1 // Copyright (c) 2013 The Chromium Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 // 5 // An object to record and send user feedback to spelling service. The spelling 6 // service uses the feedback to improve its suggestions. 7 // 8 // Assigns uint32 hash identifiers to spelling suggestions from spelling service 9 // and stores these suggestions. Records user's actions on these suggestions. 10 // Periodically sends batches of user feedback to the spelling service. 11 12 #ifndef CHROME_BROWSER_SPELLCHECKER_FEEDBACK_SENDER_H_ 13 #define CHROME_BROWSER_SPELLCHECKER_FEEDBACK_SENDER_H_ 14 15 #include <map> 16 #include <set> 17 #include <vector> 18 19 #include "base/memory/scoped_vector.h" 20 #include "base/memory/weak_ptr.h" 21 #include "base/timer/timer.h" 22 #include "chrome/browser/spellchecker/feedback.h" 23 #include "chrome/browser/spellchecker/misspelling.h" 24 #include "net/url_request/url_fetcher_delegate.h" 25 #include "url/gurl.h" 26 27 class SpellCheckMarker; 28 struct SpellCheckResult; 29 30 namespace net { 31 class URLFetcher; 32 class URLRequestContextGetter; 33 } 34 35 namespace spellcheck { 36 37 namespace { 38 39 // Constants for the feedback field trial. 40 const char kFeedbackFieldTrialName[] = "SpellingServiceFeedback"; 41 const char kFeedbackFieldTrialEnabledGroupName[] = "Enabled"; 42 43 } // namespace 44 45 // Stores and sends user feedback to the spelling service. Sample usage: 46 // FeedbackSender sender(profile.GetRequestContext(), language, country); 47 // sender.OnSpellcheckResults(spellcheck_results_from_spelling_service, 48 // renderer_process_id, 49 // spellchecked_text, 50 // existing_hashes); 51 // sender.SelectedSuggestion(hash, suggestion_index); 52 class FeedbackSender : public base::SupportsWeakPtr<FeedbackSender>, 53 public net::URLFetcherDelegate { 54 public: 55 // Constructs a feedback sender. Keeps |request_context| in a scoped_refptr, 56 // because URLRequestContextGetter implements RefcountedThreadSafe. 57 FeedbackSender(net::URLRequestContextGetter* request_context, 58 const std::string& language, 59 const std::string& country); 60 virtual ~FeedbackSender(); 61 62 // Records that user selected suggestion |suggestion_index| for the 63 // misspelling identified by |hash|. 64 void SelectedSuggestion(uint32 hash, int suggestion_index); 65 66 // Records that user added the misspelling identified by |hash| to the 67 // dictionary. 68 void AddedToDictionary(uint32 hash); 69 70 // Records that user right-clicked on the misspelling identified by |hash|, 71 // but did not select any suggestion. 72 void IgnoredSuggestions(uint32 hash); 73 74 // Records that user did not choose any suggestion but manually corrected the 75 // misspelling identified by |hash| to string |correction|, which is not in 76 // the list of suggestions. 77 void ManuallyCorrected(uint32 hash, const string16& correction); 78 79 // Records that user has the misspelling in the custom dictionary. The user 80 // will never see the spellcheck suggestions for the misspelling. 81 void RecordInDictionary(uint32 hash); 82 83 // Receives document markers for renderer with process ID |render_process_id| 84 // when the renderer responds to a RequestDocumentMarkers() call. Finalizes 85 // feedback for the markers that are gone from the renderer. Sends feedback 86 // data for the renderer with process ID |renderer_process_id| to the spelling 87 // service. If the current session has expired, then refreshes the session 88 // start timestamp and sends out all of the feedback data. 89 void OnReceiveDocumentMarkers(int renderer_process_id, 90 const std::vector<uint32>& markers); 91 92 // Generates feedback data based on spellcheck results. The new feedback data 93 // is pending. Sets hash identifiers for |results|. Called when spelling 94 // service client receives results from the spelling service. Does not take 95 // ownership of |results|. 96 void OnSpellcheckResults(int renderer_process_id, 97 const string16& text, 98 const std::vector<SpellCheckMarker>& markers, 99 std::vector<SpellCheckResult>* results); 100 101 // Receives updated language and country code for feedback. Finalizes and 102 // sends out all of the feedback data. 103 void OnLanguageCountryChange(const std::string& language, 104 const std::string& country); 105 106 private: 107 friend class FeedbackSenderTest; 108 109 // net::URLFetcherDelegate implementation. Takes ownership of |source|. 110 virtual void OnURLFetchComplete(const net::URLFetcher* source) OVERRIDE; 111 112 // Requests the document markers from all of the renderers to determine which 113 // feedback can be finalized. Finalizes feedback for renderers that are gone. 114 // Called periodically when |timer_| fires. 115 void RequestDocumentMarkers(); 116 117 // Sends out all feedback data. Resets the session-start timestamp to now. 118 // Restarts the timer that requests markers from the renderers. 119 void FlushFeedback(); 120 121 // Sends out the |feedback_data|. 122 void SendFeedback(const std::vector<Misspelling>& feedback_data, 123 bool is_first_feedback_batch); 124 125 // URL request context for the feedback senders. 126 scoped_refptr<net::URLRequestContextGetter> request_context_; 127 128 // The language of text. The string is a BCP 47 language tag. 129 std::string language_; 130 131 // The country of origin. The string is the ISO 3166-1 alpha-3 code. 132 std::string country_; 133 134 // Misspelling counter used to generate unique hash identifier for each 135 // misspelling. 136 size_t misspelling_counter_; 137 138 // Feedback data. 139 Feedback feedback_; 140 141 // A set of renderer process IDs for renderers that have sent out feedback in 142 // this session. 143 std::set<int> renderers_sent_feedback_; 144 145 // When the session started. 146 base::Time session_start_; 147 148 // The URL where the feedback data should be sent. 149 GURL feedback_service_url_; 150 151 // A timer to periodically request a list of document spelling markers from 152 // all of the renderers. The timer runs while an instance of this class is 153 // alive. 154 base::RepeatingTimer<FeedbackSender> timer_; 155 156 // Feedback senders that need to stay alive for the duration of sending data. 157 // If a sender is destroyed before it finishes, then sending feedback will be 158 // canceled. 159 ScopedVector<net::URLFetcher> senders_; 160 161 DISALLOW_COPY_AND_ASSIGN(FeedbackSender); 162 }; 163 164 } // namespace spellcheck 165 166 #endif // CHROME_BROWSER_SPELLCHECKER_FEEDBACK_SENDER_H_ 167