pt 1 in reviving the android build (copied from pm 28a1, wish me luck)

mobile/android/base/java/org/mozilla/gecko/SuggestClient.java

@@ -0,0 +1,142 @@
+/* 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/. */
+
+package org.mozilla.gecko;
+
+import java.io.BufferedInputStream;
+import java.io.IOException;
+import java.io.InputStream;
+import java.net.HttpURLConnection;
+import java.net.URL;
+import java.net.URLEncoder;
+import java.util.ArrayList;
+
+import org.json.JSONArray;
+import org.mozilla.gecko.annotation.RobocopTarget;
+import org.mozilla.gecko.util.HardwareUtils;
+
+import android.content.Context;
+import android.text.TextUtils;
+import android.util.Log;
+import org.mozilla.gecko.util.NetworkUtils;
+
+/**
+ * Use network-based search suggestions.
+ */
+public class SuggestClient {
+    private static final String LOGTAG = "GeckoSuggestClient";
+
+    // This should go through GeckoInterface to get the UA, but the search activity
+    // doesn't use a GeckoView yet. Until it does, get the UA directly.
+    private static final String USER_AGENT = HardwareUtils.isTablet() ?
+        AppConstants.USER_AGENT_FENNEC_TABLET : AppConstants.USER_AGENT_FENNEC_MOBILE;
+
+    private final Context mContext;
+    private final int mTimeout;
+
+    // should contain the string "__searchTerms__", which is replaced with the query
+    private final String mSuggestTemplate;
+
+    // the maximum number of suggestions to return
+    private final int mMaxResults;
+
+    // used by robocop for testing
+    private final boolean mCheckNetwork;
+
+    // used to make suggestions appear instantly after opt-in
+    private String mPrevQuery;
+    private ArrayList<String> mPrevResults;
+
+    @RobocopTarget
+    public SuggestClient(Context context, String suggestTemplate, int timeout, int maxResults, boolean checkNetwork) {
+        mContext = context;
+        mMaxResults = maxResults;
+        mSuggestTemplate = suggestTemplate;
+        mTimeout = timeout;
+        mCheckNetwork = checkNetwork;
+    }
+
+    public String getSuggestTemplate() {
+        return mSuggestTemplate;
+    }
+
+    /**
+     * Queries for a given search term and returns an ArrayList of suggestions.
+     */
+    public ArrayList<String> query(String query) {
+        if (query.equals(mPrevQuery))
+            return mPrevResults;
+
+        ArrayList<String> suggestions = new ArrayList<String>();
+        if (TextUtils.isEmpty(mSuggestTemplate) || TextUtils.isEmpty(query)) {
+            return suggestions;
+        }
+
+        if (!NetworkUtils.isConnected(mContext) && mCheckNetwork) {
+            Log.i(LOGTAG, "Not connected to network");
+            return suggestions;
+        }
+
+        try {
+            String encoded = URLEncoder.encode(query, "UTF-8");
+            String suggestUri = mSuggestTemplate.replace("__searchTerms__", encoded);
+
+            URL url = new URL(suggestUri);
+            String json = null;
+            HttpURLConnection urlConnection = null;
+            InputStream in = null;
+            try {
+                urlConnection = (HttpURLConnection) url.openConnection();
+                urlConnection.setConnectTimeout(mTimeout);
+                urlConnection.setRequestProperty("User-Agent", USER_AGENT);
+                in = new BufferedInputStream(urlConnection.getInputStream());
+                json = convertStreamToString(in);
+            } finally {
+                if (urlConnection != null)
+                    urlConnection.disconnect();
+                if (in != null) {
+                    try {
+                        in.close();
+                    } catch (IOException e) {
+                        Log.e(LOGTAG, "error", e);
+                    }
+                }
+            }
+
+            if (json != null) {
+                /*
+                 * Sample result:
+                 * ["foo",["food network","foothill college","foot locker",...]]
+                 */
+                JSONArray results = new JSONArray(json);
+                JSONArray jsonSuggestions = results.getJSONArray(1);
+
+                int added = 0;
+                for (int i = 0; (i < jsonSuggestions.length()) && (added < mMaxResults); i++) {
+                    String suggestion = jsonSuggestions.getString(i);
+                    if (!suggestion.equalsIgnoreCase(query)) {
+                        suggestions.add(suggestion);
+                        added++;
+                    }
+                }
+            } else {
+                Log.e(LOGTAG, "Suggestion query failed");
+            }
+        } catch (Exception e) {
+            Log.e(LOGTAG, "Error", e);
+        }
+
+        mPrevQuery = query;
+        mPrevResults = suggestions;
+        return suggestions;
+    }
+
+    private String convertStreamToString(java.io.InputStream is) {
+        try {
+            return new java.util.Scanner(is).useDelimiter("\\A").next();
+        } catch (java.util.NoSuchElementException e) {
+            return "";
+        }
+    }
+}