#20: Implemented the genre merging tool.

app/Commands/DeleteGenreCommand.php

@@ -0,0 +1,76 @@
+<?php
+
+/**
+ * Pony.fm - A community for pony fan music.
+ * Copyright (C) 2015 Peter Deltchev
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+namespace Poniverse\Ponyfm\Commands;
+
+use Gate;
+use Illuminate\Foundation\Bus\DispatchesJobs;
+use Poniverse\Ponyfm\Genre;
+use Poniverse\Ponyfm\Jobs\DeleteGenre;
+use Validator;
+
+class DeleteGenreCommand extends CommandBase
+{
+    use DispatchesJobs;
+
+
+    /** @var Genre */
+    private $_genreToDelete;
+    private $_destinationGenre;
+
+    public function __construct($genreId, $destinationGenreId) {
+        $this->_genreToDelete = Genre::find($genreId);
+        $this->_destinationGenre = Genre::find($destinationGenreId);
+    }
+
+    /**
+     * @return bool
+     */
+    public function authorize() {
+        return Gate::allows('delete', $this->_genreToDelete);
+    }
+
+    /**
+     * @throws \Exception
+     * @return CommandResponse
+     */
+    public function execute() {
+        $rules = [
+            'genre_to_delete'    => 'required',
+            'destination_genre'  => 'required',
+        ];
+
+        // The validation will fail if the genres don't exist
+        // because they'll be null.
+        $validator = Validator::make([
+            'genre_to_delete' => $this->_genreToDelete,
+            'destination_genre' => $this->_destinationGenre,
+        ], $rules);
+
+
+        if ($validator->fails()) {
+            return CommandResponse::fail($validator);
+        }
+
+        $this->dispatch(new DeleteGenre($this->_genreToDelete, $this->_destinationGenre));
+
+        return CommandResponse::succeed(['message' => 'Genre deleted!']);
+    }
+}

app/Commands/RenameGenreCommand.php

@@ -33,7 +33,7 @@ class RenameGenreCommand extends CommandBase
 
     public function __construct($genreId, $newName)
     {
-        $this->_genre = Genre::find($genreId);;
+        $this->_genre = Genre::find($genreId);
         $this->_newName = $newName;
     }
 

app/Genre.php

@@ -22,6 +22,7 @@ namespace Poniverse\Ponyfm;
 
 use DB;
 use Illuminate\Database\Eloquent\Relations\Relation;
+use Illuminate\Database\Eloquent\SoftDeletes;
 use Poniverse\Ponyfm\Traits\SlugTrait;
 use Illuminate\Database\Eloquent\Model;
 use URL;
@@ -30,13 +31,14 @@ use Venturecraft\Revisionable\RevisionableTrait;
 class Genre extends Model
 {
     protected $table = 'genres';
+
     protected $fillable = ['name', 'slug'];
     protected $appends = ['track_count', 'url'];
     protected $hidden = ['trackCountRelation'];
 
     public $timestamps = false;
 
-    use SlugTrait, RevisionableTrait;
+    use SlugTrait, SoftDeletes, RevisionableTrait;
 
     public function tracks(){
         return $this->hasMany(Track::class, 'genre_id');

app/Http/Controllers/Api/Web/GenresController.php

@@ -21,6 +21,7 @@
 namespace Poniverse\Ponyfm\Http\Controllers\Api\Web;
 
 use Input;
+use Poniverse\Ponyfm\Commands\DeleteGenreCommand;
 use Poniverse\Ponyfm\Commands\RenameGenreCommand;
 use Poniverse\Ponyfm\Genre;
 use Poniverse\Ponyfm\Http\Controllers\ApiControllerBase;
@@ -50,4 +51,11 @@ class GenresController extends ApiControllerBase
         $command = new RenameGenreCommand($genreId, Input::get('name'));
         return $this->execute($command);
     }
+
+
+    public function deleteGenre($genreId)
+    {
+        $command = new DeleteGenreCommand($genreId, Input::get('destination_genre_id'));
+        return $this->execute($command);
+    }
 }

app/Http/routes.php

@@ -145,6 +145,7 @@ Route::group(['prefix' => 'api/web'], function() {
     Route::group(['prefix' => 'admin', 'middleware' => ['auth', 'can:access-admin-area']], function() {
         Route::get('/genres', 'Api\Web\GenresController@getIndex');
         Route::put('/genres/{id}', 'Api\Web\GenresController@putRename')->where('id', '\d+');
+        Route::delete('/genres/{id}', 'Api\Web\GenresController@deleteGenre')->where('id', '\d+');
     });
 
