FEATURE #1508: add database structure for directories

database/migrations/2016_03_13_131109_AddFileFirectoriesSupport.php

@@ -0,0 +1,74 @@
+<?php
+
+use Illuminate\Database\Migrations\Migration;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Support\Facades\Schema;
+
+class AddFileFirectoriesSupport extends Migration
+{
+    /**
+     * Run the migrations.
+     *
+     * @return void
+     */
+    public function up()
+    {
+        Schema::create('directories', function (Blueprint $table) {
+            $table->integer('id', true);
+            $table->timestamps();
+            $table->integer('user_id')
+                  ->comment('ID of user, who created this directory.')
+                  ->index();
+            $table->integer('parent_id')
+                  ->index()
+                  ->comment('ID of parent directory')
+                  ->nullable()
+                  ->default(null);
+            $table->string('name')
+                  ->comment('Directory name used for better navigation');
+            $table->mediumText('description')
+                  ->comment('Description of directory')
+                  ->nullable()
+                  ->default(null);
+            $table->boolean('hidden')
+                  ->comment('Hide this directory from view of all directories?')
+                  ->default(false);
+            $table->unique(['parent_id', 'name']);
+        });
+
+        Schema::table('files', function (Blueprint $table) {
+            $table->dropColumn('directory');
+            $table->integer('directory_id')
+                  ->index()
+                  ->after('filename')
+                  ->comment('FK to directories table')
+                  ->nullable()
+                  ->default(null);
+
+            $table->foreign('directory_id')
+                  ->references('id')
+                  ->on('directories')
+                  ->onDelete('restrict')
+                  ->onUpdate('cascade');
+        });
+    }
+
+    /**
+     * Reverse the migrations.
+     *
+     * @return void
+     */
+    public function down()
+    {
+        Schema::table('files', function (Blueprint $table) {
+            $table->dropForeign('files_directory_id_foreign');
+            $table->dropColumn('directory_id');
+            $table->string('directory')
+                  ->comment('Not real directory on FS, only virtual one - used for better user orientation in large file collections')
+                  ->default('/');
+        });
+
+        Schema::drop('directories');
+
+    }
+}