Add JavaScript geolocation for weather (close #3)

langs/en/weather.json

@@ -4,5 +4,6 @@
     "Temperature: {temp}{units}": "Temperature: {temp}{units}",
     "{temp}{units}": "{temp}{units}",
     "{tempLow} to {tempHigh}{units}": "{tempLow} to {tempHigh}{units}",
-    "Low: {tempLow}{units} High: {tempHigh}{units}": "Low: {tempLow}{units} | High: {tempHigh}{units}"
+    "Low: {tempLow}{units} High: {tempHigh}{units}": "Low: {tempLow}{units} | High: {tempHigh}{units}",
+    "Geolocate": "Geolocate"
 }

lib/Weather.lib.php

@@ -28,7 +28,7 @@ abstract class Weather {
      * @global type $SETTINGS
      * @return boolean true if successful, false if not
      */
-    public function setLocationByUserIP() {
+    public function setLocationByUserIP(): bool {
         global $SETTINGS;
         // Make sure we'll have a valid IP when testing on localhost
         if ($SETTINGS['debug'] && $_SERVER['REMOTE_ADDR'] == "127.0.0.1") {
@@ -59,6 +59,24 @@ abstract class Weather {
         }
     }
 
+    /**
+     * Attempt to set the user's location based on sent cookies named "Latitude"
+     * and "Longitude".
+     * @return bool true if successful.
+     */
+    public function setLocationByCookie(): bool {
+        if (!empty($_COOKIE['Latitude']) && !empty($_COOKIE['Longitude'])) {
+            $latlngregex = "/-?[0-9]{1,3}(\.[0-9]+)?/";
+            if (preg_match($latlngregex, $_COOKIE['Latitude']) && preg_match($latlngregex, $_COOKIE['Longitude'])) {
+                $this->lat = $_COOKIE['Latitude'] * 1.0;
+                $this->lng = $_COOKIE['Longitude'] * 1.0;
+                return true;
+            }
+            return false;
+        }
+        return false;
+    }
+
     abstract protected function loadForecast();
 
     // Getters

pages.php

@@ -15,6 +15,7 @@ define("PAGES", [
         ],
         "scripts" => [
             "static/Shuffle/dist/shuffle.min.js",
+            "static/js/locationcookie.js",
             "static/js/newsgrid.js",
             "static/js/home.js"
         ]
@@ -36,6 +37,9 @@ define("PAGES", [
         "styles" => [
             "static/weather-icons/css/weather-icons.min.css"
         ],
+        "scripts" => [
+            "static/js/locationcookie.js"
+        ]
     ],
     "404" => [
         "title" => "404 error"

pages/home.php

@@ -8,8 +8,12 @@
 header("Link: <static/img/news-placeholder.svg>; rel=preload; as=image", false);
 
 $weatherclass = "Weather_" . $SETTINGS['sources']['weather'];
-$weather = new $weatherclass(46.595, -112.027); // TODO: get user location
+$lat = 46.595;
-$weather->setLocationByUserIP();
+$lng = -112.027;
+$weather = new $weatherclass($lat, $lng);
+if (!$weather->setLocationByCookie()) {
+    $weather->setLocationByUserIP();
+}
 $weather->loadForecast();
 
 $tempunits = "C";
@@ -112,13 +116,18 @@ foreach ($newsitems as $item) {
             <a class="px-2" href="./action.php?action=settempunits&source=home&unit=K">K</a>
         </div>
 
-        <div class="text-muted">
+        <div>
+            <span class="text-muted">
                 <i class="fas fa-map-marker-alt"></i> <?php
                 if (!empty($weather->getLocationName())) {
                     echo htmlentities($weather->getLocationName()) . " | ";
                 }
                 echo round($weather->getLatitude(), 2) . ", " . round($weather->getLongitude(), 2);
                 ?>
+            </span>
+            <span id="geolocate-btn" class="btn btn-link btn-sm ml-2">
+                <i class="fas fa-compass"></i> <?php $Strings->get("Geolocate"); ?>
+            </span>
         </div>
     </div>
 </div>

pages/weather.php

@@ -6,8 +6,12 @@
  */
 
 $weatherclass = "Weather_" . $SETTINGS['sources']['weather'];
-$weather = new $weatherclass(46.595, -112.027); // TODO: get user location
+$lat = 46.595;
-$weather->setLocationByUserIP();
+$lng = -112.027;
+$weather = new $weatherclass($lat, $lng);
+if (!$weather->setLocationByCookie()) {
+    $weather->setLocationByUserIP();
+}
 $weather->loadForecast();
 
 $tempunits = "C";
@@ -112,13 +116,18 @@ if (!empty($_COOKIE['TemperatureUnitsPref']) && preg_match("/[FCK]/", $_COOKIE['
                 <a class="px-2" href="./action.php?action=settempunits&source=weather&unit=K">K</a>
             </div>
 
-            <div class="text-muted">
+            <div>
+                <span class="text-muted">
                     <i class="fas fa-map-marker-alt"></i> <?php
                     if (!empty($weather->getLocationName())) {
                         echo htmlentities($weather->getLocationName()) . " | ";
                     }
                     echo round($weather->getLatitude(), 2) . ", " . round($weather->getLongitude(), 2);
                     ?>
+                </span>
+                <span id="geolocate-btn" class="btn btn-link btn-sm ml-2">
+                    <i class="fas fa-compass"></i> <?php $Strings->get("Geolocate"); ?>
+                </span>
             </div>
         </div>
     </div>

static/js/locationcookie.js

@@ -0,0 +1,21 @@
+/*
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+
+
+function geolocateToCookie() {
+    navigator.geolocation.getCurrentPosition(function (pos) {
+        document.cookie = "Latitude=" + pos.coords.latitude.toFixed(2) + ";samesite=strict;max-age=" + (60 * 60 * 24 * 90);
+        document.cookie = "Longitude=" + pos.coords.longitude.toFixed(2) + ";samesite=strict;max-age=" + (60 * 60 * 24 * 90);
+        document.location.reload();
+    }, function () {
+        alert("Could not determine location.  Please note that your coordinates are rounded to approx. 1km before being sent to the server.");
+    }, {
+        timeout: 1000 * 60,
+        enableHighAccuracy: true
+    });
+}
+
+$("#geolocate-btn").click(geolocateToCookie);