     Route::post('/auth/logout', 'Api\Web\AuthController@postLogout');

app/Jobs/DeleteGenre.php

@@ -0,0 +1,78 @@
+<?php
+
+/**
+ * Pony.fm - A community for pony fan music.
+ * Copyright (C) 2015 Peter Deltchev
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+namespace Poniverse\Ponyfm\Jobs;
+
+use Auth;
+use Poniverse\Ponyfm\Genre;
+use Illuminate\Queue\InteractsWithQueue;
+use Illuminate\Contracts\Bus\SelfHandling;
+use Illuminate\Contracts\Queue\ShouldQueue;
+use Poniverse\Ponyfm\Track;
+use SerializesModels;
+
+class DeleteGenre extends Job implements SelfHandling, ShouldQueue
+{
+    use InteractsWithQueue, SerializesModels;
+
+    protected $executingUser;
+    protected $genreToDelete;
+    protected $destinationGenre;
+
+    /**
+     * Create a new job instance.
+     *
+     * @param Genre $genreToDelete
+     * @param Genre $destinationGenre
+     */
+    public function __construct(Genre $genreToDelete, Genre $destinationGenre)
+    {
+        $this->executingUser = Auth::user();
+        $this->genreToDelete = $genreToDelete;
+        $this->destinationGenre = $destinationGenre;
+
+        // The genre is deleted synchronously before the job is executed in
+        // order to prevent race conditions.
+        $this->genreToDelete->delete();
+    }
+
+    /**
+     * Execute the job.
+     *
+     * @return void
+     */
+    public function handle()
+    {
+        // The user who kicked off this job is used when generating revision log entries.
+        Auth::login($this->executingUser);
+
+        // This is done instead of a single UPDATE query in order to
+        // generate revision logs for the change.
+        $this->genreToDelete->tracks()->chunk(200, function ($tracks) {
+            foreach ($tracks as $track) {
+                /** @var Track $track */
+
+                $track->genre_id = $this->destinationGenre->id;
+                $track->save();
+                $track->updateTags();
+            }
+        });
+    }
+}

app/Library/SerializesModels.php

@@ -0,0 +1,48 @@
+<?php
+
+/**
+ * Pony.fm - A community for pony fan music.
+ * Copyright (C) 2015 Peter Deltchev
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+use Illuminate\Contracts\Database\ModelIdentifier;
+
+/**
+ * Class SerializesModels
+ * This version of the SerializesModel trait overrides a method to make it work
+ * with soft-deletable models.
+ *
+ * @link https://github.com/laravel/framework/issues/9347#issuecomment-120803564
+ */
+trait SerializesModels {
+    use \Illuminate\Queue\SerializesModels;
+
+    /**
+     * Get the restored property value after deserialization.
+     *
+     * @param  mixed $value
+     * @return mixed
+     */
+    protected function getRestoredPropertyValue($value) {
+        if ($value instanceof ModelIdentifier) {
+            return method_exists($value->class, 'withTrashed')
+                ? (new $value->class)->withTrashed()->findOrFail($value->id)
+                : (new $value->class)->findOrFail($value->id);
+        } else {
+            return $value;
+        }
+    }
+}

app/Policies/GenrePolicy.php

@@ -28,4 +28,8 @@ class GenrePolicy
     public function rename(User $user, Genre $genre) {
         return $user->hasRole('admin');
     }
+
+    public function delete(User $user, Genre $genre) {
+        return $user->hasRole('admin');
+    }
 }

app/Track.php

@@ -24,7 +24,6 @@ use Auth;
 use Cache;
 use Config;
 use DB;
-use Illuminate\Database\Eloquent\ModelNotFoundException;
 use Poniverse\Ponyfm\Traits\SlugTrait;
 use Exception;
 use External;

