[RFC PATCH 5/5] cli: add support for deduplicating based on case insensitive address

[Jani Nikula <jani@nikula.org>]

Consider all variants of an email address as one, and print the most
common variant.
---
 notmuch-search.c | 33 ++++++++++++++++++++++++++++++++-
 1 file changed, 32 insertions(+), 1 deletion(-)

diff --git a/notmuch-search.c b/notmuch-search.c
index 60311393198d..537298788ab9 100644
--- a/notmuch-search.c
+++ b/notmuch-search.c
@@ -447,6 +447,31 @@ _list_free_for_g_hash (void *ptr)
     g_list_free_full (ptr, _talloc_free_for_g_hash);
 }
 
+/* Print the most common variant of a list of unique mailboxes, and
+ * conflate the counts. */
+static void
+print_popular (const search_context_t *ctx, GList *list)
+{
+    GList *l;
+    mailbox_t *mailbox = NULL, *m;
+    int max = 0;
+    int total = 0;
+
+    for (l = list; l; l = l->next) {
+	m = l->data;
+	total += m->count;
+	if (m->count > max) {
+	    mailbox = m;
+	    max = m->count;
+	}
+    }
+
+    /* The original count is no longer needed, so overwrite. */
+    mailbox->count = total;
+
+    print_mailbox (ctx, mailbox);
+}
+
 static void
 print_list_value (void *mailbox, void *context)
 {
@@ -456,7 +481,12 @@ print_list_value (void *mailbox, void *context)
 static void
 print_hash_value (unused (void *key), void *list, void *context)
 {
-    g_list_foreach (list, print_list_value, context);
+    const search_context_t *ctx = context;
+
+    if (ctx->dupe == 1)
+	print_popular (ctx, list);
+    else
+	g_list_foreach (list, print_list_value, context);
 }
 
 static int
@@ -817,6 +847,7 @@ notmuch_address_command (notmuch_config_t *config, int argc, char *argv[])
 	{ NOTMUCH_OPT_KEYWORD, &ctx->dupe, "deduplicate", 'x',
 	  (notmuch_keyword_t []){ { "yes", -1 },
 				  { "no", 0 },
+				  { "address", 1 },
 				  { 0, 0 } } },
 	{ NOTMUCH_OPT_INHERIT, (void *) &common_options, NULL, 0, 0 },
 	{ NOTMUCH_OPT_INHERIT, (void *) &notmuch_shared_options, NULL, 0, 0 },
-- 
2.1.4