From 5a09515d0f0f595a2e6f3662499b324ba63d014d Mon Sep 17 00:00:00 2001
From: Anton Khirnov <anton@khirnov.net>
Date: Mon, 29 Nov 2021 16:49:02 +0100
Subject: commands/search: allow reversing search results

---
 alot/commands/globals.py | 11 +++++++++--
 alot/commands/search.py  | 28 ++++++++++++++++++++++++----
 2 files changed, 33 insertions(+), 6 deletions(-)

diff --git a/alot/commands/globals.py b/alot/commands/globals.py
index bcd9a2c3..d7d5e250 100644
--- a/alot/commands/globals.py
+++ b/alot/commands/globals.py
@@ -80,6 +80,8 @@ class ExitCommand(Command):
 
 @registerCommand(MODE, 'search', usage='search query', arguments=[
     (['--sort'], {'help': 'sort order', 'choices': list(SORT_NAME.keys())}),
+    (['--reverse'], { 'help' : 'display messages in reverse order',
+                      'action' : 'store_true' }),
     (['query'], {'nargs': argparse.REMAINDER, 'help': 'search string'})])
 class SearchCommand(Command):
 
@@ -87,7 +89,9 @@ class SearchCommand(Command):
     :ref:`search.exclude_tags <search.exclude_tags>` setting."""
     repeatable = True
 
-    def __init__(self, query, sort=None, **kwargs):
+    _reverse = None
+
+    def __init__(self, query, sort=None, reverse = False, **kwargs):
         """
         :param query: notmuch querystring
         :type query: str
@@ -98,6 +102,8 @@ class SearchCommand(Command):
         """
         self.query = ' '.join(query)
         self.order = SORT_NAME[sort] if sort else None
+        self._reverse = reverse
+
         super().__init__(**kwargs)
 
     def apply(self, ui):
@@ -116,7 +122,8 @@ class SearchCommand(Command):
                     ui.update()
             else:
                 ui.buffer_open(buffers.SearchBuffer(ui, self.query,
-                                                    sort_order=self.order))
+                                                    sort_order=self.order,
+                                                    reverse = self._reverse))
         else:
             ui.notify('empty query string')
 
diff --git a/alot/commands/search.py b/alot/commands/search.py
index 27625ce1..e0a4db56 100644
--- a/alot/commands/search.py
+++ b/alot/commands/search.py
@@ -35,19 +35,32 @@ class OpenThreadCommand(Command):
             ui.buffer_open(tb)
             tb.focus_next_matching(query)
 
+_opt_reverse = (['--reverse'],
+    { 'help'    : 'display messages in reverse order',
+      'default' : False,
+      'action'  : 'store_true' }
+)
 
 @registerCommand(MODE, 'refine', help='refine query', arguments=[
     (['--sort'], {'help': 'sort order',
-        'choices': list(SORT_NAME.keys())}),
+        'choices': list(SORT_NAME.keys())}), _opt_reverse,
     (['query'], {'nargs': argparse.REMAINDER, 'help': 'search string'})])
 @registerCommand(MODE, 'sort', help='set sort order', arguments=[
+    _opt_reverse,
     (['sort'], {'help': 'sort order', 'choices': [
         'oldest_first', 'newest_first', 'message_id', 'unsorted']}),
 ])
+@registerCommand(MODE, 'reverse',
+    help   = 'toggle whether the sorting order is reversed',
+    forced = { 'toggle_reverse' : True })
 class RefineCommand(Command):
 
+    _reverse        = None
+    _toggle_reverse = None
+
     """refine the querystring of this buffer"""
-    def __init__(self, query=None, sort=None, **kwargs):
+    def __init__(self, query=None, sort=None, reverse = None,
+                 toggle_reverse = False, **kwargs):
         """
         :param query: new querystring given as list of strings as returned by
                       argparse
@@ -57,11 +70,13 @@ class RefineCommand(Command):
             self.querystring = None
         else:
             self.querystring = ' '.join(query)
-        self.sort_order = SORT_NAME[sort] if sort else None
+        self.sort_order      = SORT_NAME[sort] if sort else None
+        self._reverse        = reverse
+        self._toggle_reverse = toggle_reverse
         super().__init__(**kwargs)
 
     def apply(self, ui):
-        if self.querystring or self.sort_order:
+        if self.querystring or self.sort_order or self._toggle_reverse:
             sbuffer = ui.current_buffer
             oldquery = sbuffer.querystring
             if self.querystring not in [None, oldquery]:
@@ -69,6 +84,11 @@ class RefineCommand(Command):
                 sbuffer = ui.current_buffer
             if self.sort_order:
                 sbuffer.sort_order = self.sort_order
+            if self._reverse is not None:
+                sbuffer.reverse = self._reverse
+            if self._toggle_reverse:
+                sbuffer.reverse = not sbuffer.reverse
+
             sbuffer.rebuild()
             ui.update()
         else:
-- 
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