Transport controller and file model (#42)

* Transport controller and file model

* Use randomBytes intead of pseudoRandomBytes

* Cover all lines with tests

* Update code style

* Update code style

* View for image block

* Fix serving static files

* Mkdir -p for uploads dirs

* Add default secret param

* Add image Tool

* Update src/utils/objects.js

Co-Authored-By: talyguryn <vitalik7tv@yandex.ru>

* Use vars for image tool colors

* Revert var

* Remove --color-gray-border var

* Update src/controllers/transport.js

Co-Authored-By: talyguryn <vitalik7tv@yandex.ru>

* Add mp4 support for Image Tool

src/models/file.js

@@ -0,0 +1,157 @@
+const { files: filesDb } = require('../utils/database/index');
+
+/**
+ * @typedef {Object} FileData
+ *
+ * @property {string} _id - file id
+ * @property {string} name - original file name
+ * @property {string} filename - name of uploaded file
+ * @property {string} path - path to uploaded file
+ * @property {string} mimetype - file MIME type
+ * @property {number} size - size of the file in
+ */
+
+/**
+ * @class File
+ * @class File model
+ *
+ * @property {string} _id - file id
+ * @property {string} name - original file name
+ * @property {string} filename - name of uploaded file
+ * @property {string} path - path to uploaded file
+ * @property {string} mimetype - file MIME type
+ * @property {number} size - size of the file in
+ */
+class File {
+  /**
+   * Find and return model of file with given id
+   * @param {string} _id - file id
+   * @returns {Promise<File>}
+   */
+  static async get(_id) {
+    const data = await filesDb.findOne({ _id });
+
+    return new File(data);
+  }
+
+  /**
+   * Find and return model of file with given id
+   * @param {string} filename - uploaded filename
+   * @returns {Promise<File>}
+   */
+  static async getByFilename(filename) {
+    const data = await filesDb.findOne({ filename });
+
+    return new File(data);
+  }
+
+  /**
+   * Find all files which match passed query object
+   *
+   * @param {Object} query
+   * @returns {Promise<File[]>}
+   */
+  static async getAll(query = {}) {
+    const docs = await filesDb.find(query);
+
+    return Promise.all(docs.map(doc => new File(doc)));
+  }
+
+  /**
+   * @constructor
+   *
+   * @param {FileData} data
+   */
+  constructor(data = {}) {
+    if (data === null) {
+      data = {};
+    }
+
+    if (data._id) {
+      this._id = data._id;
+    }
+
+    this.data = data;
+  }
+
+  /**
+   * Set FileData object fields to internal model fields
+   *
+   * @param {FileData} fileData
+   */
+  set data(fileData) {
+    const { name, filename, path, mimetype, size } = fileData;
+
+    this.name = name || this.name;
+    this.filename = filename || this.filename;
+    this.path = path ? this.processPath(path) : this.path;
+    this.mimetype = mimetype || this.mimetype;
+    this.size = size || this.size;
+  }
+
+  /**
+   * Return FileData object
+   *
+   * @returns {FileData}
+   */
+  get data() {
+    return {
+      _id: this._id,
+      name: this.name,
+      filename: this.filename,
+      path: this.path,
+      mimetype: this.mimetype,
+      size: this.size
+    };
+  }
+
+  /**
+   * Save or update file data in the database
+   *
+   * @returns {Promise<File>}
+   */
+  async save() {
+    if (!this._id) {
+      const insertedRow = await filesDb.insert(this.data);
+
+      this._id = insertedRow._id;
+    } else {
+      await filesDb.update({ _id: this._id }, this.data);
+    }
+
+    return this;
+  }
+
+  /**
+   * Remove file data from the database
+   *
+   * @returns {Promise<File>}
+   */
+  async destroy() {
+    await filesDb.remove({ _id: this._id });
+
+    delete this._id;
+
+    return this;
+  }
+
+  /**
+   * Removes unnecessary public folder prefix
+   * @param {string} path
+   * @return {string}
+   */
+  processPath(path) {
+    return path.replace(/^public/, '');
+  }
+
+  /**
+   * Return readable file data
+   *
+   * @returns {FileData}
+   */
+  toJSON() {
+    return this.data;
+  }
+}
+
+module.exports = File;