1 files changed, 123 insertions, 0 deletions
diff --git a/src/Components/FunctionCall.php b/src/Components/FunctionCall.php
new file mode 100644
index 0000000..572b3f8
--- /dev/null
+++ b/src/Components/FunctionCall.php
@@ -0,0 +1,123 @@
+<?php
+
+/**
+ * Parses a function call.
+ *
+ * @package    SqlParser
+ * @subpackage Components
+ */
+namespace SqlParser\Components;
+
+use SqlParser\Component;
+use SqlParser\Parser;
+use SqlParser\Token;
+use SqlParser\TokensList;
+
+/**
+ * Parses a function call.
+ *
+ * @category   Keywords
+ * @package    SqlParser
+ * @subpackage Components
+ * @author     Dan Ungureanu <udan1107@gmail.com>
+ * @license    http://opensource.org/licenses/GPL-2.0 GNU Public License
+ */
+class FunctionCall extends Component
+{
+
+    /**
+     * The name of this function.
+     *
+     * @var string
+     */
+    public $name;
+
+    /**
+     * The list of parameters
+     *
+     * @var ArrayObj
+     */
+    public $parameters;
+
+    /**
+     * Constructor.
+     *
+     * @param string              $name       The name of the function to be called.
+     * @param array|ArrayObj $parameters The parameters of this function.
+     */
+    public function __construct($name = null, $parameters = null)
+    {
+        $this->name = $name;
+        if (is_array($parameters)) {
+            $this->parameters = new ArrayObj($parameters);
+        } elseif ($parameters instanceof ArrayObj) {
+            $this->parameters = $parameters;
+        }
+    }
+
+    /**
+     * @param Parser     $parser  The parser that serves as context.
+     * @param TokensList $list    The list of tokens that are being parsed.
+     * @param array      $options Parameters for parsing.
+     *
+     * @return FunctionCall
+     */
+    public static function parse(Parser $parser, TokensList $list, array $options = array())
+    {
+        $ret = new FunctionCall();
+
+        /**
+         * The state of the parser.
+         *
+         * Below are the states of the parser.
+         *
+         *      0 ----------------------[ name ]-----------------------> 1
+         *
+         *      1 --------------------[ parameters ]-------------------> -1
+         *
+         * @var int
+         */
+        $state = 0;
+
+        for (; $list->idx < $list->count; ++$list->idx) {
+            /**
+             * Token parsed at this moment.
+             * @var Token $token
+             */
+            $token = $list->tokens[$list->idx];
+
+            // End of statement.
+            if ($token->type === Token::TYPE_DELIMITER) {
+                break;
+            }
+
+            // Skipping whitespaces and comments.
+            if (($token->type === Token::TYPE_WHITESPACE) || ($token->type === Token::TYPE_COMMENT)) {
+                continue;
+            }
+
+            if ($state === 0) {
+                $ret->name = $token->value;
+                $state = 1;
+            } elseif ($state === 1) {
+                if (($token->type === Token::TYPE_OPERATOR) && ($token->value === '(')) {
+                    $ret->parameters = ArrayObj::parse($parser, $list);
+                }
+                break;
+            }
+
+        }
+
+        return $ret;
+    }
+
+    /**
+     * @param FunctionCall $component The component to be built.
+     *
+     * @return string
+     */
+    public static function build($component)
+    {
+        return $component->name . ArrayObj::build($component->parameters);
+    }
+}