<?php

require_once ('Config.php');

/**
  * Language.php - manages language creation, update and delete.
  */

class Language {
	var $name;
	var $cmd;
	var $config;

	/**
	  * Language Constructor.
	  * $language = new Language($config, $id);
	  * 
	  * param $config Configuration class
	  * param $id When provided, grab all info for that language
	  */
	function Language ($config, $id="") {
		$this->config = $config;
		if ($id > 0) {
			$this->id = $id;
			$rows = $this->config->select("select id, name, cmd from languages where id = ?", $id);
			if (isset($rows[0]) && $rows[0]->id > 0) {
				$this->name = $rows[0]->name;
				$this->cmd = $rows[0]->cmd;
			} else {
				error_log("Language not found");
				return false;
			}
		}
		return true;
	}

	/**
	  * Create a new language if there's no language with that name yet.
	  * Construct object first.
	  * $language->create("my lang", "/bin/mylang");
	  *
	  * param $name The language name
	  * param $cmd Its binary, if not provided try to check it
	  * return $id Newly created language's ID
	  */
	function create ($name, $cmd="") {
		if ($this->config->select("select id from languages where name = ?", $name))
			return false;
		else {
			$values = array($name, $cmd);
			$this->config->query("insert into languages values (NULL, ?, ?)", $values);
			$rows = $this->config->select("select last_insert_id() as id");
			$this->id = $rows[0]->id;
			$this->name = $name;
			$this->cmd = $cmd;
			return $this->id;
		}
	}

	/**
	  * Update the current language on the database using the current parameters.
	  * $language->name = "my language's new name";
	  * $language->update()
	  */
	function update () {
		$values = array( $this->name, $this->cmd, $this->id );
		return $this->config->query("update languages set name = ?, cmd = ? where id = ?", $values);
	}

	/**
	  * Delete the current language IF and only IF there's no service using it.
	  * $language->delete();
	  */
	function delete () {
		$values = array( $this->id );
		if ($this->config->select("select id from services where language = ?", $values))
			return null;
		return $this->config->query("delete from languages where id = ?", $values);
	}

	/**
	  * Dumper.
	  * $language->dump();
	  */
	function dump () {
		print "\t\t\t* Language: $this->name\n";
		if ($this->cmd)
			print "\t\t\t  Language Cmd: $this->cmd\n";
	}
}
?>