[locale] Update the map-QML implementation

- Config has suitable strings for displaying TZ information.
  Use them and automatic bindings. Don't update the strings manually.
- Suggest online or offline TZ lookups based on what the distro wants.
  Edit the QML to pick online lookups (needs access to the geonames
  service, though).
- Drop the variables that point at config and geoip: the Config
  object has a currentLocation, which is filled in by both the
  configuration and any GeoIP lookup -- it doesn't have city
  or country information though.

src/modules/localeq/Map.qml

@@ -29,17 +29,12 @@ import QtPositioning 5.14
 Column {
     width: parent.width
 
-    //Needs to come from .conf/geoip
-    property var configCity: "New York"
-    property var configCountry: "USA"
-    property var configTimezone: "America/New York"
-    property var geoipCity: "" //"Amsterdam"
-    property var geoipCountry: "" //"Netherlands"
-    property var geoipTimezone: "" //"Europe/Amsterdam"
-    // vars that will stay once connected
-    property var cityName: (geoipCity != "") ? geoipCity : configCity
-    property var countryName: (geoipCountry != "") ? geoipCountry : configCountry
-    property var timeZone: (geoipTimezone != "") ? geoipTimezone : configTimezone
+    // These are used by the map query to initially center the
+    //   map on the user's likely location. They are updated by
+    //   getIp() which does a more accurate GeoIP lookup than
+    //   the default one in Calamares
+    property var cityName: ""
+    property var countryName: ""
 
     function getIp() {
         var xhr = new XMLHttpRequest
@@ -51,9 +46,10 @@ Column {
                 var ct = responseJSON.city
                 var cy = responseJSON.country
 
-                tzText.text = "Timezone: " + tz
                 cityName = ct
                 countryName = cy
+
+                config.setCurrentLocation(tz)
             }
         }
 
@@ -63,7 +59,15 @@ Column {
         xhr.send()
     }
 
-    function getTz() {
+    /* This is an **accurate** TZ lookup method: it queries an
+     * online service for the TZ at the given coordinates. It
+     * requires an internet connection, though, and the distribution
+     * will need to have an account with geonames to not hit the
+     * daily query limit.
+     *
+     * See below, in MouseArea, for calling the right method.
+     */
+    function getTzOnline() {
         var xhr = new XMLHttpRequest
         var latC = map.center.latitude
         var lonC = map.center.longitude
@@ -73,16 +77,29 @@ Column {
                 var responseJSON = JSON.parse(xhr.responseText)
                 var tz2 = responseJSON.timezoneId
 
-                tzText.text = "Timezone: " + tz2
                 config.setCurrentLocation(tz2)
             }
         }
 
+        console.log("Online lookup", latC, lonC)
         // Needs to move to localeq.conf, each distribution will need their own account
         xhr.open("GET", "http://api.geonames.org/timezoneJSON?lat=" + latC + "&lng=" + lonC + "&username=SOME_USERNAME")
         xhr.send()
     }
 
+    /* This is a quick TZ lookup method: it uses the existing
+     * Calamares "closest TZ" code, which has lots of caveats.
+     *
+     * See below, in MouseArea, for calling the right method.
+     */
+    function getTzOffline() {
+        var latC = map.center.latitude
+        var lonC = map.center.longitude
+        var tz = config.zonesModel.lookup(latC, lonC)
+        console.log("Offline lookup", latC, lonC)
+        config.setCurrentLocation(tz.region, tz.zone)
+    }
+
     Rectangle {
         width: parent.width
         height: parent.height / 1.28
@@ -156,9 +173,8 @@ Column {
                     map.center.latitude = coordinate.latitude
                     map.center.longitude = coordinate.longitude
 
-                    getTz();
-
-                    console.log(coordinate.latitude, coordinate.longitude)
+                    // Pick a TZ lookup method here (quick:offline, accurate:online)
+                    getTzOffline();
                 }
             }
         }
@@ -218,8 +234,7 @@ Column {
 
                 Text {
                     id: tzText
-                    text: tzText.text
-                    //text: qsTr("Timezone: %1").arg(timeZone)
+                    text: qsTr("Timezone: %1").arg(config.currentTimezoneName)
                     color: Kirigami.Theme.textColor
                     anchors.centerIn: parent
                 }