first version

kirby/src/Database/Sql/Mysql.php

@@ -0,0 +1,12 @@
+<?php
+
+namespace Kirby\Database\Sql;
+
+use Kirby\Database\Sql;
+
+/**
+ * Mysql query builder
+ */
+class Mysql extends Sql
+{
+}

kirby/src/Database/Sql/Sqlite.php

@@ -0,0 +1,120 @@
+<?php
+
+namespace Kirby\Database\Sql;
+
+use Kirby\Database\Sql;
+
+/**
+ * Sqlite query builder
+ */
+class Sqlite extends Sql
+{
+
+    /**
+     * Returns a list of columns for a specified table
+     * SQLite version
+     *
+     * @param string $table The table name
+     * @return string
+     */
+    public function columns(string $table): array
+    {
+        return [
+            'query'    => 'PRAGMA table_info(' . $this->tableName($table) . ')',
+            'bindings' => [],
+        ];
+    }
+
+    /**
+     * Optional key definition for the column.
+     *
+     * @param array $column
+     * @return array
+     */
+    public function columnKey(array $column): array
+    {
+        if (isset($column['key']) === false || $column['key'] === 'INDEX') {
+            return [
+                'query' => null,
+                'bindings' => []
+            ];
+        }
+
+        return [
+            'query'    => $column['key'],
+            'bindings' => []
+        ];
+    }
+
+    /**
+     * Abstracted column types to simplify table
+     * creation for multiple database drivers
+     *
+     * @return array
+     */
+    public function columnTypes(): array
+    {
+        return [
+            'id'        => '{{ name }} INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL UNIQUE',
+            'varchar'   => '{{ name }} TEXT {{ null }} {{ key }} {{ default }}',
+            'text'      => '{{ name }} TEXT {{ null }} {{ key }} {{ default }}',
+            'int'       => '{{ name }} INTEGER {{ null }} {{ key }} {{ default }}',
+            'timestamp' => '{{ name }} INTEGER {{ null }} {{ key }} {{ default }}'
+        ];
+    }
+
+    /**
+     * Combines an identifier (table and column)
+     * SQLite version
+     *
+     * @param $table string
+     * @param $column string
+     * @param $values boolean Whether the identifier is going to be used for a values clause
+     *                        Only relevant for SQLite
+     * @return string
+     */
+    public function combineIdentifier(string $table, string $column, bool $values = false): string
+    {
+        // SQLite doesn't support qualified column names for VALUES clauses
+        if ($values) {
+            return $this->quoteIdentifier($column);
+        }
+
+        return $this->quoteIdentifier($table) . '.' . $this->quoteIdentifier($column);
+    }
+
+    /**
+     * Quotes an identifier (table *or* column)
+     *
+     * @param $identifier string
+     * @return string
+     */
+    public function quoteIdentifier(string $identifier): string
+    {
+        // * is special
+        if ($identifier === '*') {
+            return $identifier;
+        }
+
+        // replace every quote with two quotes
+        $identifier = str_replace('"', '""', $identifier);
+
+        // wrap in quotes
+        return '"' . $identifier . '"';
+    }
+
+    /**
+     * Returns a list of tables of the database
+     * SQLite version
+     *
+     * @param string $database The database name
+     * @return string
+     */
+    public function tables(): array
+    {
+        return [
+            'query'    => 'SELECT name FROM sqlite_master WHERE type = "table"',
+            'bindings' => []
+        ];
+    }
+}