<?php
/**
 * Provides the client class, an interface to the client table in the database
 *
 * @author Camil Staps
 *
 * BusinessAdmin: administrative software for small companies
 * Copyright (C) 2015 Camil Staps (ViviSoft)
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

/**
 * An interface to the client table in the database
 */
class client {
	/**
	 * @var pdo $pdo                    The PDO class for database communication
	 * @var int $id                     The id of the client
	 * @var string $name                The name of the client
	 */
	protected $pdo, $id, $name;

	/**
	 * Create a new instance
	 *
	 * @param PDO $pdo                  The PDO class, to access the database
	 * @param int $id                   The id of the client to fetch
	 *
	 * @throws PDOException             If something went wrong with the database
	 * @throws Exception                If the client could not be found
	 */
	public function __construct($pdo, $id) {
		$this->pdo = $pdo;

		$stmt = $this->pdo->prepare("SELECT * FROM `".constants::db_prefix."client` WHERE `id`=?");
		$stmt->execute(array($id));
		if ($stmt->rowCount() == 0) {
			throw new Exception("The client with id '$id' could not be found.");
		}
		$client = $stmt->fetch(PDO::FETCH_ASSOC);

		$this->id = $client['id'];
		$this->name = $client['name'];
	}

	//------------------------------------------------------------------------------
	// Getters and setters
	//------------------------------------------------------------------------------

	/**
	 * Get the ID of the client
	 *
	 * @return int                      The ID
	 */
	public function getId() {
		return $this->id;
	}

	/**
	 * Get the name of the client
	 *
	 * @return string The name
	 */
	public function getName() {
		return $this->name;
	}

	/**
	 * Set the name of the client
	 *
	 * @param string $name              The new name for the client
	 *
	 * @throws PDOException             If something went wrong with the database
	 *
	 * @return bool                     True on succes, false on failure
	 */
	public function setName($name) {
		$stmt = $this->pdo->prepare("UPDATE `".constants::db_prefix."client` SET `name`=? WHERE `id`=?");
		$stmt->execute(array($name, $this->id));
		if ($stmt->rowCount() == 1) {
			$this->name = $name;
			return true;
		} else {
			return false;
		}
	}

	/**
	 * Get all contact ids for this client
	 *
	 * @see client::getContacts()       This funtion returns instances of the contact class instead of just the ids
	 *
	 * @throws PDOException             Is something went wrong with the database
	 *
	 * @return int[]                    The ids
	 */
	public function getContactIds() {
		$ids = array();
		$contacts = $this->pdo->query("SELECT `id` FROM `".constants::db_prefix."contact` WHERE `clientId`={$this->id}")->fetchAll(PDO::FETCH_ASSOC);
		foreach ($contacts as $contact) {
			$ids[] = $contact['id'];
		}
		return $ids;
	}

	/**
	 * Get all contacts for this client
	 *
	 * @see client::getContactIds()     This function returns just the ids of the contacts, and not instances of the contact class
	 *
	 * @throws PDOException             If something went wrong with the database
	 *
	 * @return contact[]                An array indexed by id of instances of the contact class
	 */
	public function getContacts() {
		$ids = $this->getContactIds();
		$contacts = array();
		foreach ($ids as $id) {
			$contacts[$id] = new contact($this->pdo, $id);
		}
		return $contacts;
	}

	//------------------------------------------------------------------------------
	// Other functions
	//------------------------------------------------------------------------------

	/**
	 * Remove this client from the database
	 *
	 * If this doesn't succeed (i.e. false is returned), that means the client was removed manually or by another instance of this class
	 *
	 * @throws PDOException             If something went wrong with the database
	 *
	 * @return bool                     True on success, false on failure
	 */
	public function delete() {
		$stmt = $this->pdo->prepare("DELETE FROM `".constants::db_prefix."client` WHERE `id`=?");
		$stmt->execute(array($this->id));
		if ($stmt->rowCount() != 1) {
			return false;
		} else {
			return true;
		}
	}

	/**
	 * Make a new contact for this client
	 *
	 * @param string $name              The name for this contact
	 * @param string $email             The email for this contact
	 * @param string $address           The first address line of this contact (normally street and house number)
	 * @param string $address_2         The second address line of this contact
	 * @param string $postal_code       The postal code for this contact
	 * @param string $city              The city for this contact
	 * @param string $state             The state for this contact
	 * @param string $country           The country for this contact
	 *
	 * @throws PDOException             If something went wrong with the database
	 * @throws Exception                If there was a problem with the input
	 *
	 * @return contact                  A new instance of the contact class containing the new contact
	 */
	public function createContact($name, $email, $address, $address_2, $postal_code, $city, $country) {
		$stmt = $this->pdo->prepare("INSERT INTO `".constants::db_prefix."contact` (`clientId`,`name`,`email`,`address`,`address_2`,`postal_code`,`city`,`country`) VALUES (?,?,?,?,?,?,?,?)");
		$stmt->execute(array(
			$this->id,
			$name,
			$email,
			$address,
			$address_2,
			$postal_code,
			$city,
			$country
		));
		if ($stmt->rowCount() == 1) {
			return new contact($this->pdo, $this->pdo->lastInsertId());
		} else {
			$error = $stmt->errorInfo();
			throw new Exception($error[2]);
		}
	}
}