receipts.id',
+          through: {
+            from: 'document_links.modelId',
+            to: 'document_links.documentId',
+          },
+          to: 'documents.id',
+        },
+        filter(query) {
+          query.where('model_ref', 'SaleReceipt');
+        },
+      },
     };
   }
 

packages/server/src/models/VendorCredit.ts

@@ -177,6 +177,7 @@ export default class VendorCredit extends mixin(TenantModel, [
     const Vendor = require('models/Vendor');
     const ItemEntry = require('models/ItemEntry');
     const Branch = require('models/Branch');
+    const Document = require('models/Document');
 
     return {
       vendor: {
@@ -215,6 +216,25 @@ export default class VendorCredit extends mixin(TenantModel, [
           to: 'branches.id',
         },
       },
+
+      /**
+       * Vendor credit may has many attached attachments.
+       */
+      attachments: {
+        relation: Model.ManyToManyRelation,
+        modelClass: Document.default,
+        join: {
+          from: 'vendor_credits.id',
+          through: {
+            from: 'document_links.modelId',
+            to: 'document_links.documentId',
+          },
+          to: 'documents.id',
+        },
+        filter(query) {
+          query.where('model_ref', 'VendorCredit');
+        },
+      },
     };
   }
 

packages/server/src/services/Attachments/AttachmentTransformer.ts

@@ -0,0 +1,19 @@
+import { Transformer } from '@/lib/Transformer/Transformer';
+
+export class AttachmentTransformer extends Transformer {
+  /**
+   * Exclude attributes.
+   * @returns {string[]}
+   */
+  public excludeAttributes = (): string[] => {
+    return ['*'];
+  };
+
+  /**
+   * Includeded attributes.
+   * @returns {string[]}
+   */
+  public includeAttributes = (): string[] => {
+    return ['extension', 'key'];
+  };
+}

packages/server/src/services/Attachments/LinkAttachment.ts

@@ -1,4 +1,6 @@
 import { Inject, Service } from 'typedi';
+import bluebird from 'bluebird';
+import { Knex } from 'knex';
 import {
   validateLinkModelEntryExists,
   validateLinkModelExists,
@@ -12,38 +14,68 @@ export class LinkAttachment {
   private tenancy: HasTenancyService;
 
   /**
-   *
+   * Links the given file key to the given model type and id.
    * @param {number} tenantId
    * @param {string} filekey
    * @param {string} modelRef
    * @param {number} modelId
+   * @returns {Promise<void>}
    */
   async link(
     tenantId: number,
     filekey: string,
     modelRef: string,
-    modelId: number
+    modelId: number,
+    trx?: Knex.Transaction
   ) {
     const { DocumentLink, Document, ...models } = this.tenancy.models(tenantId);
     const LinkModel = models[modelRef];
     validateLinkModelExists(LinkModel);
 
-    const foundLinkModel = await LinkModel.query().findById(modelId);
+    const foundLinkModel = await LinkModel.query(trx).findById(modelId);
     validateLinkModelEntryExists(foundLinkModel);
 
-    const foundLinks = await DocumentLink.query()
+    const foundLinks = await DocumentLink.query(trx)
       .where('modelRef', modelRef)
       .where('modelId', modelId);
 
     if (foundLinks.length > 0) {
-      throw new ServiceError('');
+      throw new ServiceError('DOCUMENT_LINK_ALREADY_LINKED');
     }
-    const foundFile = await Document.query().findOne('key', filekey);
+    const foundFile = await Document.query(trx).findOne('key', filekey);
 
-    await DocumentLink.query().insert({
+    await DocumentLink.query(trx).insert({
       modelRef,
       modelId,
       documentId: foundFile.id,
     });
   }
+
+  /**
+   * Links the given file keys to the given model type and id.
+   * @param {number} tenantId
+   * @param {string[]} filekeys
+   * @param {string} modelRef
+   * @param {number} modelId
+   * @param {Knex.Transaction} trx
+   * @returns {Promise<void>}
+   */
+  async bulkLink(
+    tenantId: number,
+    filekeys: string[],
+    modelRef: string,
+    modelId: number,
+    trx?: Knex.Transaction
+  ) {
+    await bluebird.map(
+      filekeys,
+      (fieldKey: string) =>
+        this.link(tenantId, fieldKey, modelRef, modelId, trx),
+      {
+        concurrency: CONCURRENCY_ASYNC,
+      }
+    );
+  }
 }
+
+const CONCURRENCY_ASYNC = 10;

packages/server/src/services/Attachments/UnlinkAttachment.ts

@@ -1,9 +1,12 @@
 import { Inject, Service } from 'typedi';
+import bluebird from 'bluebird';
 import HasTenancyService from '../Tenancy/TenancyService';
 import {
   validateLinkModelEntryExists,
   validateLinkModelExists,
 } from './_utils';
+import { Knex } from 'knex';
+import { difference } from 'lodash';
 
 @Service()
 export class UnlinkAttachment {
@@ -11,7 +14,7 @@ export class UnlinkAttachment {
   private tenancy: HasTenancyService;
 
   /**
-   *
+   * Unlink the attachments from the model entry.
    * @param {number} tenantId
    * @param {string} filekey
    * @param {string} modelRef
@@ -21,19 +24,105 @@ export class UnlinkAttachment {
     tenantId: number,
     filekey: string,
     modelRef: string,
-    modelId: number
+    modelId: number,
-  ) {
+    trx?: Knex.Transaction
-    const { DocumentLink, ...models } = this.tenancy.models(tenantId);
+  ): Promise<void> {
+    const { DocumentLink, Document, ...models } = this.tenancy.models(tenantId);
     const LinkModel = models[modelRef];
     validateLinkModelExists(LinkModel);
 
-    const foundLinkModel = await LinkModel.query().findById(modelId);
+    const foundLinkModel = await LinkModel.query(trx).findById(modelId);
     validateLinkModelEntryExists(foundLinkModel);
 
+    const document = await Document.query().findOne('key', filekey);
+
     // Delete the document link.
-    await DocumentLink.query()
+    await DocumentLink.query(trx)
       .where('modelRef', modelRef)
       .where('modelId', modelId)
+      .where('documentId', document.id)
       .delete();
   }
+
+  /**
+   * Bulk unlink the attachments from the model entry.
+   * @param {number} tenantId
+   * @param {string} fieldkey
+   * @param {string} modelRef
+   * @param {number} modelId
+   * @returns {Promise<void>}
+   */
+  async bulkUnlink(
+    tenantId: number,
+    filekeys: string[],
+    modelRef: string,
+    modelId: number,
+    trx?: Knex.Transaction
+  ): Promise<void> {
+    await bluebird.map(
+      filekeys,
+      (fieldKey: string) =>
+        this.unlink(tenantId, fieldKey, modelRef, modelId, trx),
+      {
+        concurrency: CONCURRENCY_ASYNC,
+      }
+    );
+  }
+
+  /**
+   * Unlink all the unpresented keys of the given model type and id.
+   * @param {number} tenantId
+   * @param {string[]} presentedKeys
+   * @param {string} modelRef
+   * @param {number} modelId
+   * @param {Knex.Transaction} trx
+   */
+  async unlinkUnpresentedKeys(
+    tenantId: number,
+    presentedKeys: string[],
+    modelRef: string,
+    modelId: number,
+    trx?: Knex.Transaction
+  ): Promise<void> {
+    const { DocumentLink } = this.tenancy.models(tenantId);
+
+    const modelLinks = await DocumentLink.query(trx)
+      .where('modelRef', modelRef)
+      .where('modelId', modelId)
+      .withGraphFetched('document');
+
+    const modelLinkKeys = modelLinks.map((link) => link.document.key);
+    const unpresentedKeys = difference(modelLinkKeys, presentedKeys);
+
+    await this.bulkUnlink(tenantId, unpresentedKeys, modelRef, modelId, trx);
+  }
+
+  /**
+   * Unlink all attachments of the given model type and id.
+   * @param {number} tenantId
+   * @param {string} modelRef
+   * @param {number} modelId
+   * @param {Knex.Transaction} trx
+   * @returns {Promise<void>}
+   */
+  async unlinkAllModelKeys(
+    tenantId: number,
+    modelRef: string,
+    modelId: number,
+    trx?: Knex.Transaction
+  ): Promise<void> {
+    const { DocumentLink } = this.tenancy.models(tenantId);
+
+    // Get all the keys of the modelRef and modelId.
+    const modelLinks = await DocumentLink.query(trx)
+      .where('modelRef', modelRef)
+      .where('modelId', modelId)
+      .withGraphFetched('document');
+
+    const modelLinkKeys = modelLinks.map((link) => link.document.key);
+
+    await this.bulkUnlink(tenantId, modelLinkKeys, modelRef, modelId, trx);
+  }
 }
+
+const CONCURRENCY_ASYNC = 10;

