QnA - save answer revisions and show # of revisions

[quix0rs-gnu-social.git] / plugins / QnA / actions / qnareviseanswer.php

diff --git a/plugins/QnA/actions/qnareviseanswer.php b/plugins/QnA/actions/qnareviseanswer.php
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+<?php
+/**
+ * StatusNet - the distributed open-source microblogging tool
+ * Copyright (C) 2011, StatusNet, Inc.
+ *
+ * Revise an answer
+ *
+ * PHP version 5
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ * @category  QnA
+ * @package   StatusNet
+ * @author    Zach Copley <zach@status.net>
+ * @copyright 2011 StatusNet, Inc.
+ * @license   http://www.fsf.org/licensing/licenses/agpl-3.0.html AGPL 3.0
+ * @link      http://status.net/
+ */
+if (!defined('STATUSNET')) {
+    // This check helps protect against security problems;
+    // your code file can't be executed directly from the web.
+    exit(1);
+}
+
+/**
+ * Revise an answer
+ *
+ * @category  QnA
+ * @package   StatusNet
+ * @author    Zach Copley <zach@status.net>
+ * @copyright 2010 StatusNet, Inc.
+ * @license   http://www.fsf.org/licensing/licenses/agpl-3.0.html AGPL 3.0
+ * @link      http://status.net/
+ */
+class QnareviseanswerAction extends Action
+{
+    protected $user     = null;
+    protected $error    = null;
+    protected $question = null;
+    protected $answer   = null;
+    protected $content  = null;
+
+    /**
+     * Returns the title of the action
+     *
+     * @return string Action title
+     */
+    function title()
+    {
+        // TRANS: Page title for revising a question
+        return _m('Revise answer');
+    }
+
+    /**
+     * For initializing members of the class.
+     *
+     * @param array $argarray misc. arguments
+     *
+     * @return boolean true
+     */
+    function prepare($argarray)
+    {
+        parent::prepare($argarray);
+        if ($this->boolean('ajax')) {
+            StatusNet::setApi(true);
+        }
+
+        $this->user = common_current_user();
+
+        if (empty($this->user)) {
+            // TRANS: Client exception thrown trying to answer a question while not logged in.
+            throw new ClientException(
+                _m("You must be logged in to answer to a question."),
+                403
+            );
+        }
+
+        if ($this->isPost()) {
+            $this->checkSessionToken();
+        }
+
+        $id = substr($this->trimmed('id'), 7);
+
+        common_debug("XXXXXXXXXXXXXXXXXX id = " . $id);
+
+        $this->answer   = QnA_Answer::staticGet('id', $id);
+        $this->question = $this->answer->getQuestion(); 
+
+        if (empty($this->answer) || empty($this->question)) {
+            // TRANS: Client exception thrown trying to respond to a non-existing question.
+            throw new ClientException(
+                _m('Invalid or missing answer.'),
+                404
+            );
+        }
+
+        $this->answerText = $this->trimmed('answer');
+
+        return true;
+    }
+
+    /**
+     * Handler method
+     *
+     * @param array $argarray is ignored since it's now passed in in prepare()
+     *
+     * @return void
+     */
+    function handle($argarray=null)
+    {
+        parent::handle($argarray);
+
+        if ($this->isPost()) {
+            $this->reviseAnswer();
+        } else {
+            $this->showPage();
+        }
+
+        return;
+    }
+
+    /**
+     * Revise the answer
+     *
+     * @return void
+     */
+    function reviseAnswer()
+    {
+        $answer = $this->answer;
+        
+        try {
+            $orig = clone($answer);
+            $answer->content = $this->answerText;
+            $answer->revisions++;
+            $result = $answer->update($orig);
+        } catch (ClientException $ce) {
+            $this->error = $ce->getMessage();
+            $this->showPage();
+            return;
+        }
+        if ($this->boolean('ajax')) {
+            common_debug("ajaxy part");
+            header('Content-Type: text/xml;charset=utf-8');
+            $this->xw->startDocument('1.0', 'UTF-8');
+            $this->elementStart('html');
+            $this->elementStart('head');
+            // TRANS: Page title after sending an answer.
+            $this->element('title', null, _m('Answer'));
+            $this->elementEnd('head');
+            $this->elementStart('body');
+            $this->raw($answer->asHTML());
+            $this->elementEnd('body');
+            $this->elementEnd('html');
+        } else {
+            common_redirect($this->answer->bestUrl(), 303);
+        }
+    }
+
+    /**
+     * Show the revise answer form
+     *
+     * @return void
+     */
+    function showContent()
+    {
+        if (!empty($this->error)) {
+            $this->element('p', 'error', $this->error);
+        }
+
+        $form = new QnareviseanswerForm($this->answer, $this);
+        $form->show();
+
+        return;
+    }
+
+    /**
+     * Return true if read only.
+     *
+     * MAY override
+     *
+     * @param array $args other arguments
+     *
+     * @return boolean is read only action?
+     */
+    function isReadOnly($args)
+    {
+        if ($_SERVER['REQUEST_METHOD'] == 'GET' ||
+            $_SERVER['REQUEST_METHOD'] == 'HEAD') {
+            return true;
+        } else {
+            return false;
+        }
+    }
+}