[ContextualSearch] Adds long press promo for Contextual Search.

chrome/android/java/src/org/chromium/chrome/browser/contextualsearch/ContextualSearchFieldTrial.java

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 package org.chromium.chrome.browser.contextualsearch;
 
 import android.text.TextUtils;
 
 import org.chromium.base.CommandLine;
 import org.chromium.base.SysUtils;
 import org.chromium.chrome.browser.ChromeSwitches;
 import org.chromium.chrome.browser.ChromeVersionInfo;
 import org.chromium.components.variations.VariationsAssociatedData;
 
+import java.text.ParseException;
+import java.text.SimpleDateFormat;
 import java.util.Arrays;
+import java.util.Date;
 import java.util.Locale;
 
 /**
  * Provides Field Trial support for the Contextual Search application within Chrome for Android.
  */
 public class ContextualSearchFieldTrial {
     private static final String FIELD_TRIAL_NAME = "ContextualSearch";
     private static final String ENABLED_PARAM = "enabled";
     private static final String ENABLED_VALUE = "true";
 
     private static final String DISABLE_FOR_CJK = "disable_for_cjk";
     private static final String DISABLE_FOR_CHINESE = "disable_for_chinese";
     private static final String DISABLE_FOR_JAPANESE = "disable_for_japanese";
     private static final String DISABLE_FOR_KOREAN = "disable_for_korean";
 
     // TODO(pedrosimonetti): Confirm if we can delete promo_on_longpress_only now.
     private static final String PROMO_ON_LONGPRESS_ONLY = "promo_on_longpress_only";
     static final String PROMO_ON_LIMITED_TAPS = "promo_on_limited_taps";
     static final String TAP_TRIGGERED_PROMO_LIMIT = "tap_triggered_promo_limit";
     static final String TAP_RESOLVE_LIMIT_FOR_DECIDED = "tap_resolve_limit_for_decided";
     static final String TAP_PREFETCH_LIMIT_FOR_DECIDED = "tap_prefetch_limit_for_decided";
     static final String TAP_RESOLVE_LIMIT_FOR_UNDECIDED = "tap_resolve_limit_for_undecided";
     static final String TAP_PREFETCH_LIMIT_FOR_UNDECIDED = "tap_prefetch_limit_for_undecided";
 
+    static final String PEEK_PROMO_ENABLED = "peek_promo_enabled";
+    static final String PEEK_PROMO_MAX_SHOW_COUNT = "peek_promo_max_show_count";
+    static final String PEEK_PROMO_EXPIRATION_DATE = "peek_promo_expiration_date";
+    private static final String PEEK_PROMO_EXPIRATION_DATE_FORMAT = "yyyy-MM-dd HH:mm:ss";
+    static final int PEEK_PROMO_DEFAULT_MAX_SHOW_COUNT = 10;
+
     private static final String CHINESE_LANGUAGE_CODE = "zh";
     private static final String JAPANESE_LANGUAGE_CODE = "ja";
     private static final String KOREAN_LANGUAGE_CODE = "ko";
     private static final String[] CJK_LANGUAGE_CODES = {CHINESE_LANGUAGE_CODE,
         JAPANESE_LANGUAGE_CODE, KOREAN_LANGUAGE_CODE};
 
     // The default navigation-detection-delay in milliseconds.
     private static final int DEFAULT_TAP_NAVIGATION_DETECTION_DELAY = 16;
     private static final String NAVIGATION_DETECTION_DELAY = "tap_navigation_detection_delay";
 
     private static final int UNLIMITED_TAPS = -1;
     private static final int DEFAULT_TAP_RESOLVE_LIMIT_FOR_DECIDED = UNLIMITED_TAPS;
     private static final int DEFAULT_TAP_PREFETCH_LIMIT_FOR_DECIDED = UNLIMITED_TAPS;
     private static final int DEFAULT_TAP_RESOLVE_LIMIT_FOR_UNDECIDED = 100;
     private static final int DEFAULT_TAP_PREFETCH_LIMIT_FOR_UNDECIDED = 10;
 
