Provide an ability to export translations

Fixes #45

src/mibew/configs/routing.yml

@@ -631,6 +631,22 @@ translation_edit_save:
         string_id: "\d{1,10}"
     methods: [POST]
 
+translation_export:
+    path: /operator/translation/export
+    defaults:
+        _controller: Mibew\Controller\Localization\TranslationExportController::showFormAction
+        _access_check: Mibew\AccessControl\Check\PermissionsCheck
+        _access_permissions: [CAN_ADMINISTRATE]
+    methods: [GET]
+
+translation_export_process:
+    path: /operator/translation/export
+    defaults:
+        _controller: Mibew\Controller\Localization\TranslationExportController::submitFormAction
+        _access_check: Mibew\AccessControl\Check\PermissionsCheck
+        _access_permissions: [CAN_ADMINISTRATE]
+    methods: [POST]
+
 translation_import:
     path: /operator/translation/import
     defaults:

src/mibew/libs/classes/Mibew/Controller/Localization/AbstractController.php

@@ -41,12 +41,18 @@ abstract class AbstractController extends BaseAbstractController
             ? $this->generateUrl('translations')
             : '';
 
-        $import = $route == 'translation_import'
+        $import = ($route == 'translation_import'
-            || $route == 'translation_import_process';
+            || $route == 'translation_import_process');
         $tabs[getlocal('Translations import')] = !$import
             ? $this->generateUrl('translation_import')
             : '';
 
+        $export = ($route == 'translation_export'
+            || $route == 'translation_export_process');
+        $tabs[getlocal('Translations export')] = !$export
+            ? $this->generateUrl('translation_export')
+            : '';
+
         $tabs[getlocal('Locales')] = ($route != 'locales')
             ? $this->generateUrl('locales')
             : '';

src/mibew/libs/classes/Mibew/Controller/Localization/TranslationExportController.php

@@ -0,0 +1,99 @@
+<?php
+/*
+ * Copyright 2005-2014 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+namespace Mibew\Controller\Localization;
+
+use Symfony\Component\HttpFoundation\Response;
+use Symfony\Component\HttpFoundation\Request;
+use Symfony\Component\Translation\MessageCatalogue;
+use Symfony\Component\Translation\Dumper\PoFileDumper;
+
+/**
+ * Contains actions for all translations export functionality.
+ */
+class TranslationExportController extends AbstractController
+{
+    /**
+     * Builds a page with form for downloading translation file.
+     *
+     * @param Request $request Incoming request.
+     * @return string Rendered page content.
+     */
+    public function showFormAction(Request $request)
+    {
+        set_csrf_token();
+        $operator = $this->getOperator();
+
+        $target = $request->request->get('target');
+        if (!preg_match("/^[\w-]{2,5}$/", $target)) {
+            $target = get_current_locale();
+        }
+
+        // Load list of all available locales.
+        $locales_list = array();
+        $all_locales = get_available_locales();
+        foreach ($all_locales as $loc) {
+            $locales_list[] = array(
+                'id' => $loc,
+                'name' => $this->getLocaleName($loc)
+            );
+        }
+
+        $page['localesList'] = $locales_list;
+        $page['formtarget'] = $target;
+        $page['title'] = getlocal('Translations export');
+        $page['menuid'] = 'translation';
+        $page = array_merge($page, prepare_menu($operator));
+        $page['tabs'] = $this->buildTabs($request);
+
+        return $this->render('translation_export', $page);
+    }
+
+    /**
+     * Processes submitting of the form which is generated in
+     * {@link \Mibew\Controller\TranslationExportController::showFormAction()}
+     * method.
+     *
+     * @param Request $request Incoming request.
+     * @return string Rendered page content.
+     */
+    public function submitFormAction(Request $request)
+    {
+        csrf_check_token($request);
+
+        $target = $request->request->get('target');
+        if (!preg_match("/^[\w-]{2,5}$/", $target)) {
+            $target = get_current_locale();
+        }
+
+        $messages = load_messages($target);
+        ksort($messages);
+
+        $catalogue = new MessageCatalogue($target, array('messages' => $messages));
+        $dumper = new PoFileDumper();
+        $output = $dumper->format($catalogue);
+
+        $response = new Response();
+        $response->headers->set('Content-type', 'application/octet-stream');
+        $response->headers->set('Content-Disposition', sprintf('attachment; filename=translation-%s.po', $target));
+        $response->headers->set('Content-Length', strlen($output));
+        $response->headers->set('Content-Transfer-Encoding', 'binary');
+        $response->setContent($output);
+
+        return $response;
+    }
+}

src/mibew/styles/pages/default/templates_src/server_side/translation_export.handlebars

@@ -0,0 +1,47 @@
+{{#extends "_layout"}}
+    {{#override "menu"}}{{> _menu}}{{/override}}
+
+    {{#override "content"}}
+        {{l10n "On this page you can download translations."}}
+
+        <br />
+        <br />
+
+        {{> _errors}}
+
+        <form  method="post" action="{{mibewRoot}}/operator/translation/export">
+            {{csrfTokenInput}}
+
+            <div>
+                {{> _tabs}}
+
+                <div class="mform">
+                    <div class="formtop">
+                        <div class="formtopi"></div>
+                    </div>
+
+                    <div class="forminner">
+                        <div class="fieldForm">
+                            {{l10n "For language:"}}<br/>
+                            <select name="target">
+                                {{#each localesList}}
+                                    <option value="{{id}}"{{#ifEqual id ../formtarget}} selected="selected"{{/ifEqual}}>{{name}}</option>
+                                {{/each}}
+                            </select>
+                        </div>
+
+                        <div class="fieldForm">
+                            <div class="fbutton">
+                                <input type="submit" name="save" class="submit-bg-button save-button" value="{{l10n "Download"}}"/>
+                            </div>
+                        </div>
+                    </div>
+
+                    <div class="formbottom">
+                        <div class="formbottomi"></div>
+                    </div>
+                </div>
+            </div>
+        </form>
+    {{/override}}
+{{/extends}}