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<?php |
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/** |
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* |
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* Topic Preview |
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* |
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* @copyright (c) 2013 Matt Friedman |
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* @license GNU General Public License, version 2 (GPL-2.0) |
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* |
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*/ |
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namespace vse\topicpreview\core; |
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class data extends base |
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{ |
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/** |
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* Update an SQL SELECT statement to get data needed for topic previews |
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* |
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* @return string SQL SELECT appendage |
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*/ |
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public function tp_sql_select() |
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{ |
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$sql = ', fp.post_text AS first_post_text'; |
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if ($this->last_post_enabled()) |
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{ |
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$sql .= ', lp.post_text AS last_post_text'; |
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} |
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if ($this->avatars_enabled()) |
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{ |
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$sql .= $this->build_avatar_select('fp'); |
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if ($this->last_post_enabled()) |
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{ |
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$sql .= $this->build_avatar_select('lp'); |
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} |
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} |
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return $sql; |
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} |
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/** |
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* Update an SQL JOIN statement to get data needed for topic previews |
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* |
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* @return array SQL JOIN params |
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*/ |
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public function tp_sql_join() |
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{ |
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$sql_array = array(); |
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$sql_array['LEFT_JOIN'][] = array( |
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'FROM' => array(POSTS_TABLE => 'fp'), |
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'ON' => 'fp.post_id = t.topic_first_post_id' |
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); |
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if ($this->avatars_enabled()) |
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{ |
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$sql_array['LEFT_JOIN'][] = array( |
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'FROM' => array(USERS_TABLE => 'fpu'), |
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'ON' => 'fpu.user_id = t.topic_poster' |
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); |
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} |
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if ($this->last_post_enabled()) |
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{ |
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$sql_array['LEFT_JOIN'][] = array( |
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'FROM' => array(POSTS_TABLE => 'lp'), |
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'ON' => 'lp.post_id = t.topic_last_post_id' |
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); |
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if ($this->avatars_enabled()) |
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{ |
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$sql_array['LEFT_JOIN'][] = array( |
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'FROM' => array(USERS_TABLE => 'lpu'), |
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'ON' => 'lpu.user_id = t.topic_last_poster_id' |
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); |
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} |
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} |
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return $sql_array; |
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} |
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/** |
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* Modify SQL string|array to get post text |
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* |
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* @param string|array $sql_stmt SQL string or array to be modified |
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* @param string $type Type of SQL statement SELECT|JOIN |
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* @return string|array SQL statement string or array |
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*/ |
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public function modify_sql($sql_stmt, $type = 'SELECT') |
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{ |
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if (!$this->is_enabled()) |
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{ |
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return $sql_stmt; |
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} |
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if (is_array($sql_stmt)) |
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{ |
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$sql_stmt = $this->build_join_array($sql_stmt); |
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$sql_stmt['SELECT'] .= $this->tp_sql_select(); |
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return $sql_stmt; |
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} |
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if ($type == 'SELECT') |
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{ |
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$sql_stmt .= $this->tp_sql_select(); |
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return $sql_stmt; |
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} |
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return $this->build_join_statement($sql_stmt); |
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} |
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/** |
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* Build select statement for user avatar fields, e.g.: |
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* ', fpu.user_avatar AS fp_avatar |
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* , fpu.user_avatar_type AS fp_avatar_type |
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* , fpu.user_avatar_width AS fp_avatar_width |
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* , fpu.user_avatar_height AS fp_avatar_height' |
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* |
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* @param string $prefix First or last post (fp|lp) |
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* @return string Partial sql statement |
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*/ |
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protected function build_avatar_select($prefix) |
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{ |
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$sql = ''; |
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$avatar_ary = array( |
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'user_avatar' => 'avatar', |
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'user_avatar_type' => 'avatar_type', |
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'user_avatar_width' => 'avatar_width', |
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'user_avatar_height' => 'avatar_height', |
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); |
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foreach ($avatar_ary as $key => $var) |
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{ |
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$sql .= ", {$prefix}u.{$key} AS {$prefix}_$var"; |
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} |
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return $sql; |
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} |
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/** |
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* Add LEFT_JOIN statements to an sql array |
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* |
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* @param array $sql_stmt An sql array |
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* @return array Updated sql array |
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*/ |
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protected function build_join_array($sql_stmt) |
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{ |
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$array = $this->tp_sql_join(); |
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foreach ($array['LEFT_JOIN'] as $join) |
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{ |
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$sql_stmt['LEFT_JOIN'][] = $join; |
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} |
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return $sql_stmt; |
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} |
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/** |
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* Add LEFT_JOIN statements to an sql statement |
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* |
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* @param string $sql_stmt An sql statement |
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* @return string Updated sql statement |
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*/ |
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protected function build_join_statement($sql_stmt) |
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{ |
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$array = $this->tp_sql_join(); |
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foreach ($array['LEFT_JOIN'] as $join) |
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{ |
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$sql_stmt .= ' LEFT JOIN ' . key($join['FROM']) . ' ' . current($join['FROM']) . ' ON (' . $join['ON'] . ')'; |
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} |
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return $sql_stmt; |
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} |
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} |
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iMattPro /
topicpreview
