Add support for searching for hashtags

Also for setting hashtags in change lists using the process mark.
Editing hashtags on individual change screens was already supported.
Selecting hashtags on a change screen will now perform a search for
that tag.

Change-Id: Icc23e10bbf22fbe9b1d958758ec6ceb3286e795b

gertty/search/__init__.py

@@ -60,6 +60,10 @@ class SearchCompiler(object):
             result = and_(gertty.db.change_table.c.account_key == gertty.db.account_table.c.key,
                           result)
             tables.remove(gertty.db.account_table)
+        if gertty.db.hashtag_table in tables:
+            result = and_(gertty.db.hashtag_table.c.change_key == gertty.db.change_table.c.key,
+                          result)
+            tables.remove(gertty.db.hashtag_table)
         if gertty.db.file_table in tables:
             # We only want to look at files for the most recent
             # revision.

gertty/search/parser.py

@@ -87,6 +87,7 @@ def SearchParser():
                 | project_key_term
                 | branch_term
                 | topic_term
+                | hashtag_term
                 | ref_term
                 | label_term
                 | message_term
@@ -203,6 +204,13 @@ def SearchParser():
             p[0] = and_(gertty.db.change_table.c.topic.isnot(None),
                         gertty.db.change_table.c.topic == p[2])
 
+    def p_hashtag_term(p):
+        '''hashtag_term : OP_HASHTAG string'''
+        if p[2].startswith('^'):
+            p[0] = func.matches(p[2], gertty.db.hashtag_table.c.name)
+        else:
+            p[0] = gertty.db.hashtag_table.c.name == p[2]
+
     def p_ref_term(p):
         '''ref_term : OP_REF string'''
         if p[2].startswith('^'):

gertty/search/tokenizer.py

@@ -29,6 +29,7 @@ operators = {
     '_project_key': 'OP_PROJECT_KEY',  # internal gertty use only
     'branch': 'OP_BRANCH',
     'topic': 'OP_TOPIC',
+    'hashtag': 'OP_HASHTAG',
     'ref': 'OP_REF',
     #'tr': 'OP_TR', # needs trackingids
     #'bug': 'OP_BUG', # needs trackingids

gertty/view/change.py

@@ -595,7 +595,7 @@ class ChangeView(urwid.WidgetWrap):
         self.project_label = mywid.TextButton(u'', on_press=self.searchProject)
         self.branch_label = urwid.Text(u'', wrap='clip')
         self.topic_label = mywid.TextButton(u'', on_press=self.searchTopic)
-        self.hashtags_label = urwid.Text(u'', wrap='clip')
+        self.hashtags_label = mywid.HyperText(u'')
         self.created_label = urwid.Text(u'', wrap='clip')
         self.updated_label = urwid.Text(u'', wrap='clip')
         self.status_label = urwid.Text(u'', wrap='clip')
@@ -735,7 +735,16 @@ class ChangeView(urwid.WidgetWrap):
             self.project_label.text.set_text(('change-data', change.project.name))
             self.branch_label.set_text(('change-data', change.branch))
             self.topic_label.text.set_text(('change-data', self.topic))
-            self.hashtags_label.set_text(('change-data', ' '.join([x.name for x in change.hashtags])))
+            hashtag_buttons = []
+            for x in change.hashtags:
+                if hashtag_buttons:
+                    hashtag_buttons.append(' ')
+                link = mywid.Link(x.name, 'change-data', 'focused-change-data')
+                urwid.connect_signal(
+                    link, 'selected',
+                    lambda link, x=x: self.searchHashtags(x.name))
+                hashtag_buttons.append(link)
+            self.hashtags_label.set_text(('change-data', hashtag_buttons or u''))
             self.created_label.set_text(('change-data', str(self.app.time(change.created))))
             self.updated_label.set_text(('change-data', str(self.app.time(change.updated))))
             stat = change.wip and 'WIP' or change.status
@@ -1300,6 +1309,9 @@ class ChangeView(urwid.WidgetWrap):
         if self.topic:
             self.app.doSearch("status:open topic:%s" % (self.topic,))
 
+    def searchHashtags(self, name):
+        self.app.doSearch("status:open hashtag:%s" % (name,))
+
     def reviewKey(self, reviewkey):
         approvals = {}
         for a in reviewkey['approvals']:

gertty/view/change_list.py

@@ -362,6 +362,8 @@ class ChangeListView(urwid.WidgetWrap, mywid.Searchable):
              "Abandon the marked changes"),
             (keymap.EDIT_TOPIC,
              "Set the topic of the marked changes"),
+            (keymap.EDIT_HASHTAGS,
+             "Edit the hashtags of this change"),
             (keymap.RESTORE_CHANGE,
              "Restore the marked changes"),
             (keymap.REFRESH,
@@ -755,6 +757,9 @@ class ChangeListView(urwid.WidgetWrap, mywid.Searchable):
         if keymap.EDIT_TOPIC in commands:
             self.editTopic()
             return True
+        if keymap.EDIT_HASHTAGS in commands:
+            self.editHashtags()
+            return None
         if keymap.REFRESH in commands:
             if self.project_key:
                 self.app.sync.submitTask(
@@ -880,6 +885,31 @@ class ChangeListView(urwid.WidgetWrap, mywid.Searchable):
         self.app.backScreen()
         self.refresh()
 
+    def editHashtags(self):
+        dialog = view_change.EditHashtagsDialog(self.app, '')
+        urwid.connect_signal(dialog, 'save',
+            lambda button: self.closeEditHashtags(dialog, True))
+        urwid.connect_signal(dialog, 'cancel',
+            lambda button: self.closeEditHashtags(dialog, False))
+        self.app.popup(dialog)
+
+    def closeEditHashtags(self, dialog, save):
+        if save:
+            rows = [row for row in self.change_rows.values() if row.mark]
+            if not rows:
+                pos = self.listbox.focus_position
+                rows = [self.listbox.body[pos]]
+            change_keys = [row.change_key for row in rows]
+            with self.app.db.getSession() as session:
+                for change_key in change_keys:
+                    change = session.getChange(change_key)
+                    change.setHashtags([x.strip() for x in dialog.entry.edit_text.split(',')])
+                    change.pending_hashtags = True
+                    self.app.sync.submitTask(
+                        sync.SetHashtagsTask(change_key, sync.HIGH_PRIORITY))
+        self.app.backScreen()
+        self.refresh()
+
     def abandonChange(self):
         dialog = mywid.TextEditDialog(u'Abandon Change', u'Abandon message:',
                                       u'Abandon Change', u'')