Read map tiler custom style from matrix .well-known file

Closes #6844

features/location/api/src/main/kotlin/io/element/android/features/location/api/internal/MapTilerTileServerStyleUriBuilder.kt

@@ -25,8 +25,23 @@ internal class MapTilerTileServerStyleUriBuilder(
         darkMapId = BuildConfig.MAPTILER_DARK_MAP_ID,
     )
 
-    override fun build(darkMode: Boolean): String {
-        val mapId = if (darkMode) darkMapId else lightMapId
-        return "$baseUrl/$mapId/style.json?key=$apiKey"
+    override fun build(
+        customMapStyleUrl: String?,
+        darkMode: Boolean,
+    ): String {
+        return buildString {
+            if (customMapStyleUrl.isNullOrBlank()) {
+                val mapId = if (darkMode) darkMapId else lightMapId
+                append(baseUrl)
+                append("/")
+                append(mapId)
+                append("/")
+                append("style.json")
+            } else {
+                append(customMapStyleUrl.removeSuffix("/"))
+            }
+            append("?key=")
+            append(apiKey)
+        }
     }
 }

features/location/api/src/main/kotlin/io/element/android/features/location/api/internal/TileServerStyleUriBuilder.kt

@@ -19,21 +19,25 @@ import io.element.android.compound.theme.ElementTheme
  */
 interface TileServerStyleUriBuilder {
     fun build(
+        customMapStyleUrl: String?,
         darkMode: Boolean,
     ): String
 }
 
-fun TileServerStyleUriBuilder(): TileServerStyleUriBuilder = MapTilerTileServerStyleUriBuilder()
-
 /**
  * Provides and remembers a style URI for a MapLibre compatible tile server.
  *
  * Used for rendering dynamic maps.
  */
 @Composable
-fun rememberTileStyleUrl(): String {
+fun rememberTileStyleUrl(
+    customMapStyleUrl: String?,
+): String {
     val darkMode = !ElementTheme.isLightTheme
-    return remember(darkMode) {
-        TileServerStyleUriBuilder().build(darkMode)
+    return remember(darkMode, customMapStyleUrl) {
+        MapTilerTileServerStyleUriBuilder().build(
+            customMapStyleUrl = customMapStyleUrl,
+            darkMode = darkMode,
+        )
     }
 }

features/location/api/src/test/kotlin/io/element/android/features/location/api/internal/MapTilerTileServerStyleUriBuilderTest.kt

@@ -22,14 +22,40 @@ class MapTilerTileServerStyleUriBuilderTest {
     @Test
     fun `light map uri`() {
         assertThat(
-            builder.build(darkMode = false)
+            builder.build(
+                customMapStyleUrl = null,
+                darkMode = false,
+            )
         ).isEqualTo("https://base.url/aLightMapId/style.json?key=anApiKey")
     }
 
     @Test
     fun `dark map uri`() {
         assertThat(
-            builder.build(darkMode = true)
+            builder.build(
+                customMapStyleUrl = null,
+                darkMode = true,
+            )
         ).isEqualTo("https://base.url/aDarkMapId/style.json?key=anApiKey")
     }
+
+    @Test
+    fun `custom map uri light`() {
+        assertThat(
+            builder.build(
+                customMapStyleUrl = "https://custom.url/style.json",
+                darkMode = false,
+            )
+        ).isEqualTo("https://custom.url/style.json?key=anApiKey")
+    }
+
+    @Test
+    fun `custom map uri dark`() {
+        assertThat(
+            builder.build(
+                customMapStyleUrl = "https://custom.url/style.json",
+                darkMode = true,
+            )
+        ).isEqualTo("https://custom.url/style.json?key=anApiKey")
+    }
 }