This new JSON format for replies includes headers generated for a reply
message as well as the headers and all text parts of the original message.
Using this data, a client can intelligently create a reply. For example,
the emacs client will be able to create replies with quoted HTML parts by
parsing the HTML parts using w3m.
---
 notmuch-reply.c |  271 +++++++++++++++++++++++++++++++++++++++++++++++--------
 1 files changed, 231 insertions(+), 40 deletions(-)

diff --git a/notmuch-reply.c b/notmuch-reply.c
index 0f682db..b4c2426 100644
--- a/notmuch-reply.c
+++ b/notmuch-reply.c
@@ -30,6 +30,15 @@ reply_headers_message_part (GMimeMessage *message);
 static void
 reply_part_content (GMimeObject *part);
 
+static void
+reply_part_start_json (GMimeObject *part, int *part_count);
+
+static void
+reply_part_content_json (GMimeObject *part);
+
+static void
+reply_part_end_json (GMimeObject *part);
+
 static const notmuch_show_format_t format_reply = {
     "",
        "", NULL,
@@ -46,6 +55,22 @@ static const notmuch_show_format_t format_reply = {
     ""
 };
 
+static const notmuch_show_format_t format_json = {
+    "",
+       "", NULL,
+           "", NULL, NULL, "",
+           "",
+               reply_part_start_json,
+               NULL,
+               NULL,
+               reply_part_content_json,
+               reply_part_end_json,
+               "",
+           "",
+       "", "",
+    ""
+};
+
 static void
 show_reply_headers (GMimeMessage *message)
 {
@@ -86,6 +111,17 @@ reply_headers_message_part (GMimeMessage *message)
     printf ("> Date: %s\n", g_mime_message_get_date_as_string (message));
 }
 
+static notmuch_bool_t
+reply_check_part_type (GMimeObject *part, const char *type, const char 
*subtype,
+                      const char *disposition)
+{
+    GMimeContentType *content_type = g_mime_object_get_content_type 
(GMIME_OBJECT (part));
+    GMimeContentDisposition *part_disposition = 
g_mime_object_get_content_disposition (part);
+
+    return (g_mime_content_type_is_type (content_type, type, subtype) &&
+           (!part_disposition ||
+            strcmp (part_disposition->disposition, disposition) == 0));
+}
 
 static void
 reply_part_content (GMimeObject *part)
@@ -147,6 +183,63 @@ reply_part_content (GMimeObject *part)
     }
 }
 
+static void
+reply_part_start_json (GMimeObject *part, unused (int *part_count))
+{
+    if (reply_check_part_type (part, "text", "*", GMIME_DISPOSITION_INLINE))
+       printf ("{ ");
+}
+
+static void
+reply_part_end_json (GMimeObject *part)
+{
+    if (reply_check_part_type (part, "text", "*", GMIME_DISPOSITION_INLINE))
+       printf ("}, ");
+}
+
+static void
+reply_part_content_json (GMimeObject *part)
+{
+    GMimeContentType *content_type = g_mime_object_get_content_type 
(GMIME_OBJECT (part));
+    void *ctx = talloc_new (NULL);
+
+    /* We only care about inline text parts for reply purposes */
+    if (reply_check_part_type (part, "text", "*", GMIME_DISPOSITION_INLINE)) {
+       GMimeDataWrapper *wrapper;
+       GByteArray *part_content;
+
+       printf ("\"content-type\": %s, \"content\": ",
+              json_quote_str (ctx, g_mime_content_type_to_string 
(content_type)));
+
+       wrapper = g_mime_part_get_content_object (GMIME_PART (part));
+       if (wrapper) {
+           const char *charset = g_mime_object_get_content_type_parameter 
(part, "charset");
+           GMimeStream *stream_memory = g_mime_stream_mem_new ();
+           if (stream_memory) {
+               GMimeStream *stream_filter = NULL;
+               stream_filter = g_mime_stream_filter_new (stream_memory);
+               if (charset) {
+                   g_mime_stream_filter_add (GMIME_STREAM_FILTER 
(stream_filter),
+                                             g_mime_filter_charset_new 
(charset, "UTF-8"));
+               }
+
+               if (stream_filter) {
+                   g_mime_data_wrapper_write_to_stream (wrapper, 
stream_filter);
+                   part_content = g_mime_stream_mem_get_byte_array 
(GMIME_STREAM_MEM (stream_memory));
+
+                   printf ("%s", json_quote_chararray (ctx, (char *) 
part_content->data, part_content->len));
+                   g_object_unref (stream_filter);
+               }
+           }
+
+           if (stream_memory)
+               g_object_unref (stream_memory);
+       }
+    }
+
+    talloc_free (ctx);
+}
+
 /* Is the given address configured as one of the user's "personal" or
  * "other" addresses. */
 static int
@@ -505,6 +598,61 @@ guess_from_received_header (notmuch_config_t *config, 
notmuch_message_t *message
     return NULL;
 }
 
