move topic definitions into database

Store the, name, description,  list of policy sets and debates that
are associated with a topic in the database.

classes/Topic.php

@@ -0,0 +1,153 @@
+<?php
+/**
+ * Topic
+ *
+ * @package TheyWorkForYou
+ */
+
+namespace MySociety\TheyWorkForYou;
+
+class Topic {
+
+    /**
+     * DB handle
+     */
+    private $db;
+
+    private $raw;
+    private $id;
+    private $title;
+    private $slug;
+    private $description;
+
+    /**
+     * Constructor
+     *
+     */
+
+    public function __construct($data)
+    {
+        $this->db = new \ParlDB;
+
+        $this->raw = $data;
+        $this->id = $data['id'];
+        $this->title = $data['title'];
+        $this->slug = $data['slug'];
+        $this->description = $data['description'];
+
+    }
+
+
+    function data() {
+        return $this->raw;
+    }
+
+    function title() {
+        return $this->title;
+    }
+
+    function set_title($title) {
+        $this->title = $title;
+    }
+
+    function slug() {
+        return $this->slug;
+    }
+
+    function url() {
+        $url = new \URL('topic');
+        return $url->generate() . $this->slug;
+    }
+
+    function image() {
+        $image_name = preg_replace('/-/', '', $this->slug);
+        return "/images/topic" . $image_name . ".jpg";
+    }
+
+    function description() {
+        return $this->description;
+    }
+
+    function set_description($description) {
+        $this->description = $description;
+    }
+
+    function getContent() {
+        $q = $this->db->query(
+          "SELECT body, gid FROM epobject ep JOIN hansard h on ep.epobject_id = h.epobject_id 
+          WHERE ep.epobject_id in (
+            SELECT epobject_id from topic_epobjects WHERE topic_key = :topic_key
+          )",
+            array(
+                ':topic_key' => $this->id
+            )
+        );
+
+        $content = array();
+        $rows = $q->rows;
+        for ($i = 0; $i < $rows; $i++) {
+            $content[] = array(
+                'title' => $q->field($i, 'body'),
+                'href'  => Utility\Hansard::gid_to_url($q->field($i, 'gid')),
+            );
+        }
+
+        return $content;
+    }
+
+    function addContent($gid) {
+        $q = $this->db->query(
+          "SELECT epobject_id FROM hansard WHERE gid = :gid",
+          array(
+            ":gid" => $gid
+          )
+        );
+
+        if (!$q->success() || $q->rows == 0) {
+          return false;
+        }
+
+        $epobject_id = $q->field(0, 'epobject_id');
+
+        $q = $this->db->query(
+          "INSERT INTO topic_epobjects (topic_key, epobject_id) VALUES (:topic, :ep_id)",
+          array(
+            ":topic" => $this->id,
+            ":ep_id" => $epobject_id
+          )
+        );
+
+        return $q->success();
+    }
+
+    function getPolicySets() {
+      $q = $this->db->query(
+        "SELECT policyset FROM topic_policysets WHERE topic_key = :key",
+        array(
+          ':key' => $this->id
+        )
+      );
+
+      $sets = array();
+      $count = $q->rows;
+      for ($i = 0; $i < $count; $i++) {
+        $sets[] = $q->field($i, 'policyset');
+      }
+
+      return $sets;
+    }
+
+    function save() {
+        $q = $this->db->query(
+            "REPLACE INTO topics (id, title, slug, description) VALUES(:id, :title, :slug, :description)",
+            array(
+                ':id' => $this->id,
+                ':slug' => $this->slug(),
+                ':title' => $this->title(),
+                ':description' => $this->description()
+            )
+        );
+
+        return $q->success();
+    }
+}

classes/Topics.php

@@ -0,0 +1,51 @@
+<?php
+/**
+ * Topics
+ *
+ * @package TheyWorkForYou
+ */
+
+namespace MySociety\TheyWorkForYou;
+
+class Topics {
+
+    /**
+     * DB handle
+     */
+    private $db;
+
+    /**
+     * Constructor
+     *
+     */
+
+    public function __construct()
+    {
+        $this->db = new \ParlDB;
+    }
+
+    public function getTopics() {
+      $q = $this->db->query("SELECT id, slug, title, description FROM topics");
+
+      $topics = array();
+      $count = $q->rows();
+
+      for ($i = 0; $i < $count; $i++ ) {
+          $topic = $q->row($i);
+          $topics[$topic['slug']] = new Topic($topic);
+      }
+      return $topics;
+    }
+
+    public function getTopic($topic_name) {
+      $q = $this->db->query(
+          "SELECT id, slug, title, description FROM topics WHERE slug = :slug",
+          array(':slug' => $topic_name)
+      );
+      if ($q->rows) {
+          return new Topic($q->row(0));
+      }
+
+      return NULL;
+    }
+}

