1 files changed, 177 insertions, 0 deletions
diff --git a/java/com/android/incallui/calllocation/impl/LocationUrlBuilder.java b/java/com/android/incallui/calllocation/impl/LocationUrlBuilder.java
new file mode 100644
index 000000000..a57bdf613
--- /dev/null
+++ b/java/com/android/incallui/calllocation/impl/LocationUrlBuilder.java
@@ -0,0 +1,177 @@
+/*
+ * Copyright (C) 2017 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License
+ */
+
+package com.android.incallui.calllocation.impl;
+
+import android.content.Context;
+import android.content.Intent;
+import android.content.res.Resources;
+import android.location.Location;
+import android.net.Uri;
+import android.support.annotation.Nullable;
+import android.support.annotation.VisibleForTesting;
+import java.util.Locale;
+
+class LocationUrlBuilder {
+
+  // Static Map API path constants.
+  private static final String HTTPS_SCHEME = "https";
+  private static final String MAPS_API_DOMAIN = "maps.googleapis.com";
+  private static final String MAPS_PATH = "maps";
+  private static final String API_PATH = "api";
+  private static final String STATIC_MAP_PATH = "staticmap";
+  private static final String GEOCODE_PATH = "geocode";
+  private static final String GEOCODE_OUTPUT_TYPE = "json";
+
+  // Static Map API parameter constants.
+  private static final String KEY_PARAM_KEY = "key";
+  private static final String CENTER_PARAM_KEY = "center";
+  private static final String ZOOM_PARAM_KEY = "zoom";
+  private static final String SCALE_PARAM_KEY = "scale";
+  private static final String SIZE_PARAM_KEY = "size";
+  private static final String MARKERS_PARAM_KEY = "markers";
+
+  private static final String ZOOM_PARAM_VALUE = Integer.toString(16);
+
+  private static final String LAT_LONG_DELIMITER = ",";
+
+  private static final String MARKER_DELIMITER = "|";
+  private static final String MARKER_STYLE_DELIMITER = ":";
+  private static final String MARKER_STYLE_COLOR = "color";
+  private static final String MARKER_STYLE_COLOR_RED = "red";
+
+  private static final String LAT_LNG_PARAM_KEY = "latlng";
+
+  private static final String ANDROID_API_KEY_VALUE = "AIzaSyAXdDnif6B7sBYxU8hzw9qAp3pRPVHs060";
+  private static final String BROWSER_API_KEY_VALUE = "AIzaSyBfLlvWYndiQ3RFEHli65qGQH36QIxdyCI";
+
+  /**
+   * Generates the URL to a static map image for the given location.
+   *
+   * <p>This image has the following characteristics:
+   *
+   * <p>- It is centered at the given latitude and longitutde. - It is scaled according to the
+   * device's pixel density. - There is a red marker at the given latitude and longitude.
+   *
+   * <p>Source: https://developers.google.com/maps/documentation/staticmaps/
+   *
+   * @param contxt The context.
+   * @param Location A location.
+   * @return The URL of a static map image url of the given location.
+   */
+  public static String getStaticMapUrl(Context context, Location location) {
+    final Uri.Builder builder = new Uri.Builder();
+    Resources res = context.getResources();
+    String size =
+        res.getDimensionPixelSize(R.dimen.location_map_width)
+            + "x"
+            + res.getDimensionPixelSize(R.dimen.location_map_height);
+
+    builder
+        .scheme(HTTPS_SCHEME)
+        .authority(MAPS_API_DOMAIN)
+        .appendPath(MAPS_PATH)
+        .appendPath(API_PATH)
+        .appendPath(STATIC_MAP_PATH)
+        .appendQueryParameter(CENTER_PARAM_KEY, getFormattedLatLng(location))
+        .appendQueryParameter(ZOOM_PARAM_KEY, ZOOM_PARAM_VALUE)
+        .appendQueryParameter(SIZE_PARAM_KEY, size)
+        .appendQueryParameter(SCALE_PARAM_KEY, Float.toString(res.getDisplayMetrics().density))
+        .appendQueryParameter(MARKERS_PARAM_KEY, getMarkerUrlParamValue(location))
+        .appendQueryParameter(KEY_PARAM_KEY, ANDROID_API_KEY_VALUE);
+
+    return builder.build().toString();
+  }
+
+  /**
+   * Generates the URL for a request to reverse geocode the given location.
+   *
+   * <p>Source: https://developers.google.com/maps/documentation/geocoding/#ReverseGeocoding
+   *
+   * @param Location A location.
+   */
+  public static String getReverseGeocodeUrl(Location location) {
+    final Uri.Builder builder = new Uri.Builder();
+
+    builder
+        .scheme(HTTPS_SCHEME)
+        .authority(MAPS_API_DOMAIN)
+        .appendPath(MAPS_PATH)
+        .appendPath(API_PATH)
+        .appendPath(GEOCODE_PATH)
+        .appendPath(GEOCODE_OUTPUT_TYPE)
+        .appendQueryParameter(LAT_LNG_PARAM_KEY, getFormattedLatLng(location))
+        .appendQueryParameter(KEY_PARAM_KEY, BROWSER_API_KEY_VALUE);
+
+    return builder.build().toString();
+  }
+
+  public static Intent getShowMapIntent(
+      Location location, @Nullable CharSequence addressLine1, @Nullable CharSequence addressLine2) {
+
+    String latLong = getFormattedLatLng(location);
+    String url = String.format(Locale.US, "geo: %s?q=%s", latLong, latLong);
+
+    // Add a map label
+    if (addressLine1 != null) {
+      if (addressLine2 != null) {
+        url +=
+            String.format(Locale.US, "(%s, %s)", addressLine1.toString(), addressLine2.toString());
+      } else {
+        url += String.format(Locale.US, "(%s)", addressLine1.toString());
+      }
+    } else {
+      // TODO: i18n
+      url +=
+          String.format(
+              Locale.US,
+              "(Latitude: %f, Longitude: %f)",
+              location.getLatitude(),
+              location.getLongitude());
+    }
+
+    Intent intent = new Intent(Intent.ACTION_VIEW, Uri.parse(url));
+    intent.setPackage("com.google.android.apps.maps");
+    return intent;
+  }
+
+  /**
+   * Returns a comma-separated latitude and longitude pair, formatted for use as a URL parameter
+   * value.
+   *
+   * @param location A location.
+   * @return The comma-separated latitude and longitude pair of that location.
+   */
+  @VisibleForTesting
+  static String getFormattedLatLng(Location location) {
+    return location.getLatitude() + LAT_LONG_DELIMITER + location.getLongitude();
+  }
+
+  /**
+   * Returns the URL parameter value for the marker, specifying its style and position.
+   *
+   * @param location A location.
+   * @return The URL parameter value for the marker.
+   */
+  @VisibleForTesting
+  static String getMarkerUrlParamValue(Location location) {
+    return MARKER_STYLE_COLOR
+        + MARKER_STYLE_DELIMITER
+        + MARKER_STYLE_COLOR_RED
+        + MARKER_DELIMITER
+        + getFormattedLatLng(location);
+  }
+}