Updated to reflect live site

Signed-off-by: Sophia Atkinson <sophialul@protonmail.com>

user/plugins/timezones/plugin.php

@@ -0,0 +1,124 @@
+<?php
+/*
+Plugin Name: Time Zones ⏰
+Plugin URI: https://github.com/YOURLS/timezones
+Description: Tell YOURLS what timezone you are in
+Version: 1.3
+Author: YOURLS contributors
+Author URI: https://yourls.org/
+*/
+
+// No direct call
+if( !defined( 'YOURLS_ABSPATH' ) ) die();
+
+/**
+ * Register plugin admin page
+ */
+yourls_add_action( 'plugins_loaded', 'yourls_tzp_config' );
+function yourls_tzp_config() {
+    if( yourls_is_admin() ) {
+        require_once __DIR__ . '/admin.php';
+    }
+    yourls_register_plugin_page( 'time_zone_config', 'Time Zone Configuration', 'yourls_tzp_admin_page' );
+}
+
+/**
+ * Filter for time offset
+ */
+yourls_add_filter( 'get_time_offset', 'yourls_tzp_get_time_offset' );
+function yourls_tzp_get_time_offset() {
+    return yourls_tzp_timezoned_offset( yourls_tzp_read_options( 'time_zone', 'UTC' ) );
+}
+
+/**
+ * Filter for timestamps
+ */
+yourls_add_filter( 'get_timestamp', 'yourls_tzp_get_timestamp' );
+function yourls_tzp_get_timestamp($timestamp_offset, $timestamp, $offset) {
+    return yourls_tzp_timezoned_timestamp( $timestamp, yourls_tzp_read_options( 'time_zone', 'UTC' ) );
+}
+
+/**
+ * Filter for date + time format
+ */
+yourls_add_filter( 'get_datetime_format', 'yourls_tzp_get_datetime_format' );
+function yourls_tzp_get_datetime_format() {
+    return yourls_tzp_get_date_format() . ' ' .  yourls_tzp_get_time_format();
+}
+
+/**
+ * Filter for date (no time) format
+ */
+yourls_add_filter( 'get_date_format', 'yourls_tzp_get_date_format' );
+function yourls_tzp_get_date_format() {
+    $date_format = yourls_tzp_read_options('date_format', 'Y/m/d');
+    if( $date_format == 'custom' ) {
+        $date_format = yourls_tzp_read_options('date_format_custom', 'Y/m/d');
+    }
+    return $date_format;
+}
+
+/**
+ * Filter for time (no date) format
+ */
+yourls_add_filter( 'get_time_format', 'yourls_tzp_get_time_format' );
+function yourls_tzp_get_time_format() {
+    $time_format = yourls_tzp_read_options('time_format', 'H:i');
+    if( $time_format == 'custom' ) {
+        $time_format = yourls_tzp_read_options('time_format_custom', 'H:i');
+    }
+
+    return $time_format;
+}
+
+/**
+ * Return time offset of a timezone from UTC
+ *
+ * @param  string $timezone   Optional timezone (eg "Europe/Paris"). Default is UTC
+ * @return int                Timezoned time offset
+ */
+function yourls_tzp_timezoned_offset($timezone = 'UTC') {
+    $tz = new DateTime('now', new DateTimeZone($timezone));
+    return $tz->getOffset()/3600;
+}
+
+/**
+ * Return timezoned and formatted time
+ *
+ * @param  int    $timestamp  Optional timestamp. If omitted, function will use time()
+ * @param  string $timezone   Optional timezone (eg "Europe/Paris"). Default is UTC
+ * @param  string $format     Optional format as what PHP's date() needs. Default it 'U' (epoch)
+ * @return string             Timezoned and formatted time
+ */
+function yourls_tzp_timezoned_timestamp($timestamp = false, $timezone = 'UTC') {
+    $timestamp = $timestamp ? $timestamp : time();
+    $offset    = yourls_tzp_timezoned_offset($timezone);
+    return $timestamp + $offset * 3600;
+}
+
+/**
+ * Get (string)key from array, or return false if not defined
+ *
+ * @param  array  $array Array
+ * @param  string $key   Key
+ * @return string        Value of (string)$array[$key], or false
+ */
+function yourls_tzp_get_value( $array, $key, $default ) {
+    return isset ( $array[$key] ) ? (string)($array[$key]) : $default ;
+}
+
+/**
+ * Read timezone options from the DB, and return all keys or specified key
+ *
+ * @param  string $key   Key of timezone option array
+ * @return array|mixed   Array of options, or value for specified key if exists (false otherwise)
+ */
+function yourls_tzp_read_options( $key = false, $default = false ) {
+    $options = (array)yourls_get_option( 'timezone' );
+
+    if( $key !== false ) {
+        $options = array_key_exists($key, $options) ? $options[$key] : $default ;
+    }
+
+    return $options;
+}