composer.json

@@ -13,7 +13,8 @@
         "barryvdh/laravel-ide-helper": "^2.1",
         "guzzlehttp/guzzle": "~6.0",
         "doctrine/dbal": "^2.5",
-        "venturecraft/revisionable": "^1.23"
+        "venturecraft/revisionable": "^1.23",
+        "pda/pheanstalk": "~3.0"
     },
     "require-dev": {
         "fzaninotto/faker": "~1.4",

composer.lock

@@ -4,8 +4,8 @@
         "Read more about it at https://getcomposer.org/doc/01-basic-usage.md#composer-lock-the-lock-file",
         "This file is @generated automatically"
     ],
-    "hash": "5f66a059010df46b5b6e50c3e4056e17",
-    "content-hash": "07e7a5fff5a8914a7ced3d14959d194f",
+    "hash": "edca1732ab37f49b64614d5729d652d3",
+    "content-hash": "b476009ee841e5b048e73b4fab8372ee",
     "packages": [
         {
             "name": "barryvdh/laravel-ide-helper",
@@ -1622,6 +1622,56 @@
             ],
             "time": "2015-07-14 17:31:05"
         },
+        {
+            "name": "pda/pheanstalk",
+            "version": "v3.1.0",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/pda/pheanstalk.git",
+                "reference": "430e77c551479aad0c6ada0450ee844cf656a18b"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/pda/pheanstalk/zipball/430e77c551479aad0c6ada0450ee844cf656a18b",
+                "reference": "430e77c551479aad0c6ada0450ee844cf656a18b",
+                "shasum": ""
+            },
+            "require": {
+                "php": ">=5.3.0"
+            },
+            "require-dev": {
+                "phpunit/phpunit": "~4.0"
+            },
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-master": "3.0-dev"
+                }
+            },
+            "autoload": {
+                "psr-4": {
+                    "Pheanstalk\\": "src/"
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "Paul Annesley",
+                    "email": "paul@annesley.cc",
+                    "homepage": "http://paul.annesley.cc/",
+                    "role": "Developer"
+                }
+            ],
+            "description": "PHP client for beanstalkd queue",
+            "homepage": "https://github.com/pda/pheanstalk",
+            "keywords": [
+                "beanstalkd"
+            ],
+            "time": "2015-08-07 21:42:41"
+        },
         {
             "name": "phpdocumentor/reflection-docblock",
             "version": "2.0.4",

database/migrations/2015_11_24_182326_AddDeletedAtColumnToGenres.php

@@ -0,0 +1,49 @@
+<?php
+
+/**
+ * Pony.fm - A community for pony fan music.
+ * Copyright (C) 2015 Peter Deltchev
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Database\Migrations\Migration;
+
+class AddDeletedAtColumnToGenres extends Migration
+{
+    /**
+     * Run the migrations.
+     *
+     * @return void
+     */
+    public function up()
+    {
+        Schema::table('genres', function(Blueprint $table) {
+            $table->softDeletes()->index();
+        });
+    }
+
+    /**
+     * Reverse the migrations.
+     *
+     * @return void
+     */
+    public function down()
+    {
+        Schema::table('genres', function(Blueprint $table) {
+            $table->dropSoftDeletes();
+        });
+    }
+}

database/migrations/2015_12_05_235108_create_failed_jobs_table.php

@@ -0,0 +1,33 @@
+<?php
+
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Database\Migrations\Migration;
+
+class CreateFailedJobsTable extends Migration
+{
+    /**
+     * Run the migrations.
+     *
+     * @return void
+     */
+    public function up()
+    {
+        Schema::create('failed_jobs', function (Blueprint $table) {
+            $table->increments('id');
+            $table->text('connection');
+            $table->text('queue');
+            $table->longText('payload');
+            $table->timestamp('failed_at');
+        });
+    }
+
+    /**
+     * Reverse the migrations.
+     *
+     * @return void
+     */
+    public function down()
+    {
+        Schema::drop('failed_jobs');
+    }
+}

