feat(nestjs): migrate to NestJS

packages/server/src/libs/migration-seed/FsMigrations.ts

@@ -0,0 +1,100 @@
+import * as path from 'path';
+import * as fs from 'fs';
+import { sortBy } from 'lodash';
+import { promisify } from 'util';
+import { MigrateItem } from './interfaces';
+import { importWebpackSeedModule } from './Utils';
+import { DEFAULT_LOAD_EXTENSIONS } from './constants';
+import { filterMigrations } from './MigrateUtils';
+
+class FsMigrations {
+  private sortDirsSeparately: boolean;
+  private migrationsPaths: string[];
+  private loadExtensions: string[];
+
+  /**
+   * Constructor method.
+   * @param migrationDirectories
+   * @param sortDirsSeparately
+   * @param loadExtensions
+   */
+  constructor(
+    migrationDirectories: string[],
+    sortDirsSeparately: boolean,
+    loadExtensions: string[],
+  ) {
+    this.sortDirsSeparately = sortDirsSeparately;
+
+    if (!Array.isArray(migrationDirectories)) {
+      migrationDirectories = [migrationDirectories];
+    }
+    this.migrationsPaths = migrationDirectories;
+    this.loadExtensions = loadExtensions || DEFAULT_LOAD_EXTENSIONS;
+  }
+
+  /**
+   * Gets the migration names
+   * @returns Promise<MigrateItem[]>
+   */
+  public getMigrations(loadExtensions = null): Promise<MigrateItem[]> {
+    // Get a list of files in all specified migration directories
+    const readMigrationsPromises = this.migrationsPaths.map((configDir) => {
+      const absoluteDir = path.resolve(process.cwd(), configDir);
+      const readdir = promisify(fs.readdir);
+
+      return readdir(absoluteDir).then((files) => ({
+        files,
+        configDir,
+        absoluteDir,
+      }));
+    });
+
+    return Promise.all(readMigrationsPromises).then((allMigrations) => {
+      const migrations = allMigrations.reduce((acc, migrationDirectory) => {
+        // When true, files inside the folder should be sorted
+        if (this.sortDirsSeparately) {
+          migrationDirectory.files = migrationDirectory.files.sort();
+        }
+        migrationDirectory.files.forEach((file) =>
+          acc.push({ file, directory: migrationDirectory.configDir }),
+        );
+        return acc;
+      }, []);
+
+      // If true we have already sorted the migrations inside the folders
+      // return the migrations fully qualified
+      if (this.sortDirsSeparately) {
+        return filterMigrations(
+          this,
+          migrations,
+          loadExtensions || this.loadExtensions,
+        );
+      }
+      return filterMigrations(
+        this,
+        sortBy(migrations, 'file'),
+        loadExtensions || this.loadExtensions,
+      );
+    });
+  }
+
+  /**
+   * Retrieve the file name from given migrate item.
+   * @param {MigrateItem} migration
+   * @returns {string}
+   */
+  public getMigrationName(migration: MigrateItem): string {
+    return migration.file;
+  }
+
+  /**
+   * Retrieve the migrate file content from given migrate item.
+   * @param {MigrateItem} migration
+   * @returns {string}
+   */
+  public getMigration(migration: MigrateItem): string {
+    return importWebpackSeedModule(migration.file.replace('.ts', ''));
+  }
+}
+
+export { DEFAULT_LOAD_EXTENSIONS, FsMigrations };