packages/server/src/services/Attachments/ValidateAttachments.ts

@@ -0,0 +1,29 @@
+import { castArray, difference } from 'lodash';
+import HasTenancyService from '../Tenancy/TenancyService';
+import { ServiceError } from '@/exceptions';
+import { Inject, Service } from 'typedi';
+
+@Service()
+export class ValidateAttachments {
+  @Inject()
+  tenancy: HasTenancyService;
+
+  /**
+   * Validates the given file keys existance.
+   * @param {number} tenantId
+   * @param {string|string[]} key
+   */
+  async validate(tenantId: number, key: string | string[]) {
+    const { Document } = this.tenancy.models(tenantId);
+
+    const keys = castArray(key);
+    const documents = await Document.query().whereIn('key', key);
+    const documentKeys = documents.map((document) => document.key);
+
+    const notFoundKeys = difference(keys, documentKeys);
+
+    if (notFoundKeys.length > 0) {
+      throw new ServiceError('DOCUMENT_KEYS_INVALID');
+    }
+  }
+}

packages/server/src/services/Attachments/events/AttachmentsOnBills.ts

@@ -0,0 +1,149 @@
+import { Inject, Service } from 'typedi';
+import { isEmpty } from 'lodash';
+import {
+  IBIllEventDeletedPayload,
+  IBillCreatedPayload,
+  IBillCreatingPayload,
+  IBillEditedPayload,
+} from '@/interfaces';
+import events from '@/subscribers/events';
+import { LinkAttachment } from '../LinkAttachment';
+import { ValidateAttachments } from '../ValidateAttachments';
+import { UnlinkAttachment } from '../UnlinkAttachment';
+
+@Service()
+export class AttachmentsOnBills {
+  @Inject()
+  private linkAttachmentService: LinkAttachment;
+
+  @Inject()
+  private unlinkAttachmentService: UnlinkAttachment;
+
+  @Inject()
+  private validateDocuments: ValidateAttachments;
+
+  /**
+   * Constructor method.
+   */
+  public attach(bus) {
+    bus.subscribe(
+      events.bill.onCreating,
+      this.validateAttachmentsOnBillCreate.bind(this)
+    );
+    bus.subscribe(
+      events.bill.onCreated,
+      this.handleAttachmentsOnBillCreated.bind(this)
+    );
+    bus.subscribe(
+      events.bill.onEdited,
+      this.handleUnlinkUnpresentedKeysOnBillEdited.bind(this)
+    );
+    bus.subscribe(
+      events.bill.onEdited,
+      this.handleLinkPresentedKeysOnBillEdited.bind(this)
+    );
+    bus.subscribe(
+      events.bill.onDeleting,
+      this.handleUnlinkAttachmentsOnBillDeleted.bind(this)
+    );
+  }
+
+  /**
+   * Validates the attachment keys on creating bill.
+   * @param {ISaleInvoiceCreatingPaylaod}
+   * @returns {Promise<void>}
+   */
+  private async validateAttachmentsOnBillCreate({
+    billDTO,
+    tenantId,
+  }: IBillCreatingPayload): Promise<void> {
+    if (isEmpty(billDTO.attachments)) {
+      return;
+    }
+    const documentKeys = billDTO?.attachments?.map((a) => a.key);
+
+    await this.validateDocuments.validate(tenantId, documentKeys);
+  }
+
+  /**
+   * Handles linking the attachments of the created bill.
+   * @param {ISaleInvoiceCreatedPayload}
+   * @returns {Promise<void>}
+   */
+  private async handleAttachmentsOnBillCreated({
+    tenantId,
+    bill,
+    billDTO,
+    trx,
+  }: IBillCreatedPayload): Promise<void> {
+    if (isEmpty(billDTO.attachments)) return;
+
+    const keys = billDTO.attachments?.map((attachment) => attachment.key);
+    await this.linkAttachmentService.bulkLink(
+      tenantId,
+      keys,
+      'Bill',
+      bill.id,
+      trx
+    );
+  }
+
+  /**
+   * Handles unlinking all the unpresented keys of the edited bill.
+   * @param {IBillEditedPayload}
+   */
+  private async handleUnlinkUnpresentedKeysOnBillEdited({
+    tenantId,
+    billDTO,
+    bill,
+  }: IBillEditedPayload) {
+    const keys = billDTO.attachments?.map((attachment) => attachment.key);
+    await this.unlinkAttachmentService.unlinkUnpresentedKeys(
+      tenantId,
+      keys,
+      'Bill',
+      bill.id
+    );
+  }
+
+  /**
+   * Handles linking all the presented keys of the edited bill.
+   * @param {ISaleInvoiceEditedPayload}
+   * @returns {Promise<void>}
+   */
+  private async handleLinkPresentedKeysOnBillEdited({
+    tenantId,
+    billDTO,
+    oldBill,
+    trx,
+  }: IBillEditedPayload) {
+    if (isEmpty(billDTO.attachments)) return;
+
+    const keys = billDTO.attachments?.map((attachment) => attachment.key);
+    await this.linkAttachmentService.bulkLink(
+      tenantId,
+      keys,
+      'Bill',
+      oldBill.id,
+      trx
+    );
+  }
+
+  /**
+   * Unlink all attachments once the bill deleted.
+   * @param {ISaleInvoiceDeletedPayload}
+   * @returns {Promise<void>}
+   */
+  private async handleUnlinkAttachmentsOnBillDeleted({
+    tenantId,
+    oldBill,
+    trx,
+  }: IBIllEventDeletedPayload) {
+    await this.unlinkAttachmentService.unlinkAllModelKeys(
+      tenantId,
+      'Bill',
+      oldBill.id,
+      trx
+    );
+  }
+}

packages/server/src/services/Attachments/events/AttachmentsOnCreditNote.ts

@@ -0,0 +1,153 @@
+import { Inject, Service } from 'typedi';
+import { isEmpty } from 'lodash';
+import {
+  ICreditNoteCreatedPayload,
+  ICreditNoteCreatingPayload,
+  ICreditNoteDeletingPayload,
+  ICreditNoteEditedPayload,
+} from '@/interfaces';
+import events from '@/subscribers/events';
+import { LinkAttachment } from '../LinkAttachment';
+import { ValidateAttachments } from '../ValidateAttachments';
+import { UnlinkAttachment } from '../UnlinkAttachment';
+
+@Service()
+export class AttachmentsOnCreditNote {
+  @Inject()
+  private linkAttachmentService: LinkAttachment;
+
+  @Inject()
+  private unlinkAttachmentService: UnlinkAttachment;
+
+  @Inject()
+  private validateDocuments: ValidateAttachments;
+
+  /**
+   * Constructor method.
+   */
+  public attach(bus) {
+    bus.subscribe(
+      events.creditNote.onCreating,
+      this.validateAttachmentsOnCreditNoteCreate.bind(this)
+    );
+    bus.subscribe(
+      events.creditNote.onCreated,
+      this.handleAttachmentsOnCreditNoteCreated.bind(this)
+    );
+    bus.subscribe(
+      events.creditNote.onEdited,
+      this.handleUnlinkUnpresentedKeysOnCreditNoteEdited.bind(this)
+    );
+    bus.subscribe(
+      events.creditNote.onEdited,
+      this.handleLinkPresentedKeysOnCreditNoteEdited.bind(this)
+    );
+    bus.subscribe(
+      events.creditNote.onDeleting,
+      this.handleUnlinkAttachmentsOnCreditNoteDeleted.bind(this)
+    );
+  }
+
+  /**
+   * Validates the attachment keys on creating credit note.
+   * @param {ICreditNoteCreatingPayload}
+   * @returns {Promise<void>}
+   */
+  private async validateAttachmentsOnCreditNoteCreate({
+    creditNoteDTO,
+    tenantId,
+  }: ICreditNoteCreatingPayload): Promise<void> {
+    if (isEmpty(creditNoteDTO.attachments)) {
+      return;
+    }
+    const documentKeys = creditNoteDTO?.attachments?.map((a) => a.key);
+
+    await this.validateDocuments.validate(tenantId, documentKeys);
+  }
+
+  /**
+   * Handles linking the attachments of the created credit note.
+   * @param {ICreditNoteCreatedPayload}
+   * @returns {Promise<void>}
+   */
+  private async handleAttachmentsOnCreditNoteCreated({
+    tenantId,
+    creditNote,
+    creditNoteDTO,
+    trx,
+  }: ICreditNoteCreatedPayload): Promise<void> {
+    if (isEmpty(creditNoteDTO.attachments)) return;
+
+    const keys = creditNoteDTO.attachments?.map((attachment) => attachment.key);
+    await this.linkAttachmentService.bulkLink(
+      tenantId,
+      keys,
+      'CreditNote',
+      creditNote.id,
+      trx
+    );
+  }
+
+  /**
+   * Handles unlinking all the unpresented keys of the edited credit note.
+   * @param {ICreditNoteEditedPayload}
+   */
+  private async handleUnlinkUnpresentedKeysOnCreditNoteEdited({
+    tenantId,
+    creditNoteEditDTO,
+    oldCreditNote,
+  }: ICreditNoteEditedPayload) {
+    const keys = creditNoteEditDTO.attachments?.map(
+      (attachment) => attachment.key
+    );
+    await this.unlinkAttachmentService.unlinkUnpresentedKeys(
+      tenantId,
+      keys,
+      'CreditNote',
+      oldCreditNote.id
+    );
+  }
+
+  /**
+   * Handles linking all the presented keys of the edited credit note.
+   * @param {ICreditNoteEditedPayload}
+   * @returns {Promise<void>}
+   */
+  private async handleLinkPresentedKeysOnCreditNoteEdited({
+    tenantId,
+    creditNoteEditDTO,
+    oldCreditNote,
+    trx,
+  }: ICreditNoteEditedPayload) {
+    if (isEmpty(creditNoteEditDTO.attachments)) return;
+
+    const keys = creditNoteEditDTO.attachments?.map(
+      (attachment) => attachment.key
+    );
+    await this.linkAttachmentService.bulkLink(
+      tenantId,
+      keys,
+      'CreditNote',
+      oldCreditNote.id,
+      trx
+    );
+  }
+
+  /**
+   * Unlink all attachments once the credit note deleted.
+   * @param {ICreditNoteDeletingPayload}
+   * @returns {Promise<void>}
+   */
+  private async handleUnlinkAttachmentsOnCreditNoteDeleted({
+    tenantId,
+    oldCreditNote,
+    trx,
+  }: ICreditNoteDeletingPayload) {
+    await this.unlinkAttachmentService.unlinkAllModelKeys(
+      tenantId,
+      'CreditNote',
+      oldCreditNote.id,
+      trx
+    );
+  }
+}