classes/Utility/Hansard.php

@@ -0,0 +1,45 @@
+<?php
+
+namespace MySociety\TheyWorkForYou\Utility;
+
+/**
+ * Hansard Utilities
+ *
+ * Utility functions related to content
+ */
+
+class Hansard
+{
+    public static function get_gid_from_url($url) {
+        $gid = NULL;
+        $parts = parse_url($url);
+        parse_str($parts['query'], $query);
+
+        if ( $query['id'] ) {
+            if (strpos($parts['path'], 'lords') !== false) {
+                $gid = 'uk.org.publicwhip/lords/';
+            } elseif (strpos($parts['path'], 'whall') !== false) {
+                $gid = 'uk.org.publicwhip/westminhall/';
+            } else {
+                $gid = 'uk.org.publicwhip/debate/';
+            }
+            $gid .= $query['id'];
+        }
+        return $gid;
+    }
+
+
+    public static function gid_to_url($gid) {
+        if ( !$gid ) {
+            return '';
+        }
+        global $hansardmajors;
+        $db = new \ParlDB();
+
+        $q = $db->query("SELECT major FROM hansard WHERE gid = :gid", array( ':gid' => $gid ));
+        $url_gid = fix_gid_from_db($gid);
+        $url = new \URL($hansardmajors[$q->field(0, 'major')]['page']);
+        $url->insert(array('id' => $url_gid));
+        return $url->generate();
+    }
+}

db/0011-add-topics-tables.sql

@@ -0,0 +1,27 @@
+CREATE TABLE `topics` (
+    `id` int(11) NOT NULL auto_increment,
+    `slug` varchar(100) NOT NULL,
+    `title` text NOT NULL,
+    `description` text,
+    PRIMARY KEY (`id`),
+    UNIQUE KEY `slug` (`slug`)
+);
+
+CREATE TABLE `topic_policysets` (
+  `topic_key` int(11) NOT NULL,
+  `policyset` varchar(30) NOT NULL,
+  UNIQUE KEY `topic_policyset` (`topic_key`, `policyset`)
+);
+
+CREATE TABLE `topic_policies` (
+  `topic_key` int(11) NOT NULL,
+  `policy_id` int(11) NOT NULL,
+  UNIQUE KEY `topic_policy` (`topic_key`, `policy_id`)
+);
+
+CREATE TABLE `topic_epobjects` (
+  `topic_key` int(11) NOT NULL,
+  `epobject_id` int(11) NOT NULL,
+  UNIQUE KEY `topic_object` (`topic_key`, `epobject_id`)
+);
+

db/schema.sql

@@ -518,3 +518,31 @@ CREATE TABLE `editorial` (
     PRIMARY KEY `item` (`item`)
 );
 
+
+CREATE TABLE `topics` (
+    `id` int(11) NOT NULL auto_increment,
+    `slug` varchar(100) NOT NULL,
+    `title` text NOT NULL,
+    `description` text,
+    PRIMARY KEY (`id`),
+    UNIQUE KEY `slug` (`slug`)
+);
+
+CREATE TABLE `topic_policysets` (
+  `topic_key` int(11) NOT NULL,
+  `policyset` varchar(30) NOT NULL,
+  UNIQUE KEY `topic_policyset` (`topic_key`, `policyset`)
+);
+
+CREATE TABLE `topic_policies` (
+  `topic_key` int(11) NOT NULL,
+  `policy_id` int(11) NOT NULL,
+  UNIQUE KEY `topic_policy` (`topic_key`, `policy_id`)
+);
+
+CREATE TABLE `topic_epobjects` (
+  `topic_key` int(11) NOT NULL,
+  `epobject_id` int(11) NOT NULL,
+  UNIQUE KEY `topic_object` (`topic_key`, `epobject_id`)
+);
+

www/docs/topic/index.php

@@ -8,16 +8,15 @@
 
 // Disable the old PAGE class.
 $new_style_template = TRUE;
+global $this_page;
+$this_page = 'topics';
 
 // Include all the things this page needs.
 include_once '../../includes/easyparliament/init.php';
 
 // Array of topic page names (must exist in metadata.php) and titles to display.
-$data['topics'] = array(
-    'topicbenefits'   => 'Benefits',
-    'topiccrimestats' => 'Crime Statistics',
-    'topicnhs'        => 'NHS'
-);
+$topics = new Topics();
+$data['topics'] = $topics->getTopics();
 
 // Send for rendering!
 Renderer::output('topic/list', $data);