adding sqlite support, removing mysql required dependency

backend/model/sql/SharingManager.ts

@@ -0,0 +1,58 @@
+import {ISharingManager} from "../interfaces/ISharingManager";
+import {SharingDTO} from "../../../common/entities/SharingDTO";
+import {SQLConnection} from "./SQLConnection";
+import {SharingEntity} from "./enitites/SharingEntity";
+import {Config} from "../../../common/config/private/Config";
+import {PasswordHelper} from "../PasswordHelper";
+
+export class SharingManager implements ISharingManager {
+
+  async findOne(filter: any): Promise<SharingDTO> {
+    await this.removeExpiredLink();
+    const connection = await SQLConnection.getConnection();
+    return await connection.getRepository(SharingEntity).findOne(filter);
+  }
+
+  async createSharing(sharing: SharingDTO): Promise<SharingDTO> {
+    await this.removeExpiredLink();
+    const connection = await SQLConnection.getConnection();
+    if (sharing.password) {
+      sharing.password = PasswordHelper.cryptPassword(sharing.password);
+    }
+    return await connection.getRepository(SharingEntity).persist(sharing);
+
+
+  }
+
+  async updateSharing(inSharing: SharingDTO): Promise<SharingDTO> {
+    const connection = await SQLConnection.getConnection();
+
+    let sharing = await connection.getRepository(SharingEntity).findOne({
+      id: inSharing.id,
+      creator: inSharing.creator.id,
+      path: inSharing.path
+    });
+
+    if (sharing.timeStamp < Date.now() - Config.Server.sharing.updateTimeout) {
+      throw "Sharing is locked, can't update anymore"
+    }
+
+    sharing.password = inSharing.password;
+    sharing.includeSubfolders = inSharing.includeSubfolders;
+    sharing.expires = inSharing.expires;
+
+    return await connection.getRepository(SharingEntity).persist(sharing);
+  }
+
+  private async removeExpiredLink() {
+    const connection = await SQLConnection.getConnection();
+    return connection
+      .getRepository(SharingEntity)
+      .createQueryBuilder("share")
+      .where("expires < :now", {now: Date.now()})
+      .delete()
+      .execute();
+  }
+
+
+}