packages/server/src/services/Attachments/events/AttachmentsOnExpenses.ts

@@ -0,0 +1,149 @@
+import { Inject, Service } from 'typedi';
+import { isEmpty } from 'lodash';
+import {
+  IExpenseCreatedPayload,
+  IExpenseCreatingPayload,
+  IExpenseDeletingPayload,
+  IExpenseEventEditPayload,
+} from '@/interfaces';
+import events from '@/subscribers/events';
+import { LinkAttachment } from '../LinkAttachment';
+import { ValidateAttachments } from '../ValidateAttachments';
+import { UnlinkAttachment } from '../UnlinkAttachment';
+
+@Service()
+export class AttachmentsOnExpenses {
+  @Inject()
+  private linkAttachmentService: LinkAttachment;
+
+  @Inject()
+  private unlinkAttachmentService: UnlinkAttachment;
+
+  @Inject()
+  private validateDocuments: ValidateAttachments;
+
+  /**
+   * Constructor method.
+   */
+  public attach(bus) {
+    bus.subscribe(
+      events.expenses.onCreating,
+      this.validateAttachmentsOnExpenseCreate.bind(this)
+    );
+    bus.subscribe(
+      events.expenses.onCreated,
+      this.handleAttachmentsOnExpenseCreated.bind(this)
+    );
+    bus.subscribe(
+      events.expenses.onEdited,
+      this.handleUnlinkUnpresentedKeysOnExpenseEdited.bind(this)
+    );
+    bus.subscribe(
+      events.expenses.onEdited,
+      this.handleLinkPresentedKeysOnExpenseEdited.bind(this)
+    );
+    bus.subscribe(
+      events.expenses.onDeleting,
+      this.handleUnlinkAttachmentsOnExpenseDeleted.bind(this)
+    );
+  }
+
+  /**
+   * Validates the attachment keys on creating expense.
+   * @param {ISaleInvoiceCreatingPaylaod}
+   * @returns {Promise<void>}
+   */
+  private async validateAttachmentsOnExpenseCreate({
+    expenseDTO,
+    tenantId,
+  }: IExpenseCreatingPayload): Promise<void> {
+    if (isEmpty(expenseDTO.attachments)) {
+      return;
+    }
+    const documentKeys = expenseDTO?.attachments?.map((a) => a.key);
+
+    await this.validateDocuments.validate(tenantId, documentKeys);
+  }
+
+  /**
+   * Handles linking the attachments of the created expense.
+   * @param {ISaleInvoiceCreatedPayload}
+   * @returns {Promise<void>}
+   */
+  private async handleAttachmentsOnExpenseCreated({
+    tenantId,
+    expenseDTO,
+    expense,
+    trx,
+  }: IExpenseCreatedPayload): Promise<void> {
+    if (isEmpty(expenseDTO.attachments)) return;
+
+    const keys = expenseDTO.attachments?.map((attachment) => attachment.key);
+    await this.linkAttachmentService.bulkLink(
+      tenantId,
+      keys,
+      'Expense',
+      expense.id,
+      trx
+    );
+  }
+
+  /**
+   * Handles unlinking all the unpresented keys of the edited expense.
+   * @param {ISaleInvoiceEditedPayload}
+   */
+  private async handleUnlinkUnpresentedKeysOnExpenseEdited({
+    tenantId,
+    expenseDTO,
+    expense,
+  }: IExpenseEventEditPayload) {
+    const keys = expenseDTO.attachments?.map((attachment) => attachment.key);
+    await this.unlinkAttachmentService.unlinkUnpresentedKeys(
+      tenantId,
+      keys,
+      'Expense',
+      expense.id
+    );
+  }
+
+  /**
+   * Handles linking all the presented keys of the edited expense.
+   * @param {ISaleInvoiceEditedPayload}
+   * @returns {Promise<void>}
+   */
+  private async handleLinkPresentedKeysOnExpenseEdited({
+    tenantId,
+    expenseDTO,
+    oldExpense,
+    trx,
+  }: IExpenseEventEditPayload) {
+    if (isEmpty(expenseDTO.attachments)) return;
+
+    const keys = expenseDTO.attachments?.map((attachment) => attachment.key);
+    await this.linkAttachmentService.bulkLink(
+      tenantId,
+      keys,
+      'Expense',
+      oldExpense.id,
+      trx
+    );
+  }
+
+  /**
+   * Unlink all attachments once the expense deleted.
+   * @param {ISaleInvoiceDeletedPayload}
+   * @returns {Promise<void>}
+   */
+  private async handleUnlinkAttachmentsOnExpenseDeleted({
+    tenantId,
+    oldExpense,
+    trx,
+  }: IExpenseDeletingPayload) {
+    await this.unlinkAttachmentService.unlinkAllModelKeys(
+      tenantId,
+      'Expense',
+      oldExpense.id,
+      trx
+    );
+  }
+}

