FEATURE #1372: add feature for editing static pages.

User can edit static pages. The edit itself also stores history of changed columns.

app/Models/Content.php

@@ -2,6 +2,7 @@
 
 namespace App\Models;
 
+use App\Http\Requests\Request;
 use Illuminate\Database\Eloquent\Model;
 use Illuminate\Support\Facades\DB;
 
@@ -55,6 +56,60 @@ class Content extends Model
         return $query;
     }
 
+    /**
+     * Updates current model with information about changed columns
+     *
+     * @param array   $fields
+     * @param Request $request
+     *
+     * @return int number of changed columns
+     */
+    public function updateWithHistory(array $fields, Request $request)
+    {
+        $editBatch = uniqid();
+        $changed = 0;
+
+        foreach ($fields as $fieldDB => $fieldRequest) {
+            // remove any whitespaces around real content
+            $request->$fieldRequest = trim($request->$fieldRequest);
+
+            if ($this->$fieldDB != $request->$fieldRequest) {
+
+                // setup history object
+                $history = [
+                    'user_id'    => \Auth::user()->id,
+                    'content_id' => $this->id,
+                    'edit_batch' => $editBatch,
+                    'column'     => $fieldRequest,
+                    'old_value'  => $this->$fieldDB,
+                    'new_value'  => $request->$fieldRequest
+                ];
+
+                // save history
+                ContentHistory::create($history);
+
+                // save change into database
+                $this->$fieldDB = $request->$fieldRequest;
+
+                $changed++;
+            }
+        }
+
+        $this->save();
+
+        return $changed;
+    }
+
+    /**
+     * Mark relationship with its historical records
+     *
+     * @return \Illuminate\Database\Eloquent\Relations\HasMany
+     */
+    public function history()
+    {
+        return $this->hasMany('App\Models\ContentHistory');
+    }
+
     /**
      * Mark relationship with users table
      *