     // Cached value to avoid repeated and redundant JNI operations.
     private static Boolean sEnabled;
 
+    private static Boolean sIsPeekPromoEnabled;
+    private static int sPeekPromoMaxCount;
+    private static Date sPeekPromoExpirationDate;
+    private static boolean sPeekPromoExpirationDateCached;
+
     /**
      * Don't instantiate.
      */
     private ContextualSearchFieldTrial() {}
 
     /**
      * Checks the current Variations parameters associated with the active group as well as the
      * Chrome preference to determine if the service is enabled.
      * @return Whether Contextual Search is enabled or not.
      */
@@ skipping 151 matching lines @@
 
     /**
      * @return The limit on the number of prefetches to issue for undecided users, or the default
      *         if no value is present.
      */
     static int getTapPrefetchLimitForUndecided() {
         return getIntParamValueOrDefault(TAP_PREFETCH_LIMIT_FOR_UNDECIDED,
                 DEFAULT_TAP_PREFETCH_LIMIT_FOR_UNDECIDED);
     }
 
+    /**
+     * @return Whether the Peek Promo is enabled.
+     */
+    static boolean isPeekPromoEnabled() {
+        if (sIsPeekPromoEnabled != null) return sIsPeekPromoEnabled;
+
+        sIsPeekPromoEnabled = getBooleanParam(PEEK_PROMO_ENABLED);
+        return sIsPeekPromoEnabled;
+    }
+
+    /**
+     * @return The maximum number of times the Peek Promo should be displayed.
+     */
+    static int getPeekPromoMaxShowCount() {
+        if (sPeekPromoMaxCount > 0) return sPeekPromoMaxCount;
+
+        sPeekPromoMaxCount = getIntParamValueOrDefault(
+                PEEK_PROMO_MAX_SHOW_COUNT,
+                PEEK_PROMO_DEFAULT_MAX_SHOW_COUNT);
+
+        return sPeekPromoMaxCount;
+    }
+
+    /**
+     * @return The expiration date of the Peek Promo, using the format
+     */
+    static Date getPeekPromoExpirationDate() {
+        if (sPeekPromoExpirationDateCached) return sPeekPromoExpirationDate;
+
+        Date expirationDate = null;
+
+        String expirationDateString = getStringParam(PEEK_PROMO_EXPIRATION_DATE);
+        if (expirationDateString != null) {
+            SimpleDateFormat format =
+                    new SimpleDateFormat(PEEK_PROMO_EXPIRATION_DATE_FORMAT, Locale.US);
+            try {
+                expirationDate = format.parse(expirationDateString);
+            } catch (ParseException e) {
+                e.printStackTrace();
+            }
+        }
+
+        sPeekPromoExpirationDateCached = true;
+        sPeekPromoExpirationDate = expirationDate;
+        return sPeekPromoExpirationDate;
+    }
+
     // --------------------------------------------------------------------------------------------
     // Helpers.
     // --------------------------------------------------------------------------------------------
 
     /**
      * Gets a boolean Finch parameter, assuming the <paramName>="true" format.  Also checks for a
      * command-line switch with the same name, for easy local testing.
      * @param paramName The name of the Finch parameter (or command-line switch) to get a value for.
      * @return Whether the Finch param is defined with a value "true", if there's a command-line
      *         flag present with any value.
@@ skipping 21 matching lines @@
         if (!TextUtils.isEmpty(value)) {
             try {
                 return Integer.parseInt(value);
             } catch (NumberFormatException e) {
                 return defaultValue;
             }
         }
 
         return defaultValue;
     }
+
+    /**
+     * Returns a string value for a Finch parameter. Also checks for a command-line switch.
+     * @param paramName The name of the Finch parameter (or command-line switch) to get a value for.
+     * @return The command-line value, if present, or the finch parameter value.
+     */
+    private static String getStringParam(String paramName) {
+        if (CommandLine.getInstance().hasSwitch(paramName)) {
+            return CommandLine.getInstance().getSwitchValue(paramName);
+        }
+        return VariationsAssociatedData.getVariationParamValue(FIELD_TRIAL_NAME, paramName);
+    }
 }