packages/server/src/services/Attachments/events/AttachmentsOnManualJournals.ts

@@ -0,0 +1,157 @@
+import { Inject, Service } from 'typedi';
+import { isEmpty } from 'lodash';
+import {
+  IManualJournalCreatingPayload,
+  IManualJournalEventCreatedPayload,
+  IManualJournalEventDeletedPayload,
+  IManualJournalEventEditedPayload,
+} from '@/interfaces';
+import events from '@/subscribers/events';
+import { LinkAttachment } from '../LinkAttachment';
+import { ValidateAttachments } from '../ValidateAttachments';
+import { UnlinkAttachment } from '../UnlinkAttachment';
+
+@Service()
+export class AttachmentsOnManualJournals {
+  @Inject()
+  private linkAttachmentService: LinkAttachment;
+
+  @Inject()
+  private unlinkAttachmentService: UnlinkAttachment;
+
+  @Inject()
+  private validateDocuments: ValidateAttachments;
+
+  /**
+   * Constructor method.
+   */
+  public attach(bus) {
+    bus.subscribe(
+      events.manualJournals.onCreating,
+      this.validateAttachmentsOnManualJournalCreate.bind(this)
+    );
+    bus.subscribe(
+      events.manualJournals.onCreated,
+      this.handleAttachmentsOnManualJournalCreated.bind(this)
+    );
+    bus.subscribe(
+      events.manualJournals.onEdited,
+      this.handleUnlinkUnpresentedKeysOnManualJournalEdited.bind(this)
+    );
+    bus.subscribe(
+      events.manualJournals.onEdited,
+      this.handleLinkPresentedKeysOnManualJournalEdited.bind(this)
+    );
+    bus.subscribe(
+      events.manualJournals.onDeleting,
+      this.handleUnlinkAttachmentsOnManualJournalDeleted.bind(this)
+    );
+  }
+
+  /**
+   * Validates the attachment keys on creating manual journal.
+   * @param {IManualJournalCreatingPayload}
+   * @returns {Promise<void>}
+   */
+  private async validateAttachmentsOnManualJournalCreate({
+    manualJournalDTO,
+    tenantId,
+  }: IManualJournalCreatingPayload): Promise<void> {
+    if (isEmpty(manualJournalDTO.attachments)) {
+      return;
+    }
+    const documentKeys = manualJournalDTO?.attachments?.map((a) => a.key);
+
+    await this.validateDocuments.validate(tenantId, documentKeys);
+  }
+
+  /**
+   * Handles linking the attachments of the created manual journal.
+   * @param {IManualJournalEventCreatedPayload}
+   * @returns {Promise<void>}
+   */
+  private async handleAttachmentsOnManualJournalCreated({
+    tenantId,
+    manualJournalDTO,
+    manualJournal,
+    trx,
+  }: IManualJournalEventCreatedPayload): Promise<void> {
+    if (isEmpty(manualJournalDTO.attachments)) return;
+
+    const keys = manualJournalDTO.attachments?.map(
+      (attachment) => attachment.key
+    );
+    await this.linkAttachmentService.bulkLink(
+      tenantId,
+      keys,
+      'ManualJournal',
+      manualJournal.id,
+      trx
+    );
+  }
+
+  /**
+   * Handles unlinking all the unpresented keys of the edited manual journal.
+   * @param {ISaleInvoiceEditedPayload}
+   */
+  private async handleUnlinkUnpresentedKeysOnManualJournalEdited({
+    tenantId,
+    manualJournalDTO,
+    manualJournal,
+  }: IManualJournalEventEditedPayload) {
+    // if (isEmpty(saleInvoiceDTO.attachments)) return;
+
+    const keys = manualJournalDTO.attachments?.map(
+      (attachment) => attachment.key
+    );
+    await this.unlinkAttachmentService.unlinkUnpresentedKeys(
+      tenantId,
+      keys,
+      'SaleInvoice',
+      manualJournal.id
+    );
+  }
+
+  /**
+   * Handles linking all the presented keys of the edited manual journal.
+   * @param {ISaleInvoiceEditedPayload}
+   * @returns {Promise<void>}
+   */
+  private async handleLinkPresentedKeysOnManualJournalEdited({
+    tenantId,
+    manualJournalDTO,
+    oldManualJournal,
+    trx,
+  }: IManualJournalEventEditedPayload) {
+    if (isEmpty(manualJournalDTO.attachments)) return;
+
+    const keys = manualJournalDTO.attachments?.map(
+      (attachment) => attachment.key
+    );
+    await this.linkAttachmentService.bulkLink(
+      tenantId,
+      keys,
+      'ManualJournal',
+      oldManualJournal.id,
+      trx
+    );
+  }
+
+  /**
+   * Unlink all attachments once the manual journal deleted.
+   * @param {ISaleInvoiceDeletedPayload}
+   * @returns {Promise<void>}
+   */
+  private async handleUnlinkAttachmentsOnManualJournalDeleted({
+    tenantId,
+    oldManualJournal,
+    trx,
+  }: IManualJournalEventDeletedPayload) {
+    await this.unlinkAttachmentService.unlinkAllModelKeys(
+      tenantId,
+      'SaleInvoice',
+      oldManualJournal.id,
+      trx
+    );
+  }
+}

packages/server/src/services/Attachments/events/AttachmentsOnPaymentsMade.ts

@@ -0,0 +1,155 @@
+import { Inject, Service } from 'typedi';
+import { isEmpty } from 'lodash';
+import {
+  IBillPaymentCreatingPayload,
+  IBillPaymentDeletingPayload,
+  IBillPaymentEventCreatedPayload,
+  IBillPaymentEventEditedPayload,
+} from '@/interfaces';
+import events from '@/subscribers/events';
+import { LinkAttachment } from '../LinkAttachment';
+import { ValidateAttachments } from '../ValidateAttachments';
+import { UnlinkAttachment } from '../UnlinkAttachment';
+
+@Service()
+export class AttachmentsOnBillPayments{
+  @Inject()
+  private linkAttachmentService: LinkAttachment;
+
+  @Inject()
+  private unlinkAttachmentService: UnlinkAttachment;
+
+  @Inject()
+  private validateDocuments: ValidateAttachments;
+
+  /**
+   * Constructor method.
+   */
+  public attach(bus) {
+    bus.subscribe(
+      events.billPayment.onCreating,
+      this.validateAttachmentsOnBillPaymentCreate.bind(this)
+    );
+    bus.subscribe(
+      events.billPayment.onCreated,
+      this.handleAttachmentsOnBillPaymentCreated.bind(this)
+    );
+    bus.subscribe(
+      events.billPayment.onEdited,
+      this.handleUnlinkUnpresentedKeysOnBillPaymentEdited.bind(this)
+    );
+    bus.subscribe(
+      events.billPayment.onEdited,
+      this.handleLinkPresentedKeysOnBillPaymentEdited.bind(this)
+    );
+    bus.subscribe(
+      events.billPayment.onDeleting,
+      this.handleUnlinkAttachmentsOnBillPaymentDeleted.bind(this)
+    );
+  }
+
+  /**
+   * Validates the attachment keys on creating bill payment.
+   * @param {IBillPaymentCreatingPayload}
+   * @returns {Promise<void>}
+   */
+  private async validateAttachmentsOnBillPaymentCreate({
+    billPaymentDTO,
+    tenantId,
+  }: IBillPaymentCreatingPayload): Promise<void> {
+    if (isEmpty(billPaymentDTO.attachments)) {
+      return;
+    }
+    const documentKeys = billPaymentDTO?.attachments?.map((a) => a.key);
+
+    await this.validateDocuments.validate(tenantId, documentKeys);
+  }
+
+  /**
+   * Handles linking the attachments of the created bill payment.
+   * @param {IBillPaymentEventCreatedPayload}
+   * @returns {Promise<void>}
+   */
+  private async handleAttachmentsOnBillPaymentCreated({
+    tenantId,
+    billPaymentDTO,
+    billPayment,
+    trx,
+  }: IBillPaymentEventCreatedPayload): Promise<void> {
+    if (isEmpty(billPaymentDTO.attachments)) return;
+
+    const keys = billPaymentDTO.attachments?.map(
+      (attachment) => attachment.key
+    );
+    await this.linkAttachmentService.bulkLink(
+      tenantId,
+      keys,
+      'BillPayment',
+      billPayment.id,
+      trx
+    );
+  }
+
+  /**
+   * Handles unlinking all the unpresented keys of the edited bill payment.
+   * @param {IBillPaymentEventEditedPayload}
+   */
+  private async handleUnlinkUnpresentedKeysOnBillPaymentEdited({
+    tenantId,
+    billPaymentDTO,
+    oldBillPayment,
+  }: IBillPaymentEventEditedPayload) {
+    const keys = billPaymentDTO.attachments?.map(
+      (attachment) => attachment.key
+    );
+    await this.unlinkAttachmentService.unlinkUnpresentedKeys(
+      tenantId,
+      keys,
+      'BillPayment',
+      oldBillPayment.id
+    );
+  }
+
+  /**
+   * Handles linking all the presented keys of the edited bill payment.
+   * @param {IBillPaymentEventEditedPayload}
+   * @returns {Promise<void>}
+   */
+  private async handleLinkPresentedKeysOnBillPaymentEdited({
+    tenantId,
+    billPaymentDTO,
+    oldBillPayment,
+    trx,
+  }: IBillPaymentEventEditedPayload) {
+    if (isEmpty(billPaymentDTO.attachments)) return;
+
+    const keys = billPaymentDTO.attachments?.map(
+      (attachment) => attachment.key
+    );
+    await this.linkAttachmentService.bulkLink(
+      tenantId,
+      keys,
+      'BillPayment',
+      oldBillPayment.id,
+      trx
+    );
+  }
+
+  /**
+   * Unlink all attachments once the bill payment deleted.
+   * @param {IBillPaymentDeletingPayload}
+   * @returns {Promise<void>}
+   */
+  private async handleUnlinkAttachmentsOnBillPaymentDeleted({
+    tenantId,
+    oldBillPayment,
+    trx,
+  }: IBillPaymentDeletingPayload) {
+    await this.unlinkAttachmentService.unlinkAllModelKeys(
+      tenantId,
+      'BillPayment',
+      oldBillPayment.id,
+      trx
+    );
+  }
+}

