Initial commit

application/model/TableModel.php

@@ -131,7 +131,6 @@ class TableModel
 
         $database = DatabaseFactory::getFactory()->getConnection();
         
-        // Build column definitions
         $column_definitions = array();
         foreach ($columns as $column) {
             $definition = "`" . $column['name'] . "` " . $column['type'];
@@ -151,7 +150,6 @@ class TableModel
             $column_definitions[] = $definition;
         }
         
-        // Handle primary key
         foreach ($columns as $column) {
             if (isset($column['key']) && $column['key'] === 'PRI') {
                 $column_definitions[] = "PRIMARY KEY (`" . $column['name'] . "`)";
@@ -260,6 +258,169 @@ class TableModel
         }
     }
 
+    /**
+     * Get the primary key column name for a table
+     * @param string $database_name
+     * @param string $table_name
+     * @return string|null
+     */
+    public static function getPrimaryKeyColumn($database_name, $table_name)
+    {
+        $columns = self::getTableColumns($database_name, $table_name);
+        foreach ($columns as $column) {
+            if ($column['Key'] === 'PRI') {
+                return $column['Field'];
+            }
+        }
+        return null;
+    }
+
+    /**
+     * Get a single row by primary key
+     * @param string $database_name
+     * @param string $table_name
+     * @param mixed $pk_value
+     * @return array|null
+     */
+    public static function getRow($database_name, $table_name, $pk_value)
+    {
+        $pk_column = self::getPrimaryKeyColumn($database_name, $table_name);
+        if (!$pk_column) {
+            return null;
+        }
+
+        $database = DatabaseFactory::getFactory()->getConnection();
+
+        $sql = "SELECT * FROM `" . $database_name . "`.`" . $table_name . "` WHERE `" . $pk_column . "` = :pk_value LIMIT 1";
+        $query = $database->prepare($sql);
+        $query->execute(array(':pk_value' => $pk_value));
+
+        return $query->fetch(PDO::FETCH_ASSOC);
+    }
+
+    /**
+     * Update a row in the table
+     * @param string $database_name
+     * @param string $table_name
+     * @param mixed $pk_value
+     * @param array $data - associative array of column => value
+     * @return bool
+     */
+    public static function updateRow($database_name, $table_name, $pk_value, $data)
+    {
+        if (!$database_name || !$table_name || !$pk_value || empty($data)) {
+            return false;
+        }
+
+        $pk_column = self::getPrimaryKeyColumn($database_name, $table_name);
+        if (!$pk_column) {
+            return false;
+        }
+
+        $database = DatabaseFactory::getFactory()->getConnection();
+
+        $set_parts = array();
+        $params = array();
+        $i = 0;
+        foreach ($data as $column => $value) {
+            if ($column === $pk_column) {
+                continue;
+            }
+            $param_name = ':param_' . $i;
+            $set_parts[] = "`" . $column . "` = " . $param_name;
+            $params[$param_name] = $value === '' ? null : $value;
+            $i++;
+        }
+
+        if (empty($set_parts)) {
+            return false;
+        }
+
+        $params[':pk_value'] = $pk_value;
+
+        try {
+            $sql = "UPDATE `" . $database_name . "`.`" . $table_name . "` SET " . implode(', ', $set_parts) . " WHERE `" . $pk_column . "` = :pk_value";
+            $query = $database->prepare($sql);
+            return $query->execute($params);
+        } catch (PDOException $e) {
+            return false;
+        }
+    }
+
+    /**
+     * Delete a row from the table
+     * @param string $database_name
+     * @param string $table_name
+     * @param mixed $pk_value
+     * @return bool
+     */
+    public static function deleteRow($database_name, $table_name, $pk_value)
+    {
+        if (!$database_name || !$table_name || !$pk_value) {
+            return false;
+        }
+
+        $pk_column = self::getPrimaryKeyColumn($database_name, $table_name);
+        if (!$pk_column) {
+            return false;
+        }
+
+        $database = DatabaseFactory::getFactory()->getConnection();
+
+        try {
+            $sql = "DELETE FROM `" . $database_name . "`.`" . $table_name . "` WHERE `" . $pk_column . "` = :pk_value";
+            $query = $database->prepare($sql);
+            return $query->execute(array(':pk_value' => $pk_value));
+        } catch (PDOException $e) {
+            return false;
+        }
+    }
+
+    /**
+     * Insert a new row into the table
+     * @param string $database_name
+     * @param string $table_name
+     * @param array $data - associative array of column => value
+     * @return bool|int - returns insert ID on success, false on failure
+     */
+    public static function insertRow($database_name, $table_name, $data)
+    {
+        if (!$database_name || !$table_name || empty($data)) {
+            return false;
+        }
+
+        $database = DatabaseFactory::getFactory()->getConnection();
+
+        $columns = array();
+        $placeholders = array();
+        $params = array();
+        $i = 0;
+
+        foreach ($data as $column => $value) {
+            if ($value === '' || $value === null) {
+                continue;
+            }
+            $columns[] = "`" . $column . "`";
+            $param_name = ':param_' . $i;
+            $placeholders[] = $param_name;
+            $params[$param_name] = $value;
+            $i++;
+        }
+
+        if (empty($columns)) {
+            return false;
+        }
+
+        try {
+            $sql = "INSERT INTO `" . $database_name . "`.`" . $table_name . "` (" . implode(', ', $columns) . ") VALUES (" . implode(', ', $placeholders) . ")";
+            $query = $database->prepare($sql);
+            $query->execute($params);
+            return $database->lastInsertId();
+        } catch (PDOException $e) {
+            return false;
+        }
+    }
+
     /**
      * Format bytes to human readable format
      * @param int $bytes