From 5d7372378966bbac6ddd89e6298acbc15e40984d Mon Sep 17 00:00:00 2001
From: codisart <louis.celier@gmail.com>
Date: Tue, 15 Oct 2019 01:31:24 +0200
Subject: [PATCH] Add sql query builder

---
 src/QueryBuilder/Column.php      | 25 ++++++++++++++++++++
 src/QueryBuilder/From.php        | 20 ++++++++++++++++
 src/QueryBuilder/Join.php        | 26 +++++++++++++++++++++
 src/QueryBuilder/Query.php       | 39 ++++++++++++++++++++++++++++++++
 src/QueryBuilder/Select.php      | 19 ++++++++++++++++
 src/QueryBuilder/Where.php       | 13 +++++++++++
 src/QueryBuilder/WhereEquals.php | 22 ++++++++++++++++++
 tests/QueryBuilder/QueryTest.php | 37 ++++++++++++++++++++++++++++++
 8 files changed, 201 insertions(+)
 create mode 100644 src/QueryBuilder/Column.php
 create mode 100644 src/QueryBuilder/From.php
 create mode 100644 src/QueryBuilder/Join.php
 create mode 100644 src/QueryBuilder/Query.php
 create mode 100644 src/QueryBuilder/Select.php
 create mode 100644 src/QueryBuilder/Where.php
 create mode 100644 src/QueryBuilder/WhereEquals.php
 create mode 100644 tests/QueryBuilder/QueryTest.php

diff --git a/src/QueryBuilder/Column.php b/src/QueryBuilder/Column.php
new file mode 100644
index 0000000..e7e80bb
--- /dev/null
+++ b/src/QueryBuilder/Column.php
@@ -0,0 +1,25 @@
+<?php
+
+
+namespace TipsTricks\QueryBuilder;
+
+
+class Column
+{
+    private $expression;
+    private $alias;
+
+    public function __construct(string $expression, string $alias = null)
+    {
+        $this->expression = $expression;
+        $this->alias = $alias;
+    }
+
+    public function __toString()
+    {
+        if ($this->alias) {
+            return Query::INDENT . $this->expression . ' AS ' . $this->alias;
+        }
+        return Query::INDENT . $this->expression;
+    }
+}
\ No newline at end of file
diff --git a/src/QueryBuilder/From.php b/src/QueryBuilder/From.php
new file mode 100644
index 0000000..5ca2bd5
--- /dev/null
+++ b/src/QueryBuilder/From.php
@@ -0,0 +1,20 @@
+<?php
+
+
+namespace TipsTricks\QueryBuilder;
+
+
+class From
+{
+    private $expression;
+
+    public function __construct(string $expression)
+    {
+        $this->expression = $expression;
+    }
+
+    public function __toString()
+    {
+        return "FROM " . $this->expression . PHP_EOL;
+    }
+}
\ No newline at end of file
diff --git a/src/QueryBuilder/Join.php b/src/QueryBuilder/Join.php
new file mode 100644
index 0000000..36110f7
--- /dev/null
+++ b/src/QueryBuilder/Join.php
@@ -0,0 +1,26 @@
+<?php
+
+
+namespace TipsTricks\QueryBuilder;
+
+
+class Join
+{
+    private $table;
+
+    private $condition;
+
+    public function __construct($table)
+    {
+        $this->table = $table;
+    }
+
+    private function conditions() {
+        return " ON order.customer_id = customer.id";
+    }
+
+    public function __toString()
+    {
+        return Query::INDENT . "JOIN " . $this->table . $this->conditions();
+    }
+}
\ No newline at end of file
diff --git a/src/QueryBuilder/Query.php b/src/QueryBuilder/Query.php
new file mode 100644
index 0000000..af14521
--- /dev/null
+++ b/src/QueryBuilder/Query.php
@@ -0,0 +1,39 @@
+<?php
+
+namespace TipsTricks\QueryBuilder;
+
+class Query
+{
+    const INDENT = "    ";
+
+    const FINAL_POINT = ";";
+
+    private $select;
+    private $from;
+    private $where;
+
+    public function __construct(Select $select, From $from, Where $where)
+    {
+        $this->select = $select;
+        $this->from   = $from;
+        $this->where  = $where;
+    }
+
+    public function __toString()
+    {
+        $parts = [
+            $this->select,
+            $this->from(),
+            $this->where,
+            Query::FINAL_POINT,
+        ];
+
+        return implode("\n", $parts);
+    }
+
+    private function from()
+    {
+        return $this->from . (new Join('customer'));
+    }
+}
+
diff --git a/src/QueryBuilder/Select.php b/src/QueryBuilder/Select.php
new file mode 100644
index 0000000..448597b
--- /dev/null
+++ b/src/QueryBuilder/Select.php
@@ -0,0 +1,19 @@
+<?php
+
+namespace TipsTricks\QueryBuilder;
+
+class Select
+{
+    private $columns;
+
+    public function __construct(array $columns)
+    {
+        $this->columns = $columns;
+    }
+
+    public function __toString()
+    {
+        $select = implode(",\n", $this->columns);
+        return PHP_EOL . "SELECT" . PHP_EOL . $select;
+    }
+}
\ No newline at end of file
diff --git a/src/QueryBuilder/Where.php b/src/QueryBuilder/Where.php
new file mode 100644
index 0000000..e0e716b
--- /dev/null
+++ b/src/QueryBuilder/Where.php
@@ -0,0 +1,13 @@
+<?php
+
+
+namespace TipsTricks\QueryBuilder;
+
+
+class Where
+{
+    public function __toString()
+    {
+        return "WHERE " . new WhereEquals('customer.id', '14');
+    }
+}
\ No newline at end of file
diff --git a/src/QueryBuilder/WhereEquals.php b/src/QueryBuilder/WhereEquals.php
new file mode 100644
index 0000000..a9e5956
--- /dev/null
+++ b/src/QueryBuilder/WhereEquals.php
@@ -0,0 +1,22 @@
+<?php
+
+
+namespace TipsTricks\QueryBuilder;
+
+
+class WhereEquals
+{
+    private $one;
+    private $two;
+
+    public function __construct($one, $two)
+    {
+        $this->one = $one;
+        $this->two = $two;
+    }
+
+    public function __toString()
+    {
+        return $this->one . ' = ' . $this->two;
+    }
+}
diff --git a/tests/QueryBuilder/QueryTest.php b/tests/QueryBuilder/QueryTest.php
new file mode 100644
index 0000000..914c4a8
--- /dev/null
+++ b/tests/QueryBuilder/QueryTest.php
@@ -0,0 +1,37 @@
+<?php
+
+use TipsTricks\QueryBuilder\Column;
+use TipsTricks\QueryBuilder\From;
+use TipsTricks\QueryBuilder\Query;
+use TipsTricks\QueryBuilder\Select;
+use TipsTricks\QueryBuilder\Where;
+
+class QueryTest extends \PHPUnit\Framework\TestCase
+{
+    public function testQuery()
+    {
+        $selects = [
+            new Column("SUM(order.price)", "total"),
+            new Column("customer.name"),
+        ];
+
+        $from = new From('order');
+
+        $select = new Select($selects);
+
+        $where = new Where();
+        $query = new Query($select, $from, $where);
+
+        $sql = <<<SQL
+
+SELECT
+    SUM(order.price) AS total,
+    customer.name
+FROM order
+    JOIN customer ON order.customer_id = customer.id
+WHERE customer.id = 14
+;
+SQL;
+         self::assertSame($sql, (string) $query);
+    }
+}
\ No newline at end of file