packages/server/src/services/Attachments/events/AttachmentsOnPaymentsReceived.ts

@@ -0,0 +1,155 @@
+import { Inject, Service } from 'typedi';
+import { isEmpty } from 'lodash';
+import {
+  IPaymentReceiveCreatedPayload,
+  IPaymentReceiveCreatingPayload,
+  IPaymentReceiveDeletingPayload,
+  IPaymentReceiveEditedPayload,
+} from '@/interfaces';
+import events from '@/subscribers/events';
+import { LinkAttachment } from '../LinkAttachment';
+import { ValidateAttachments } from '../ValidateAttachments';
+import { UnlinkAttachment } from '../UnlinkAttachment';
+
+@Service()
+export class AttachmentsOnPaymentsReceived {
+  @Inject()
+  private linkAttachmentService: LinkAttachment;
+
+  @Inject()
+  private unlinkAttachmentService: UnlinkAttachment;
+
+  @Inject()
+  private validateDocuments: ValidateAttachments;
+
+  /**
+   * Constructor method.
+   */
+  public attach(bus) {
+    bus.subscribe(
+      events.paymentReceive.onCreating,
+      this.validateAttachmentsOnPaymentCreate.bind(this)
+    );
+    bus.subscribe(
+      events.paymentReceive.onCreated,
+      this.handleAttachmentsOnPaymentCreated.bind(this)
+    );
+    bus.subscribe(
+      events.paymentReceive.onEdited,
+      this.handleUnlinkUnpresentedKeysOnPaymentEdited.bind(this)
+    );
+    bus.subscribe(
+      events.paymentReceive.onEdited,
+      this.handleLinkPresentedKeysOnPaymentEdited.bind(this)
+    );
+    bus.subscribe(
+      events.paymentReceive.onDeleting,
+      this.handleUnlinkAttachmentsOnPaymentDelete.bind(this)
+    );
+  }
+
+  /**
+   * Validates the attachment keys on creating payment.
+   * @param {IPaymentReceiveCreatingPayload}
+   * @returns {Promise<void>}
+   */
+  private async validateAttachmentsOnPaymentCreate({
+    paymentReceiveDTO,
+    tenantId,
+  }: IPaymentReceiveCreatingPayload): Promise<void> {
+    if (isEmpty(paymentReceiveDTO.attachments)) {
+      return;
+    }
+    const documentKeys = paymentReceiveDTO?.attachments?.map((a) => a.key);
+
+    await this.validateDocuments.validate(tenantId, documentKeys);
+  }
+
+  /**
+   * Handles linking the attachments of the created payment.
+   * @param {IPaymentReceiveCreatedPayload}
+   * @returns {Promise<void>}
+   */
+  private async handleAttachmentsOnPaymentCreated({
+    tenantId,
+    paymentReceiveDTO,
+    paymentReceive,
+    trx,
+  }: IPaymentReceiveCreatedPayload): Promise<void> {
+    if (isEmpty(paymentReceiveDTO.attachments)) return;
+
+    const keys = paymentReceiveDTO.attachments?.map(
+      (attachment) => attachment.key
+    );
+    await this.linkAttachmentService.bulkLink(
+      tenantId,
+      keys,
+      'PaymentReceive',
+      paymentReceive.id,
+      trx
+    );
+  }
+
+  /**
+   * Handles unlinking all the unpresented keys of the edited payment.
+   * @param {IPaymentReceiveEditedPayload}
+   */
+  private async handleUnlinkUnpresentedKeysOnPaymentEdited({
+    tenantId,
+    paymentReceiveDTO,
+    oldPaymentReceive,
+  }: IPaymentReceiveEditedPayload) {
+    const keys = paymentReceiveDTO.attachments?.map(
+      (attachment) => attachment.key
+    );
+    await this.unlinkAttachmentService.unlinkUnpresentedKeys(
+      tenantId,
+      keys,
+      'PaymentReceive',
+      oldPaymentReceive.id
+    );
+  }
+
+  /**
+   * Handles linking all the presented keys of the edited payment.
+   * @param {IPaymentReceiveEditedPayload}
+   * @returns {Promise<void>}
+   */
+  private async handleLinkPresentedKeysOnPaymentEdited({
+    tenantId,
+    paymentReceiveDTO,
+    oldPaymentReceive,
+    trx,
+  }: IPaymentReceiveEditedPayload) {
+    if (isEmpty(paymentReceiveDTO.attachments)) return;
+
+    const keys = paymentReceiveDTO.attachments?.map(
+      (attachment) => attachment.key
+    );
+    await this.linkAttachmentService.bulkLink(
+      tenantId,
+      keys,
+      'PaymentReceive',
+      oldPaymentReceive.id,
+      trx
+    );
+  }
+
+  /**
+   * Unlink all attachments once the payment deleted.
+   * @param {ISaleInvoiceDeletedPayload}
+   * @returns {Promise<void>}
+   */
+  private async handleUnlinkAttachmentsOnPaymentDelete({
+    tenantId,
+    oldPaymentReceive,
+    trx,
+  }: IPaymentReceiveDeletingPayload) {
+    await this.unlinkAttachmentService.unlinkAllModelKeys(
+      tenantId,
+      'PaymentReceive',
+      oldPaymentReceive.id,
+      trx
+    );
+  }
+}

packages/server/src/services/Attachments/events/AttachmentsOnSaleEstimates.ts

@@ -0,0 +1,152 @@
+import { Inject, Service } from 'typedi';
+import { isEmpty } from 'lodash';
+import {
+  ISaleEstimateCreatedPayload,
+  ISaleEstimateCreatingPayload,
+  ISaleEstimateDeletingPayload,
+  ISaleEstimateEditedPayload,
+} from '@/interfaces';
+import events from '@/subscribers/events';
+import { LinkAttachment } from '../LinkAttachment';
+import { ValidateAttachments } from '../ValidateAttachments';
+import { UnlinkAttachment } from '../UnlinkAttachment';
+
+@Service()
+export class AttachmentsOnSaleEstimates {
+  @Inject()
+  private linkAttachmentService: LinkAttachment;
+
+  @Inject()
+  private unlinkAttachmentService: UnlinkAttachment;
+
+  @Inject()
+  private validateDocuments: ValidateAttachments;
+
+  /**
+   * Constructor method.
+   */
+  public attach(bus) {
+    bus.subscribe(
+      events.saleEstimate.onCreating,
+      this.validateAttachmentsOnSaleEstimateCreated.bind(this)
+    );
+    bus.subscribe(
+      events.saleEstimate.onCreated,
+      this.handleAttachmentsOnSaleEstimateCreated.bind(this)
+    );
+    bus.subscribe(
+      events.saleEstimate.onEdited,
+      this.handleUnlinkUnpresentedKeysOnSaleEstimateEdited.bind(this)
+    );
+    bus.subscribe(
+      events.saleEstimate.onEdited,
+      this.handleLinkPresentedKeysOnSaleEstimateEdited.bind(this)
+    );
+    bus.subscribe(
+      events.saleEstimate.onDeleting,
+      this.handleUnlinkAttachmentsOnSaleEstimateDelete.bind(this)
+    );
+  }
+
+  /**
+   * Validates the attachment keys on creating sale estimate.
+   * @param {ISaleEstimateCreatingPayload}
+   * @returns {Promise<void>}
+   */
+  private async validateAttachmentsOnSaleEstimateCreated({
+    estimateDTO,
+    tenantId,
+  }: ISaleEstimateCreatingPayload): Promise<void> {
+    if (isEmpty(estimateDTO.attachments)) {
+      return;
+    }
+    const documentKeys = estimateDTO?.attachments?.map((a) => a.key);
+
+    await this.validateDocuments.validate(tenantId, documentKeys);
+  }
+
+  /**
+   * Handles linking the attachments of the created sale estimate.
+   * @param {ISaleEstimateCreatedPayload}
+   * @returns {Promise<void>}
+   */
+  private async handleAttachmentsOnSaleEstimateCreated({
+    tenantId,
+    saleEstimateDTO,
+    saleEstimate,
+    trx,
+  }: ISaleEstimateCreatedPayload): Promise<void> {
+    if (isEmpty(saleEstimateDTO.attachments)) return;
+
+    const keys = saleEstimateDTO.attachments?.map(
+      (attachment) => attachment.key
+    );
+    await this.linkAttachmentService.bulkLink(
+      tenantId,
+      keys,
+      'SaleEstimate',
+      saleEstimate.id,
+      trx
+    );
+  }
+
+  /**
+   * Handles unlinking all the unpresented keys of the edited sale estimate.
+   * @param {ISaleEstimateEditedPayload}
+   */
+  private async handleUnlinkUnpresentedKeysOnSaleEstimateEdited({
+    tenantId,
+    estimateDTO,
+    oldSaleEstimate,
+  }: ISaleEstimateEditedPayload) {
+    const keys = estimateDTO.attachments?.map((attachment) => attachment.key);
+
+    await this.unlinkAttachmentService.unlinkUnpresentedKeys(
+      tenantId,
+      keys,
+      'SaleEstimate',
+      oldSaleEstimate.id
+    );
+  }
+
+  /**
+   * Handles linking all the presented keys of the edited sale estimate.
+   * @param {ISaleEstimateEditedPayload}
+   * @returns {Promise<void>}
+   */
+  private async handleLinkPresentedKeysOnSaleEstimateEdited({
+    tenantId,
+    estimateDTO,
+    oldSaleEstimate,
+    trx,
+  }: ISaleEstimateEditedPayload) {
+    if (isEmpty(estimateDTO.attachments)) return;
+
+    const keys = estimateDTO.attachments?.map((attachment) => attachment.key);
+    await this.linkAttachmentService.bulkLink(
+      tenantId,
+      keys,
+      'SaleEstimate',
+      oldSaleEstimate.id,
+      trx
+    );
+  }
+
+  /**
+   * Unlink all attachments once the estimate deleted.
+   * @param {ISaleEstimateDeletingPayload}
+   * @returns {Promise<void>}
+   */
+  private async handleUnlinkAttachmentsOnSaleEstimateDelete({
+    tenantId,
+    oldSaleEstimate,
+    trx,
+  }: ISaleEstimateDeletingPayload) {
+    await this.unlinkAttachmentService.unlinkAllModelKeys(
+      tenantId,
+      'SaleEstimate',
+      oldSaleEstimate.id,
+      trx
+    );
+  }
+}

