🌟 Data migration tool from nextcloud (#299)

- created server configuration
 - implemented downloading files from nextcloud to a local directory
 - build of the docker image added to the GutHub workflow
 - Twake client added
 - Creating user in Twake Drive from ldap
 - Ldap client with ldapsearch(TODO make it work with ldapjs)
 - Jest debug tests

tdrive/backend/utils/nextcloud-migration/src/nextcloud_migration.ts

@@ -0,0 +1,102 @@
+import { exec } from 'child_process';
+import fs from 'fs';
+import { LdapUser } from './shell_ldap_user.js';
+import { User } from './ldap_user.js';
+import { TwakeDriveClient } from './twake_client.js';
+
+export type NextcloudMigrationConfiguration = {
+  ldap: {
+    baseDn: string,
+    url: string,
+  },
+  drive: {
+    url: string,
+    credentials: {
+      appId: string,
+      secret: string,
+    }
+  },
+  tmpDir: string,
+  nextcloudUrl: string
+}
+
+export class NextcloudMigration {
+
+  private config: NextcloudMigrationConfiguration;
+
+  private ldap: LdapUser;
+
+  private driveClient: TwakeDriveClient;
+
+  constructor(config: NextcloudMigrationConfiguration) {
+    this.config = config;
+    this.ldap = new LdapUser(config.ldap);
+    this.driveClient = new TwakeDriveClient(this.config.drive);
+  }
+
+  async migrate(username: string, password: string) {
+    const dir = this.createTmpDir(username);
+    try {
+      // await this.download(username, password, dir);
+      const user = await this.getLDAPUser(username);
+      //create user if needed Twake Drive
+      await this.driveClient.createUser(user);
+      //upload files to the Twake Drive
+    } catch (e) {
+      console.error('Error downloading files from next cloud', e);
+      throw e;
+    } finally {
+      this.deleteDir(dir);
+    }
+  }
+
+  async download(username: string, password: string, dir: string) {
+    return new Promise((resolve, reject) => {
+      let cmd = `nextcloudcmd -s --non-interactive -u '${username}' -p '${password}' ${dir} ${this.config.nextcloudUrl}`;
+      console.log('Start downloading data from Nextcloud');
+      exec(cmd, (error, stdout, stderr) => {
+        if (stderr) {
+          console.log('ERROR: ' + stderr);
+        }
+        if (stdout) {
+          console.log('OUT: ' + stdout);
+        }
+        if (error) {
+          console.log(`ERROR running sync for the user: ${error.message}`);
+          reject(error.message);
+        } else {
+          console.log('Download finished');
+          resolve('');
+        }
+      });
+    });
+  }
+
+  async getLDAPUser(username: string): Promise<User> {
+    const user = await this.ldap.find(username);
+    if (!user.email) {
+      throw new Error(`User ${username} not found`);
+    }
+    return user;
+  }
+
+  createTmpDir(username: string) {
+    console.log('Creating tmp directory for the user data');
+    const dir = this.config.tmpDir + '/' + username + '_' + new Date().getTime();
+    if (!fs.existsSync(dir)) {
+      console.log(`Creating directory ${dir} ...`);
+      fs.mkdirSync(dir);
+      console.log(`Directory ${dir} created`);
+    } else {
+      this.deleteDir(dir);
+    }
+    return dir;
+  }
+
+  deleteDir(dir: string) {
+    console.log(`Deleting directory ${dir} ...`);
+    fs.rmSync(dir, { recursive: true, force: true });
+    console.log(`Directory ${dir} deleted`);
+  }
+
+}