FEATURE #1373: add history of content

This commit contains only core funcionality of displaying history. Module settings must be implemented in each module.

resources/assets/css/admin.css

@@ -1,4 +1,13 @@
 
+del {
+	text-decoration: line-through;
+	color: red;
+}
+ins {
+	text-decoration: none;
+	color: green;
+}
+
 .columns:last-child:not(:first-child), .column:last-child:not(:first-child) {
 	float: left;
 }

resources/lang/en/admin/history.php

@@ -0,0 +1,16 @@
+<?php
+return [
+    'pageName'              => 'History of :name',
+    'columnPageContent'     => 'Page content',
+    'columnUrl'             => 'URL',
+    'columnTitle'           => 'Title',
+    'columnMetaKeywords'    => 'Meta keywords',
+    'columnMetaDescription' => 'Description',
+    'columnStatus'          => 'Page visibility',
+    'changedFromTo'         => 'Changed from <del>:from</del> to <ins>:to</ins>',
+    'numOfChanges'          => 'One change|:count changes',
+    'diff'                  => 'Difference',
+    'diffPageName'          => 'Difference of :column',
+    'backToOverview'        => 'Back to history overview'
+
+];

resources/views/admin/history/diff.blade.php

@@ -0,0 +1,21 @@
+@extends('admin.layout')
+
+@section('pageName', @trans('admin/history.diffPageName', ['column' => $columnName]))
+
+@section('content')
+
+    <div class="row">
+        <h2>@lang('admin/history.diffPageName', ['column' => $columnName])</h2>
+
+    </div>
+
+    <div class="row callout">
+        {!! $diff !!}
+    </div>
+
+    <div class="row">
+        <a href="{{route('content.history', ['id' => $change->content_id])}}" class="button success">
+            @lang('admin/history.backToOverview')
+        </a>
+    </div>
+@stop

resources/views/admin/history/overview.blade.php

@@ -0,0 +1,31 @@
+@extends('admin.layout')
+
+@section('pageName', @trans('admin/history.pageName', ['name' => $page->title]))
+
+@section('content')
+
+    <div class="row">
+        <h2>@lang('admin/history.pageName', ['name' => $page->title])</h2>
+
+    </div>
+
+    <div class="row">
+        <ul class="accordion" data-accordion>
+            @foreach($history['changesets'] as $revision => $changes)
+            <li class="accordion-item" data-accordion-item>
+                <a class="accordion-title">
+                    <strong>{{$history['info'][$revision]['user']['name']}}</strong> |
+                    {{$history['info'][$revision]['changed_at']}} |
+                    {{trans_choice('admin/history.numOfChanges', count($changes))}}
+                </a>
+
+                @foreach($changes as $change)
+                <div class="accordion-content" data-tab-content>
+                    <strong>{{$change->column_trans}}</strong>: {!! $change->diff !!}
+                </div>
+                    @endforeach
+            </li>
+            @endforeach
+        </ul>
+    </div>
+@stop