packages/server/src/services/Attachments/events/AttachmentsOnSaleInvoice.ts

@@ -0,0 +1,157 @@
+import { Inject, Service } from 'typedi';
+import { isEmpty } from 'lodash';
+import {
+  ISaleInvoiceCreatedPayload,
+  ISaleInvoiceCreatingPaylaod,
+  ISaleInvoiceDeletePayload,
+  ISaleInvoiceEditedPayload,
+} from '@/interfaces';
+import events from '@/subscribers/events';
+import { LinkAttachment } from '../LinkAttachment';
+import { ValidateAttachments } from '../ValidateAttachments';
+import { UnlinkAttachment } from '../UnlinkAttachment';
+
+@Service()
+export class AttachmentsOnSaleInvoiceCreated {
+  @Inject()
+  private linkAttachmentService: LinkAttachment;
+
+  @Inject()
+  private unlinkAttachmentService: UnlinkAttachment;
+
+  @Inject()
+  private validateDocuments: ValidateAttachments;
+
+  /**
+   * Constructor method.
+   */
+  public attach(bus) {
+    bus.subscribe(
+      events.saleInvoice.onCreating,
+      this.validateAttachmentsOnSaleInvoiceCreate.bind(this)
+    );
+    bus.subscribe(
+      events.saleInvoice.onCreated,
+      this.handleAttachmentsOnSaleInvoiceCreated.bind(this)
+    );
+    bus.subscribe(
+      events.saleInvoice.onEdited,
+      this.handleUnlinkUnpresentedKeysOnInvoiceEdited.bind(this)
+    );
+    bus.subscribe(
+      events.saleInvoice.onEdited,
+      this.handleLinkPresentedKeysOnInvoiceEdited.bind(this)
+    );
+    bus.subscribe(
+      events.saleInvoice.onDeleting,
+      this.handleUnlinkAttachmentsOnInvoiceDeleted.bind(this)
+    );
+  }
+
+  /**
+   * Validates the attachment keys on creating sale invoice.
+   * @param {ISaleInvoiceCreatingPaylaod}
+   * @returns {Promise<void>}
+   */
+  private async validateAttachmentsOnSaleInvoiceCreate({
+    saleInvoiceDTO,
+    tenantId,
+  }: ISaleInvoiceCreatingPaylaod): Promise<void> {
+    if (isEmpty(saleInvoiceDTO.attachments)) {
+      return;
+    }
+    const documentKeys = saleInvoiceDTO?.attachments?.map((a) => a.key);
+
+    await this.validateDocuments.validate(tenantId, documentKeys);
+  }
+
+  /**
+   * Handles linking the attachments of the created sale invoice.
+   * @param {ISaleInvoiceCreatedPayload}
+   * @returns {Promise<void>}
+   */
+  private async handleAttachmentsOnSaleInvoiceCreated({
+    tenantId,
+    saleInvoiceDTO,
+    saleInvoice,
+    trx,
+  }: ISaleInvoiceCreatedPayload): Promise<void> {
+    if (isEmpty(saleInvoiceDTO.attachments)) return;
+
+    const keys = saleInvoiceDTO.attachments?.map(
+      (attachment) => attachment.key
+    );
+    await this.linkAttachmentService.bulkLink(
+      tenantId,
+      keys,
+      'SaleInvoice',
+      saleInvoice.id,
+      trx
+    );
+  }
+
+  /**
+   * Handles unlinking all the unpresented keys of the edited sale invoice.
+   * @param {ISaleInvoiceEditedPayload}
+   */
+  private async handleUnlinkUnpresentedKeysOnInvoiceEdited({
+    tenantId,
+    saleInvoiceDTO,
+    saleInvoice,
+  }: ISaleInvoiceEditedPayload) {
+    // if (isEmpty(saleInvoiceDTO.attachments)) return;
+
+    const keys = saleInvoiceDTO.attachments?.map(
+      (attachment) => attachment.key
+    );
+    await this.unlinkAttachmentService.unlinkUnpresentedKeys(
+      tenantId,
+      keys,
+      'SaleInvoice',
+      saleInvoice.id
+    );
+  }
+
+  /**
+   * Handles linking all the presented keys of the edited sale invoice.
+   * @param {ISaleInvoiceEditedPayload}
+   * @returns {Promise<void>}
+   */
+  private async handleLinkPresentedKeysOnInvoiceEdited({
+    tenantId,
+    saleInvoiceDTO,
+    oldSaleInvoice,
+    trx,
+  }: ISaleInvoiceEditedPayload) {
+    if (isEmpty(saleInvoiceDTO.attachments)) return;
+
+    const keys = saleInvoiceDTO.attachments?.map(
+      (attachment) => attachment.key
+    );
+    await this.linkAttachmentService.bulkLink(
+      tenantId,
+      keys,
+      'SaleInvoice',
+      oldSaleInvoice.id,
+      trx
+    );
+  }
+
+  /**
+   * Unlink all attachments once the invoice deleted.
+   * @param {ISaleInvoiceDeletedPayload}
+   * @returns {Promise<void>}
+   */
+  private async handleUnlinkAttachmentsOnInvoiceDeleted({
+    tenantId,
+    saleInvoice,
+    trx,
+  }: ISaleInvoiceDeletePayload) {
+    await this.unlinkAttachmentService.unlinkAllModelKeys(
+      tenantId,
+      'SaleInvoice',
+      saleInvoice.id,
+      trx
+    );
+  }
+}