public/templates/admin/genres.html

@@ -6,7 +6,7 @@
             <th>Genre</th>
             <th class="-status"></th>
             <th># of tracks (including deleted)</th>
-            <th>Actions</th>
+            <th class="-actions">Actions</th>
         </thead>
         <tr ng-repeat="genre in genres">
             <td>
@@ -23,8 +23,10 @@
             </td>
             <td><i ng-show="genre.isSaving" class="icon-cog icon-spin icon-large"></i></td>
             <td><a ng-href="{{ genre.url }}">{{ genre.track_count }}</a></td>
-            <td>
-                <button class="btn btn-warning" disabled>Merge&hellip;</button>
+            <td class="-actions">
+                <button class="btn btn-warning" ng-hide="mergeInProgress" ng-click="startMerge(genre)">Merge&hellip;</button>
+                <button class="btn btn-danger" ng-show="mergeInProgress && genreToDelete.id != genre.id" ng-click="finishMerge(genre)">Merge in <em>{{ genreToDelete.name }}</em>&hellip;</button>
+                <button class="btn btn-warning" ng-show="mergeInProgress && genreToDelete.id == genre.id" ng-click="cancelMerge()">Cancel merge</button>
             </td>
         </tr>
     </table>

resources/assets/scripts/app/controllers/admin-genres.coffee

@@ -20,13 +20,21 @@ angular.module('ponyfm').controller 'admin-genres', [
 
         $scope.genres = []
 
+        # Used for merging/deleting genres
+        $scope.mergeInProgress = false
+        $scope.genreToDelete = null
+
         setGenres = (genres) ->
+            $scope.genres = []
             for genre in genres
                 genre.isSaving = false
                 genre.isError = false
                 $scope.genres.push(genre)
 
-        genres.fetch().done setGenres
+        loadGenres = () ->
+            genres.fetch().done setGenres
+
+        loadGenres()
 
 
         # Renames the given genre
@@ -42,7 +50,17 @@ angular.module('ponyfm').controller 'admin-genres', [
                 genre.isSaving = false
 
 
-        # Merges genre1 into genre2
-        mergeGenre = (genre1, genre2) ->
-           # stub method
+        $scope.startMerge = (genreToDelete) ->
+            $scope.genreToDelete = genreToDelete
+            $scope.mergeInProgress = true
+
+        $scope.cancelMerge = () ->
+            $scope.genreToDelete = null
+            $scope.mergeInProgress = false
+
+        $scope.finishMerge = (destinationGenre) ->
+            $scope.mergeInProgress = false
+            genres.merge($scope.genreToDelete.id, destinationGenre.id)
+                .done (response) ->
+                    loadGenres()
 ]

resources/assets/scripts/app/services/admin-genres.coffee

@@ -41,5 +41,17 @@ angular.module('ponyfm').factory('admin-genres', [
 
                 def.promise()
 
+            merge: (genre_id_to_delete, destination_genre_id) ->
+                url = "/api/web/admin/genres/#{genre_id_to_delete}"
+                def = new $.Deferred()
+
+                $http.delete(url, {params: {destination_genre_id: destination_genre_id}})
+                    .success (response)->
+                        def.resolve(response)
+
+                    .error (response)->
+                        def.reject(response)
+                        
+                def.promise()
         self
 ])

resources/assets/styles/admin.less

@@ -24,4 +24,8 @@
   .-status {
     width: 30px;
   }
+
+  .-actions {
+    width: 300px;
+  }
 }

vagrant/install.sh

@@ -36,5 +36,9 @@ cp -n "/vagrant/resources/environments/.env.local" "/vagrant/.env"
 php artisan migrate
 php artisan db:seed
 
-echo "Now - if you haven't already, SSH into the VM and run \`php artisan poni:setup\`!"
-echo "See the README for more details."
+echo ""
+echo "+-----------------------------------------------+"
+echo "| Now - if you haven't already, SSH into the VM |"
+echo "| and run \`php artisan poni:setup\`!             |"
+echo "| See the README for more details.              |"
+echo "+-----------------------------------------------+"