fix: sync contacts balance with journal entries.

fix: edit invoice amount that has payment transactions.

server/src/services/Accounting/JournalContacts.ts

@@ -0,0 +1,74 @@
+import async from 'async';
+
+export default class JournalContacts {
+  saveContactBalanceQueue: any;
+  contactsBalanceTable: {
+    [key: number]: { credit: number; debit: number };
+  } = {};
+
+  constructor(journal) {
+    this.journal = journal;
+    this.saveContactBalanceQueue = async.queue(
+      this.saveContactBalanceChangeTask.bind(this),
+      10
+    );
+  }
+  /**
+   * Sets the contact balance change.
+   */
+  private getContactsBalanceChanges(entry) {
+    if (!entry.contactId) {
+      return;
+    }
+    const change = {
+      debit: entry.debit,
+      credit: entry.credit,
+    };
+    if (!this.contactsBalanceTable[entry.contactId]) {
+      this.contactsBalanceTable[entry.contactId] = { credit: 0, debit: 0 };
+    }
+    if (change.credit) {
+      this.contactsBalanceTable[entry.contactId].credit += change.credit;
+    }
+    if (change.debit) {
+      this.contactsBalanceTable[entry.contactId].debit += change.debit;
+    }
+  }
+
+  /**
+   * Save contacts balance change.
+   */
+  saveContactsBalance() {
+    const balanceChanges = Object.entries(
+      this.contactsBalanceTable
+    ).map(([contactId, { credit, debit }]) => ({ contactId, credit, debit }));
+
+    return this.saveContactBalanceQueue.pushAsync(balanceChanges);
+  }
+
+  /**
+   * Saves contact balance change task.
+   * @param {number} contactId - Contact id.
+   * @param {number} credit - Credit amount.
+   * @param {number} debit - Debit amount.
+   */
+  async saveContactBalanceChangeTask({ contactId, credit, debit }, callback) {
+    const { contactRepository } = this.repositories;
+
+    const contact = await contactRepository.findOneById(contactId);
+    let balanceChange = 0;
+
+    if (contact.contactNormal === 'credit') {
+      balanceChange += credit - debit;
+    } else {
+      balanceChange += debit - credit;
+    }
+    // Contact change balance.
+    await contactRepository.changeNumber(
+      { id: contactId },
+      'balance',
+      balanceChange
+    );
+    callback();
+  }
+}