packages/server/src/services/Attachments/events/AttachmentsOnSaleReceipts.ts

@@ -0,0 +1,155 @@
+import { Inject, Service } from 'typedi';
+import { isEmpty } from 'lodash';
+import {
+  ISaleReceiptCreatedPayload,
+  ISaleReceiptCreatingPayload,
+  ISaleReceiptDeletingPayload,
+  ISaleReceiptEditedPayload,
+} from '@/interfaces';
+import events from '@/subscribers/events';
+import { LinkAttachment } from '../LinkAttachment';
+import { ValidateAttachments } from '../ValidateAttachments';
+import { UnlinkAttachment } from '../UnlinkAttachment';
+
+@Service()
+export class AttachmentsOnSaleReceipt {
+  @Inject()
+  private linkAttachmentService: LinkAttachment;
+
+  @Inject()
+  private unlinkAttachmentService: UnlinkAttachment;
+
+  @Inject()
+  private validateDocuments: ValidateAttachments;
+
+  /**
+   * Constructor method.
+   */
+  public attach(bus) {
+    bus.subscribe(
+      events.saleReceipt.onCreating,
+      this.validateAttachmentsOnSaleInvoiceCreate.bind(this)
+    );
+    bus.subscribe(
+      events.saleReceipt.onCreated,
+      this.handleAttachmentsOnSaleInvoiceCreated.bind(this)
+    );
+    bus.subscribe(
+      events.saleReceipt.onEdited,
+      this.handleUnlinkUnpresentedKeysOnInvoiceEdited.bind(this)
+    );
+    bus.subscribe(
+      events.saleReceipt.onEdited,
+      this.handleLinkPresentedKeysOnInvoiceEdited.bind(this)
+    );
+    bus.subscribe(
+      events.saleReceipt.onDeleting,
+      this.handleUnlinkAttachmentsOnReceiptDeleted.bind(this)
+    );
+  }
+
+  /**
+   * Validates the attachment keys on creating sale receipt.
+   * @param {ISaleReceiptCreatingPayload}
+   * @returns {Promise<void>}
+   */
+  private async validateAttachmentsOnSaleInvoiceCreate({
+    saleReceiptDTO,
+    tenantId,
+  }: ISaleReceiptCreatingPayload): Promise<void> {
+    if (isEmpty(saleReceiptDTO.attachments)) {
+      return;
+    }
+    const documentKeys = saleReceiptDTO?.attachments?.map((a) => a.key);
+
+    await this.validateDocuments.validate(tenantId, documentKeys);
+  }
+
+  /**
+   * Handles linking the attachments of the created sale receipt.
+   * @param {ISaleReceiptCreatedPayload}
+   * @returns {Promise<void>}
+   */
+  private async handleAttachmentsOnSaleInvoiceCreated({
+    tenantId,
+    saleReceiptDTO,
+    saleReceipt,
+    trx,
+  }: ISaleReceiptCreatedPayload): Promise<void> {
+    if (isEmpty(saleReceiptDTO.attachments)) return;
+
+    const keys = saleReceiptDTO.attachments?.map(
+      (attachment) => attachment.key
+    );
+    await this.linkAttachmentService.bulkLink(
+      tenantId,
+      keys,
+      'SaleReceipt',
+      saleReceipt.id,
+      trx
+    );
+  }
+
+  /**
+   * Handles unlinking all the unpresented keys of the edited sale receipt.
+   * @param {ISaleReceiptEditedPayload}
+   */
+  private async handleUnlinkUnpresentedKeysOnInvoiceEdited({
+    tenantId,
+    saleReceiptDTO,
+    saleReceipt,
+  }: ISaleReceiptEditedPayload) {
+    const keys = saleReceiptDTO.attachments?.map(
+      (attachment) => attachment.key
+    );
+    await this.unlinkAttachmentService.unlinkUnpresentedKeys(
+      tenantId,
+      keys,
+      'SaleReceipt',
+      saleReceipt.id
+    );
+  }
+
+  /**
+   * Handles linking all the presented keys of the edited sale receipt.
+   * @param {ISaleReceiptEditedPayload}
+   * @returns {Promise<void>}
+   */
+  private async handleLinkPresentedKeysOnInvoiceEdited({
+    tenantId,
+    saleReceiptDTO,
+    oldSaleReceipt,
+    trx,
+  }: ISaleReceiptEditedPayload) {
+    if (isEmpty(saleReceiptDTO.attachments)) return;
+
+    const keys = saleReceiptDTO.attachments?.map(
+      (attachment) => attachment.key
+    );
+    await this.linkAttachmentService.bulkLink(
+      tenantId,
+      keys,
+      'SaleReceipt',
+      oldSaleReceipt.id,
+      trx
+    );
+  }
+
+  /**
+   * Unlink all attachments once the receipt deleted.
+   * @param {ISaleReceiptDeletingPayload}
+   * @returns {Promise<void>}
+   */
+  private async handleUnlinkAttachmentsOnReceiptDeleted({
+    tenantId,
+    oldSaleReceipt,
+    trx,
+  }: ISaleReceiptDeletingPayload) {
+    await this.unlinkAttachmentService.unlinkAllModelKeys(
+      tenantId,
+      'SaleReceipt',
+      oldSaleReceipt.id,
+      trx
+    );
+  }
+}

packages/server/src/services/Attachments/events/AttachmentsOnVendorCredits.ts

@@ -0,0 +1,155 @@
+import { Inject, Service } from 'typedi';
+import { isEmpty } from 'lodash';
+import {
+  IVendorCreditCreatedPayload,
+  IVendorCreditCreatingPayload,
+  IVendorCreditDeletingPayload,
+  IVendorCreditEditedPayload,
+} from '@/interfaces';
+import events from '@/subscribers/events';
+import { LinkAttachment } from '../LinkAttachment';
+import { ValidateAttachments } from '../ValidateAttachments';
+import { UnlinkAttachment } from '../UnlinkAttachment';
+
+@Service()
+export class AttachmentsOnVendorCredits {
+  @Inject()
+  private linkAttachmentService: LinkAttachment;
+
+  @Inject()
+  private unlinkAttachmentService: UnlinkAttachment;
+
+  @Inject()
+  private validateDocuments: ValidateAttachments;
+
+  /**
+   * Constructor method.
+   */
+  public attach(bus) {
+    bus.subscribe(
+      events.saleInvoice.onCreating,
+      this.validateAttachmentsOnVendorCreditCreate.bind(this)
+    );
+    bus.subscribe(
+      events.saleInvoice.onCreated,
+      this.handleAttachmentsOnVendorCreditCreated.bind(this)
+    );
+    bus.subscribe(
+      events.saleInvoice.onEdited,
+      this.handleUnlinkUnpresentedKeysOnVendorCreditEdited.bind(this)
+    );
+    bus.subscribe(
+      events.saleInvoice.onEdited,
+      this.handleLinkPresentedKeysOnVendorCreditEdited.bind(this)
+    );
+    bus.subscribe(
+      events.saleInvoice.onDeleting,
+      this.handleUnlinkAttachmentsOnVendorCreditDeleted.bind(this)
+    );
+  }
+
+  /**
+   * Validates the attachment keys on creating vendor credit.
+   * @param {IVendorCreditCreatingPayload}
+   * @returns {Promise<void>}
+   */
+  private async validateAttachmentsOnVendorCreditCreate({
+    vendorCreditCreateDTO,
+    tenantId,
+  }: IVendorCreditCreatingPayload): Promise<void> {
+    if (isEmpty(vendorCreditCreateDTO.attachments)) {
+      return;
+    }
+    const documentKeys = vendorCreditCreateDTO?.attachments?.map((a) => a.key);
+
+    await this.validateDocuments.validate(tenantId, documentKeys);
+  }
+
+  /**
+   * Handles linking the attachments of the created vendor credit.
+   * @param {IVendorCreditCreatedPayload}
+   * @returns {Promise<void>}
+   */
+  private async handleAttachmentsOnVendorCreditCreated({
+    tenantId,
+    vendorCreditCreateDTO,
+    vendorCredit,
+    trx,
+  }: IVendorCreditCreatedPayload): Promise<void> {
+    if (isEmpty(vendorCreditCreateDTO.attachments)) return;
+
+    const keys = vendorCreditCreateDTO.attachments?.map(
+      (attachment) => attachment.key
+    );
+    await this.linkAttachmentService.bulkLink(
+      tenantId,
+      keys,
+      'VendorCredit',
+      vendorCredit.id,
+      trx
+    );
+  }
+
+  /**
+   * Handles unlinking all the unpresented keys of the edited vendor credit.
+   * @param {IVendorCreditEditedPayload}
+   */
+  private async handleUnlinkUnpresentedKeysOnVendorCreditEdited({
+    tenantId,
+    vendorCreditDTO,
+    oldVendorCredit,
+  }: IVendorCreditEditedPayload) {
+    const keys = vendorCreditDTO.attachments?.map(
+      (attachment) => attachment.key
+    );
+    await this.unlinkAttachmentService.unlinkUnpresentedKeys(
+      tenantId,
+      keys,
+      'VendorCredit',
+      oldVendorCredit.id
+    );
+  }
+
+  /**
+   * Handles linking all the presented keys of the edited vendor credit.
+   * @param {IVendorCreditEditedPayload}
+   * @returns {Promise<void>}
+   */
+  private async handleLinkPresentedKeysOnVendorCreditEdited({
+    tenantId,
+    vendorCreditDTO,
+    oldVendorCredit,
+    trx,
+  }: IVendorCreditEditedPayload) {
+    if (isEmpty(vendorCreditDTO.attachments)) return;
+
+    const keys = vendorCreditDTO.attachments?.map(
+      (attachment) => attachment.key
+    );
+    await this.linkAttachmentService.bulkLink(
+      tenantId,
+      keys,
+      'VendorCredit',
+      oldVendorCredit.id,
+      trx
+    );
+  }
+
+  /**
+   * Unlink all attachments once the vendor credit deleted.
+   * @param {IVendorCreditDeletingPayload}
+   * @returns {Promise<void>}
+   */
+  private async handleUnlinkAttachmentsOnVendorCreditDeleted({
+    tenantId,
+    oldVendorCredit,
+    trx,
+  }: IVendorCreditDeletingPayload) {
+    await this.unlinkAttachmentService.unlinkAllModelKeys(
+      tenantId,
+      'VendorCredit',
+      oldVendorCredit.id,
+      trx
+    );
+  }
+}

packages/server/src/services/CreditNotes/CreditNotes.ts

@@ -57,7 +57,7 @@ export default class BaseCreditNotes {
       autoNextNumber;
 
     const initialDTO = {
-      ...omit(creditNoteDTO, ['open']),
+      ...omit(creditNoteDTO, ['open', 'attachments']),
       creditNoteNumber,
       amount,
       currencyCode: customerCurrencyCode,

packages/server/src/services/Expenses/CRUD/CreateExpense.ts

@@ -123,6 +123,7 @@ export class CreateExpense {
           tenantId,
           expenseId: expense.id,
           authorizedUser,
+          expenseDTO,
           expense,
           trx,
         } as IExpenseCreatedPayload);

packages/server/src/services/Expenses/CRUD/ExpenseDTOTransformer.ts

@@ -54,7 +54,7 @@ export class ExpenseDTOTransformer {
 
     const initialDTO = {
       categories: [],
-      ...omit(expenseDTO, ['publish']),
+      ...omit(expenseDTO, ['publish', 'attachments']),
       totalAmount,
       landedCostAmount,
       paymentDate: moment(expenseDTO.paymentDate).toMySqlDateTime(),

packages/server/src/services/Expenses/CRUD/ExpenseTransformer.ts

@@ -2,6 +2,7 @@ import { Transformer } from '@/lib/Transformer/Transformer';
 import { formatNumber } from 'utils';
 import { IExpense } from '@/interfaces';
 import { ExpenseCategoryTransformer } from './ExpenseCategoryTransformer';
+import { AttachmentTransformer } from '@/services/Attachments/AttachmentTransformer';
 
 export class ExpenseTransfromer extends Transformer {
   /**
@@ -15,6 +16,7 @@ export class ExpenseTransfromer extends Transformer {
       'formattedAllocatedCostAmount',
       'formattedDate',
       'categories',
+      'attachments',
     ];
   };
 
