<?php
/**
 * Provides the contact class, an interface to the contact 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 contact table in the database
 */
class Contact {
	/**
	 * @var PDO $pdo                    The PDO class for database communication
	 * @var int $id                     The id of the contact
	 * @var int $clientId               The id of the client the contact is linked to
	 * @var string $name                The name of the contact
	 * @var string $email               The email address of the contact
	 * @var string $address             The first address line (normally street and house number) of the contact
	 * @var string $address_2           The second address line (can be null)
	 * @var string $postal_code         The postal code of the contact
	 * @var string $city                The city of the contact
	 * @var string $country             The country of the contact
	 * @var string $language            The language of the contact
	 */
	protected $pdo, $id, $clientId, $name, $email, $address, $postal_code, $city, $country, $language;

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

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

		$this->id = $contact['id'];
		$this->clientId = $contact['clientId'];
		$this->name = $contact['name'];
		$this->email = $contact['email'];
		$this->address = $contact['address'];
		$this->address_2 = $contact['address_2'];
		$this->postal_code = $contact['postal_code'];
		$this->city = $contact['city'];
		$this->country = $contact['country'];
		$this->language = $contact['language'];
	}

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

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

	/**
	 * Get the ID of the client that this contact is linked to
	 *
	 * @return int                      The ID
	 */
	public function getClientId() {
		return $this->clientId;
	}

	/**
	 * Get the client that this contact is linked to
	 *
	 * @return client                   The client
	 */
	public function getClient() {
		return new Client($this->pdo, $this->clientId);
	}

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

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

	/**
	 * Get the email of the contact
	 *
	 * @return string                   The email
	 */
	public function getEmail() {
		return $this->email;
	}

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

	/**
	 * Get the first address line of the contact
	 *
	 * @return string                   The address
	 */
	public function getAddress() {
		return $this->address;
	}

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

	/**
	 * Get the second address line of the contact
	 *
	 * @return string                   The address
	 */
	public function getAddress_2() {
		return $this->address_2;
	}

	/**
	 * Set the second address line of the contact
	 *
	 * @param string $address_2         The new address for the contact
	 *
	 * @throws PDOException             If something went wrong with the database
	 *
	 * @return bool                     True on succes, false on failure
	 */
	public function setAddress_2($address_2) {
		$stmt = $this->pdo->prepare("UPDATE `".Constants::db_prefix."contact` SET `address_2`=? WHERE `id`=?");
		$stmt->execute(array($address_2, $this->id));
		if ($stmt->rowCount() == 1) {
			$this->address_2 = $address_2;
			return true;
		} else {
			return false;
		}
	}

	/**
	 * Get the postal_code of the contact
	 *
	 * @return string                   The postal_code
	 */
	public function getPostalCode() {
		return $this->postal_code;
	}

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

	/**
	 * Get the city of the contact
	 *
	 * @return string                   The city
	 */
	public function getCity() {
		return $this->city;
	}

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

	/**
	 * Get the country of the contact
	 *
	 * @return string                   The country
	 */
	public function getCountry() {
		return $this->country;
	}

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

	/**
	 * Get the language of the contact
	 *
	 * @return string                   The language
	 */
	public function getLanguage() {
		return $this->language;
	}

	/**
	 * Set the language of the contact
	 *
	 * @see correspondence::LANGUAGES   The available languages
	 *
	 * @param string $language          The new language for the contact
	 *
	 * @throws PDOException             If something went wrong with the database
	 * @throws Exception                If the language is unknown
	 *
	 * @return bool                     True on succes, false on failure
	 */
	public function setLanguage($language) {
		if (!in_array($language, correspondence::LANGUAGES)) {
			throw new Exception("Language $language not available.");
		}
		$stmt = $this->pdo->prepare("UPDATE `".Constants::db_prefix."contact` SET `language`=? WHERE `id`=?");
		$stmt->execute(array($language, $this->id));
		if ($stmt->rowCount() == 1) {
			$this->language = $language;
			return true;
		} else {
			return false;
		}
	}

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

	/**
	 * Remove this contact from the database
	 *
	 * If this doesn't succeed (i.e. false is returned), that means the contact 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."contact` WHERE `id`=?");
		$stmt->execute(array($this->id));
		if ($stmt->rowCount() != 1) {
			return false;
		} else {
			return true;
		}
	}

	/**
	 * Make a new offer for this contact
	 *
	 * @throws PDOException             If something went wrong with the database
	 * @throws Exception                If there was a problem with the input
	 *
	 * @return offer                    A new instance of the offer class containing the new offer
	 */
	public function createOffer() {
		$stmt = $this->pdo->prepare("INSERT INTO `".Constants::db_prefix."offer` (`contactId`) VALUES (?)");
		$stmt->execute(array($this->id));
		if ($stmt->rowCount() == 1) {
			return new Offer($this->pdo, $this->pdo->lastInsertId());
		} else {
			$error = $stmt->errorInfo();
			throw new Exception($error[2]);
		}
	}
}