<?php
/**
 * Routes: GP_Route_Profile class
 *
 * @package GlotPress
 * @subpackage Routes
 * @since 1.0.0
 */

/**
 * Core class used to implement the profile route.
 *
 * @since 1.0.0
 */
class GP_Route_Profile extends GP_Route_Main {
	// For caching purposes
	private $projects = array();

	/**
	 * Displays the profile page, requires a user to be logged in.
	 */
	public function profile_get() {
		if ( ! is_user_logged_in() ) {
			$this->redirect( wp_login_url( gp_url_profile() ) );
			return;
		}

		$this->tmpl( 'profile' );
	}

	/**
	 * Displays the profile page for a given user.
	 *
	 * @param string $user A user nicename.
	 */
	public function profile_view( $user = '' ) {
		if ( '' == $user ) { // WPCS: loose comparison ok.
			$user = wp_get_current_user();
		} else {
			$user = get_user_by( 'slug', $user );
		}

		if ( ! $user || ( is_object( $user ) && $user instanceof WP_User && ! $user->exists() ) ) {
			return $this->die_with_404();
		}

		$recent_projects = $this->get_recent_translation_sets( $user, 5 );
		$locales         = $this->locales_known( $user );

		// validate to.
		$permissions = $this->get_permissions( $user );

		$this->tmpl( 'profile-public', get_defined_vars() );
	}

	/**
	 * Gets an array of recent translation sets the user has worked on.
	 *
	 * @param WP_User $user   A user object.
	 * @param int     $amount Number of recent translations to return.
	 *
	 * @return array $translation_sets An array of translation set objects
	 */
	private function get_recent_translation_sets( $user, $amount = 5 ) {
		global $wpdb;

		$translations = GP::$translation_set->many_no_map(
			"SELECT translation_set_id, date_added
			FROM $wpdb->gp_translations as t
			WHERE
				date_added >= DATE_SUB(NOW(), INTERVAL 2 MONTH) AND
				user_id = %s AND
				status != 'rejected'
			ORDER BY date_added DESC",
			$user->ID
		);

		$set_ids          = array();
		$translation_sets = array();

		$i = 0;
		foreach ( $translations as $translation ) {
			if ( in_array( $translation->translation_set_id, $set_ids, true ) ) {
				continue;
			}

			$set_ids[] = $translation->translation_set_id;

			$set = GP::$translation_set->find_one( array( 'id' => (int) $translation->translation_set_id ) );

			if ( $set ) {
				$translation_set = $this->get_translation_set( $set );

				if ( ! $translation_set ) {
					continue;
				}

				$translation_set->set_id       = $set->id;
				$translation_set->last_updated = $translation->date_added;
				$translation_set->count        = $wpdb->get_var( $wpdb->prepare( "SELECT COUNT(*) FROM $wpdb->gp_translations WHERE user_id = %s AND status != 'rejected' AND translation_set_id = %s", $user->ID, $translation->translation_set_id ) );

				$translation_sets[] = $translation_set;

				$i++;

				// Bail early if we have already the amount requested
				if ( $i >= $amount ) {
					break;
				}
			}
		}

		return $translation_sets;
	}

	/**
	 * Gets an array of locales the user has contributed to.
	 *
	 * @param WP_User $user   A user object.
	 *
	 * @return array $locales An array of locale objects
	 */
	private function locales_known( $user ) {
		global $wpdb;

		$translations = GP::$translation_set->many_no_map(
			"SELECT ts.locale, count(*) AS count
			FROM $wpdb->gp_translations as t
			INNER JOIN $wpdb->gp_translation_sets AS ts ON ts.id = t.translation_set_id
			WHERE user_id = %s
			GROUP BY ts.locale
			ORDER BY count DESC",
			$user->ID
		);

		$locales = array();

		foreach ( $translations as $data ) {
			$locale = GP_Locales::by_slug( $data->locale );

			$locales[ $locale->english_name ] = array(
				'locale' => $data->locale,
				'count'  => (int) $data->count,
			);
		}

		return $locales;
	}

	/**
	 * Retrieve a users permissions.
	 *
	 * @param WP_User $user The user object.
	 *
	 * @return array Array of permissions
	 */
	private function get_permissions( $user ) {
		$permissions = GP::$permission->find_many_no_map(
			array(
				'user_id' => $user->ID,
				'action'  => 'approve',
			)
		);

		foreach ( $permissions as $key => &$permission ) {
			$object_id = GP::$validator_permission->project_id_locale_slug_set_slug( $permission->object_id );

			// Skip admin permissions
			if ( ! isset( $object_id[1] ) ) {
				unset( $permissions[ $key ] );
				continue;
			}

			$set = GP::$translation_set->find_one(
				array(
					'project_id' => $object_id[0],
					'locale'     => $object_id[1],
					'slug'       => $object_id[2],
				)
			);

			// Skip permissions for non existing sets
			if ( ! $set ) {
				unset( $permissions[ $key ] );
				continue;
			}

			unset( $permission->id, $permission->action, $permission->object_type, $permission->object_id );

			$translation_set = $this->get_translation_set( $set );

			if ( $set && $translation_set ) {
				$permission         = (object) array_merge( (array) $permission, (array) $translation_set );
				$permission->set_id = $set->id;
			} else {
				unset( $permissions[ $key ] );
			}
		}

		return $permissions;
	}

	/**
	 * Gets an object representing the project id, project url and translation set name of the supplied set.
	 *
	 * @param GP_Translation_set $set   A translation set object.
	 *
	 * @return object
	 */
	private function get_translation_set( $set ) {
		if ( ! isset( $this->projects[ $set->project_id ] ) ) {
			$this->projects[ $set->project_id ] = GP::$project->get( $set->project_id );
		}

		$project = $this->projects[ $set->project_id ];

		if ( ! $project ) {
			return false;
		}

		$project_url = gp_url_project( $project, gp_url_join( $set->locale, $set->slug ) );
		$set_name    = gp_project_names_from_root( $project ) . ' | ' . $set->name_with_locale();

		return (object) array(
			'project_id'  => $project->id,
			'project_url' => $project_url,
			'set_name'    => $set_name,
		);
	}
}