@@ -70,4 +72,13 @@ export class ExpenseTransfromer extends Transformer {
       currencyCode: expense.currencyCode,
     });
   };
+
+  /**
+   * Retrieves the sale invoice attachments.
+   * @param {ISaleInvoice} invoice
+   * @returns
+   */
+  protected attachments = (expense: IExpense) => {
+    return this.item(expense.attachments, new AttachmentTransformer());
+  };
 }

packages/server/src/services/Expenses/CRUD/GetExpense.ts

@@ -29,6 +29,7 @@ export class GetExpense {
       .withGraphFetched('categories.expenseAccount')
       .withGraphFetched('paymentAccount')
       .withGraphFetched('branch')
+      .withGraphFetched('attachments')
       .throwIfNotFound();
 
     // Transformes expense model to POJO.

packages/server/src/services/ManualJournals/CreateManualJournal.ts

@@ -12,7 +12,7 @@ import {
 } from '@/interfaces';
 import TenancyService from '@/services/Tenancy/TenancyService';
 import events from '@/subscribers/events';
-import { Tenant, TenantMetadata } from '@/system/models';
+import { TenantMetadata } from '@/system/models';
 import UnitOfWork from '@/services/UnitOfWork';
 import { EventPublisher } from '@/lib/EventPublisher/EventPublisher';
 import { CommandManualJournalValidators } from './CommandManualJournalValidators';
@@ -59,7 +59,7 @@ export class CreateManualJournalService {
     const journalNumber = manualJournalDTO.journalNumber || autoNextNumber;
 
     const initialDTO = {
-      ...omit(manualJournalDTO, ['publish']),
+      ...omit(manualJournalDTO, ['publish', 'attachments']),
       ...(manualJournalDTO.publish
         ? { publishedAt: moment().toMySqlDateTime() }
         : {}),
@@ -173,6 +173,7 @@ export class CreateManualJournalService {
           tenantId,
           manualJournal,
           manualJournalId: manualJournal.id,
+          manualJournalDTO,
           trx,
         } as IManualJournalEventCreatedPayload);
 

packages/server/src/services/Purchases/BillPayments/CreateBillPayment.ts

@@ -118,6 +118,7 @@ export class CreateBillPayment {
           tenantId,
           billPayment,
           billPaymentId: billPayment.id,
+          billPaymentDTO,
           trx,
         } as IBillPaymentEventCreatedPayload);
 

packages/server/src/services/Purchases/BillPayments/EditBillPayment.ts

@@ -137,6 +137,7 @@ export class EditBillPayment {
         billPaymentId,
         billPayment,
         oldBillPayment,
+        billPaymentDTO,
         trx,
       } as IBillPaymentEventEditedPayload);
 

packages/server/src/services/Purchases/Bills/BillDTOTransformer.ts

@@ -96,7 +96,7 @@ export class BillDTOTransformer {
     )(asyncEntries);
 
     const initialDTO = {
-      ...formatDateFields(omit(billDTO, ['open', 'entries']), [
+      ...formatDateFields(omit(billDTO, ['open', 'entries', 'attachments']), [
         'billDate',
         'dueDate',
       ]),

packages/server/src/services/Purchases/Bills/CreateBill.ts

@@ -110,6 +110,7 @@ export class CreateBill {
           tenantId,
           bill,
           billId: bill.id,
+          billDTO,
           trx,
         } as IBillCreatedPayload);
 

packages/server/src/services/Purchases/Bills/EditBill.ts

@@ -148,6 +148,7 @@ export class EditBill {
         billId,
         oldBill,
         bill,
+        billDTO,
         trx,
       } as IBillEditedPayload);
 

packages/server/src/services/Purchases/VendorCredits/EditVendorCredit.ts

@@ -93,6 +93,7 @@ export default class EditVendorCredit extends BaseVendorCredit {
         oldVendorCredit,
         vendorCredit,
         vendorCreditId,
+        vendorCreditDTO,
         trx,
       } as IVendorCreditEditedPayload);
 

packages/server/src/services/Sales/Estimates/EditSaleEstimate.ts

@@ -114,6 +114,7 @@ export class EditSaleEstimate {
         estimateId,
         saleEstimate,
         oldSaleEstimate,
+        estimateDTO,
         trx,
       } as ISaleEstimateEditedPayload);
 

packages/server/src/services/Sales/Estimates/SaleEstimateDTOTransformer.ts

@@ -58,10 +58,10 @@ export class SaleEstimateDTOTransformer {
 
     const initialDTO = {
       amount,
-      ...formatDateFields(omit(estimateDTO, ['delivered', 'entries']), [
+      ...formatDateFields(
-        'estimateDate',
+        omit(estimateDTO, ['delivered', 'entries', 'attachments']),
-        'expirationDate',
+        ['estimateDate', 'expirationDate']
-      ]),
+      ),
       currencyCode: paymentCustomer.currencyCode,
       exchangeRate: estimateDTO.exchangeRate || 1,
       ...(estimateNumber ? { estimateNumber } : {}),

packages/server/src/services/Sales/Invoices/CommandSaleInvoiceDTOTransformer.ts

@@ -86,7 +86,12 @@ export class CommandSaleInvoiceDTOTransformer {
 
     const initialDTO = {
       ...formatDateFields(
-        omit(saleInvoiceDTO, ['delivered', 'entries', 'fromEstimateId']),
+        omit(saleInvoiceDTO, [
+          'delivered',
+          'entries',
+          'fromEstimateId',
+          'attachments',
+        ]),
         ['invoiceDate', 'dueDate']
       ),
       // Avoid rewrite the deliver date in edit mode when already published.

packages/server/src/services/Sales/Invoices/GetSaleInvoice.ts

@@ -34,7 +34,8 @@ export class GetSaleInvoice {
       .withGraphFetched('entries.tax')
       .withGraphFetched('customer')
       .withGraphFetched('branch')
-      .withGraphFetched('taxes.taxRate');
+      .withGraphFetched('taxes.taxRate')
+      .withGraphFetched('attachments');
 
     // Validates the given sale invoice existance.
     this.validators.validateInvoiceExistance(saleInvoice);

packages/server/src/services/Sales/Invoices/SaleInvoiceTransformer.ts

@@ -2,6 +2,7 @@ import { Transformer } from '@/lib/Transformer/Transformer';
 import { formatNumber } from 'utils';
 import { SaleInvoiceTaxEntryTransformer } from './SaleInvoiceTaxEntryTransformer';
 import { ItemEntryTransformer } from './ItemEntryTransformer';
+import { AttachmentTransformer } from '@/services/Attachments/AttachmentTransformer';
 
 export class SaleInvoiceTransformer extends Transformer {
   /**
@@ -25,6 +26,7 @@ export class SaleInvoiceTransformer extends Transformer {
       'totalLocalFormatted',
       'taxes',
       'entries',
+      'attachments',
     ];
   };
 
@@ -190,4 +192,13 @@ export class SaleInvoiceTransformer extends Transformer {
       currencyCode: invoice.currencyCode,
     });
   };
+
+  /**
+   * Retrieves the sale invoice attachments.
+   * @param {ISaleInvoice} invoice
+   * @returns
+   */
+  protected attachments = (invoice) => {
+    return this.item(invoice.attachments, new AttachmentTransformer());
+  };
 }

packages/server/src/services/Sales/PaymentReceives/CreatePaymentReceive.ts

@@ -110,6 +110,7 @@ export class CreatePaymentReceive {
           tenantId,
           paymentReceive,
           paymentReceiveId: paymentReceive.id,
+          paymentReceiveDTO,
           authorizedUser,
           trx,
         } as IPaymentReceiveCreatedPayload);