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      1 /*
      2  * Copyright (C) 2009 The Android Open Source Project
      3  *
      4  * Licensed under the Apache License, Version 2.0 (the "License");
      5  * you may not use this file except in compliance with the License.
      6  * You may obtain a copy of the License at
      7  *
      8  *      http://www.apache.org/licenses/LICENSE-2.0
      9  *
     10  * Unless required by applicable law or agreed to in writing, software
     11  * distributed under the License is distributed on an "AS IS" BASIS,
     12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     13  * See the License for the specific language governing permissions and
     14  * limitations under the License.
     15  */
     16 
     17 package com.android.quicksearchbox;
     18 
     19 import java.util.Collection;
     20 import java.util.List;
     21 
     22 
     23 /**
     24  * Interface for logging implementations.
     25  */
     26 public interface Logger {
     27 
     28     public static final int SEARCH_METHOD_BUTTON = 0;
     29     public static final int SEARCH_METHOD_KEYBOARD = 1;
     30 
     31     /**
     32      * Called when QSB has started.
     33      *
     34      * @param latency User-visible start-up latency in milliseconds.
     35      */
     36     void logStart(int latency, String intentSource, Corpus corpus,
     37             List<Corpus> orderedCorpora);
     38 
     39     /**
     40      * Called when a suggestion is clicked.
     41      *
     42      * @param position 0-based position of the suggestion in the UI.
     43      * @param suggestionCursor all the suggestions shown in the UI.
     44      * @param queriedCorpora all corpora that were queried to produce the suggestions in
     45      *        {@code suggestionCursor}, ordered by rank.
     46      */
     47     void logSuggestionClick(int position, SuggestionCursor suggestionCursor,
     48             Collection<Corpus> queriedCorpora);
     49 
     50     /**
     51      * The user launched a search.
     52      *
     53      * @param startMethod One of {@link #SEARCH_METHOD_BUTTON} or {@link #SEARCH_METHOD_KEYBOARD}.
     54      * @param numChars The number of characters in the query.
     55      */
     56     void logSearch(Corpus corpus, int startMethod, int numChars);
     57 
     58     /**
     59      * The user launched a voice search.
     60      */
     61     void logVoiceSearch(Corpus corpus);
     62 
     63     /**
     64      * The user left QSB without performing any action (click suggestions, search or voice search).
     65      *
     66      * @param suggestionCursor all the suggestions shown in the UI when the user left
     67      * @param numChars The number of characters in the query typed when the user left.
     68      */
     69     void logExit(SuggestionCursor suggestionCursor, int numChars);
     70 
     71     /**
     72      * Logs the latency of a suggestion query to a specific source.
     73      *
     74      * @param result The result of the query.
     75      */
     76     void logLatency(CorpusResult result);
     77 
     78 }
     79