改名

Database/Orm/Select.php

@@ -0,0 +1,104 @@
+<?php
+
+
+namespace Database\Orm;
+
+
+use Snowflake\Abstracts\BaseObject;
+use Database\ActiveQuery;
+use Database\Sql;
+use Database\Db;
+use Exception;
+
+/**
+ * Class Select
+ * @package Database\Orm
+ */
+class Select extends BaseObject
+{
+
+	use Condition;
+
+	/**
+	 * @param ActiveQuery|Db|Sql $query
+	 * @return string
+	 * @throws Exception
+	 */
+	public function getQuery($query)
+	{
+		return $this->generate($query, false);
+	}
+
+	/**
+	 * @param ActiveQuery|Db $query
+	 * @return string
+	 * @throws Exception
+	 */
+	public function count($query)
+	{
+		return $this->generate($query, true);
+	}
+
+	/**
+	 * @param ActiveQuery|Db|Sql $query
+	 * @param $isCount
+	 * @return string
+	 * @throws Exception
+	 */
+	private function generate($query, $isCount = false)
+	{
+		if (empty($query->from)) {
+			$query->from = $query->getTable();
+		}
+		$builder = array_filter([
+			$this->builderSelect($query->select, $isCount),
+			$this->builderFrom($query->from),
+			$this->builderAlias($query->alias),
+			$this->builderJoin($query->join),
+			$this->builderWhere($query->where),
+			$this->builderGroup($query->group)
+		], function ($value) {
+			return !empty($value);
+		});
+		if ($isCount) {
+			return implode('', $builder);
+		}
+
+		$order = $this->builderOrder($query->order);
+		if (!empty($order)) {
+			$builder[] = $order;
+		}
+		$builder[] = $this->builderLimit($query);
+
+		return implode('', $builder);
+	}
+
+	/**
+	 * @param null $select
+	 * @param bool $isCount
+	 * @return string
+	 */
+	private function builderSelect($select = NULL, $isCount = false)
+	{
+		if ($isCount === true) {
+			return 'SELECT COUNT(*)';
+		}
+		if (empty($select)) {
+			return "SELECT *";
+		}
+		if (is_array($select)) {
+			return "SELECT " . implode(',', $select);
+		} else {
+			return "SELECT " . $select;
+		}
+	}
+
+	/**
+	 * @param $table
+	 * @return string
+	 */
+	public function getColumn($table)
+	{
+		return 'SHOW FULL FIELDS FROM ' . $table;
+	}
+}