From ad457db740b83ee6958fbdd359766bb539ec2d55 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Michal=20Kv=C3=A1=C4=8Dek?= <michal@binarity.cz>
Date: Wed, 17 Feb 2016 16:14:26 +0100
Subject: [PATCH] FEATURE #1452: add database migration for adding templates
 into database

---
 .../2016_02_17_131804_AddTemplateSupport.php  | 124 ++++++++++++++++++
 1 file changed, 124 insertions(+)
 create mode 100644 database/migrations/2016_02_17_131804_AddTemplateSupport.php

diff --git a/database/migrations/2016_02_17_131804_AddTemplateSupport.php b/database/migrations/2016_02_17_131804_AddTemplateSupport.php
new file mode 100644
index 00000000..ca50f4c2
--- /dev/null
+++ b/database/migrations/2016_02_17_131804_AddTemplateSupport.php
@@ -0,0 +1,124 @@
+<?php
+
+use Illuminate\Database\Migrations\Migration;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Support\Facades\Schema;
+
+class AddTemplateSupport extends Migration
+{
+    /**
+     * Run the migrations.
+     *
+     * @return void
+     */
+    public function up()
+    {
+        // drop FK in contents table to modules
+        try {
+            Schema::table('contents', function (Blueprint $table) {
+                $table->dropForeign('fk_content_module1');
+            });
+        } catch (\Illuminate\Database\QueryException $e) {
+            // probably foreign does not exist, try to remove one from migration
+            try {
+                Schema::table('contents', function (Blueprint $table) {
+                    $table->dropForeign('contents_module_handler_foreign');
+                });
+            } catch (\Illuminate\Database\QueryException $ex) {
+                // ignore this error
+            }
+        }
+
+        // drop primary index in modules (previously was on handler column)
+        Schema::table('modules', function (Blueprint $table) {
+            $table->dropIndex('PRIMARY');
+        });
+
+        // create new column ID, set it autoincrement and set unique index to handler
+        Schema::table('modules', function (Blueprint $table) {
+            $table->integer('id', true)
+                  ->first();
+            $table->unique('handler');
+        });
+
+        // add again FK constraint to contents -> modules relationship
+        Schema::table('contents', function (Blueprint $table) {
+            $table->foreign('module_handler')
+                  ->references('handler')
+                  ->on('modules')
+                  ->onDelete('cascade')
+                  ->onUpdate('cascade');
+        });
+
+        // create new table with templates
+        Schema::create('templates', function (Blueprint $table) {
+            $table->integer('id', true);
+            $table->integer('module_id')
+                  ->comment('Template belongs to module specified with this ID.');
+            $table->timestamps();
+            $table->string('template_name', 128)
+                  ->comment('Template name used for rendering page. Use namespace::dir.template format.');
+            $table->string('path')
+                  ->comment('Path to this template. Given as relative path for theme directory.');
+            $table->string('name')
+                  ->comment('Human readable name of given template');
+            $table->mediumText('description')
+                  ->comment('Description of this template.');
+            $table->boolean('editable')
+                  ->comment('Can this template be edited?');
+
+            $table->index('module_id');
+            $table->index('template_name');
+            $table->unique(['module_id', 'template_name']);
+        });
+
+        // add FK to templates->modules
+        Schema::table('templates', function (Blueprint $table) {
+            $table->foreign('module_id')
+                  ->references('id')
+                  ->on('modules')
+                  ->onDelete('cascade')
+                  ->onUpdate('cascade');
+        });
+
+        // add column to contents - template name
+        Schema::table('contents', function (Blueprint $table) {
+            $table->string('template', 128)
+                  ->after('module_handler')
+                  ->comment('Template used for rendering this content page. [This should be FK to templates (template_name), however I was not able to create the constraint...]');
+
+            $table->index('template');
+        });
+    }
+
+    /**
+     * Reverse the migrations.
+     *
+     * @return void
+     */
+    public function down()
+    {
+
+        Schema::drop('templates');
+
+        Schema::table('contents', function (Blueprint $table) {
+            $table->dropForeign('contents_module_handler_foreign');
+        });
+
+        Schema::table('modules', function (Blueprint $table) {
+            $table->dropColumn('id');
+            $table->dropIndex('modules_handler_unique');
+            $table->primary('handler');
+        });
+
+        Schema::table('contents', function (Blueprint $table) {
+            $table->dropColumn('template');
+
+            $table->foreign('module_handler')
+                  ->references('handler')
+                  ->on('modules')
+                  ->onDelete('cascade')
+                  ->onUpdate('cascade');
+        });
+    }
+}