Added metadata reading API endpoint (#28)

This implements an '/api/packages/metadata' which reads the global
package manifest as well as the user's in VFS.

Currently only system based VFS adapters is supported.

src/packages.js

@@ -41,6 +41,12 @@ const readOrDefault = filename => fs.existsSync(filename)
   ? fs.readJsonSync(filename)
   : [];
 
+/**
+ * @typedef InstallPackageOptions
+ * @param {boolean} system
+ * @param {object} [auth]
+ */
+
 /**
  * OS.js Package Management
  */
@@ -133,6 +139,36 @@ class Packages {
     }, 500);
   }
 
+  /**
+   * Installs a package from given url
+   * @param {string} url
+   * @param {InstallPackageOptions} options
+   */
+  async installPackage(url, options) {
+    throw new Error('Not implemented yet');
+  }
+
+  /**
+   * Reads package manifests
+   * @return {Package[]} List of packages
+   */
+  async readPackageManifests(user) {
+    const {realpath} = this.core.make('osjs/vfs');
+    const {manifestFile} = this.options;
+    const homePath = await realpath('home:/.packages/metadata.json', user);
+
+    const systemManifest = await readOrDefault(manifestFile);
+    const userManifest = await readOrDefault(homePath);
+
+    return [
+      ...systemManifest,
+      ...userManifest.map(pkg => Object.assign({}, pkg, {
+        _user: true,
+        server: null
+      }))
+    ];
+  }
+
   /**
    * Loads package data
    * @param {string} filename Filename

src/providers/packages.js

@@ -55,15 +55,35 @@ class PackageServiceProvider extends ServiceProvider {
     });
   }
 
+  depends() {
+    return [
+      'osjs/express'
+    ];
+  }
+
   provides() {
     return [
       'osjs/packages'
     ];
   }
 
   init() {
+    const {routeAuthenticated} = this.core.make('osjs/express');
+
     this.core.singleton('osjs/packages', () => this.packages);
 
+    routeAuthenticated('GET', '/api/packages/manifest', (req, res) => {
+      this.packages.readPackageManifests(req.session.user)
+        .then(json => res.json(json))
+        .catch(error => res.status(400).json({error}));
+    });
+
+    routeAuthenticated('POST', '/api/packages/install', (req, res) => {
+      this.packages.installPackage(req.body.url, req.body.options)
+        .then(() => res.json({success: true}))
+        .catch(error => res.status(400).json({error}));
+    });
+
     return this.packages.init();
   }