+static GMimeMessage *
+create_reply_message(void *ctx,
+                    notmuch_config_t *config,
+                    notmuch_message_t *message,
+                    notmuch_bool_t reply_all)
+{
+    const char *subject, *from_addr = NULL;
+    const char *in_reply_to, *orig_references, *references;
+
+    /* The 1 means we want headers in a "pretty" order. */
+    GMimeMessage *reply = g_mime_message_new (1);
+    if (reply == NULL) {
+       fprintf (stderr, "Out of memory\n");
+       return NULL;
+    }
+
+    subject = notmuch_message_get_header (message, "subject");
+    if (subject) {
+       if (strncasecmp (subject, "Re:", 3))
+           subject = talloc_asprintf (ctx, "Re: %s", subject);
+       g_mime_message_set_subject (reply, subject);
+    }
+
+    from_addr = add_recipients_from_message (reply, config,
+                                            message, reply_all);
+
+    if (from_addr == NULL)
+       from_addr = guess_from_received_header (config, message);
+
+    if (from_addr == NULL)
+       from_addr = notmuch_config_get_user_primary_email (config);
+
+    from_addr = talloc_asprintf (ctx, "%s <%s>",
+                                notmuch_config_get_user_name (config),
+                                from_addr);
+    g_mime_object_set_header (GMIME_OBJECT (reply),
+                             "From", from_addr);
+
+    in_reply_to = talloc_asprintf (ctx, "<%s>",
+                                  notmuch_message_get_message_id (message));
+
+    g_mime_object_set_header (GMIME_OBJECT (reply),
+                             "In-Reply-To", in_reply_to);
+
+    orig_references = notmuch_message_get_header (message, "references");
+    references = talloc_asprintf (ctx, "%s%s%s",
+                                 orig_references ? orig_references : "",
+                                 orig_references ? " " : "",
+                                 in_reply_to);
+    g_mime_object_set_header (GMIME_OBJECT (reply),
+                             "References", references);
+
+    return reply;
+}
+
 static int
 notmuch_reply_format_default(void *ctx,
                             notmuch_config_t *config,
@@ -515,8 +663,6 @@ notmuch_reply_format_default(void *ctx,
     GMimeMessage *reply;
     notmuch_messages_t *messages;
     notmuch_message_t *message;
-    const char *subject, *from_addr = NULL;
-    const char *in_reply_to, *orig_references, *references;
     const notmuch_show_format_t *format = &format_reply;
 
     for (messages = notmuch_query_search_messages (query);
@@ -525,62 +671,103 @@ notmuch_reply_format_default(void *ctx,
     {
        message = notmuch_messages_get (messages);
 
-       /* The 1 means we want headers in a "pretty" order. */
-       reply = g_mime_message_new (1);
-       if (reply == NULL) {
-           fprintf (stderr, "Out of memory\n");
-           return 1;
-       }
+       reply = create_reply_message (ctx, config, message, reply_all);
 
-       subject = notmuch_message_get_header (message, "subject");
-       if (subject) {
-           if (strncasecmp (subject, "Re:", 3))
-               subject = talloc_asprintf (ctx, "Re: %s", subject);
-           g_mime_message_set_subject (reply, subject);
-       }
+       if (!reply)
+           continue;
 
-       from_addr = add_recipients_from_message (reply, config, message,
-                                                reply_all);
+       show_reply_headers (reply);
 
-       if (from_addr == NULL)
-           from_addr = guess_from_received_header (config, message);
+       g_object_unref (G_OBJECT (reply));
+       reply = NULL;
 
-       if (from_addr == NULL)
-           from_addr = notmuch_config_get_user_primary_email (config);
+       printf ("On %s, %s wrote:\n",
+               notmuch_message_get_header (message, "date"),
+               notmuch_message_get_header (message, "from"));
 
-       from_addr = talloc_asprintf (ctx, "%s <%s>",
-                                    notmuch_config_get_user_name (config),
-                                    from_addr);
-       g_mime_object_set_header (GMIME_OBJECT (reply),
-                                 "From", from_addr);
+       show_message_body (message, format, params);
 
-       in_reply_to = talloc_asprintf (ctx, "<%s>",
-                            notmuch_message_get_message_id (message));
+       notmuch_message_destroy (message);
+    }
+    return 0;
+}
 
-       g_mime_object_set_header (GMIME_OBJECT (reply),
-                                 "In-Reply-To", in_reply_to);
+static int
+notmuch_reply_format_json(void *ctx,
+                         notmuch_config_t *config,
+                         notmuch_query_t *query,
+                         unused (notmuch_show_params_t *params),
+                         notmuch_bool_t reply_all)
+{
+    GMimeMessage *reply;
+    notmuch_messages_t *messages;
+    notmuch_message_t *message;
+    const notmuch_show_format_t *format = &format_json;
 
-       orig_references = notmuch_message_get_header (message, "references");
-       references = talloc_asprintf (ctx, "%s%s%s",
-                                     orig_references ? orig_references : "",
-                                     orig_references ? " " : "",
-                                     in_reply_to);
-       g_mime_object_set_header (GMIME_OBJECT (reply),
-                                 "References", references);
+    const char *reply_headers[] = {"from", "to", "subject", "in-reply-to", 
"references"};
+    const char *orig_headers[] = {"from", "to", "cc", "subject", "date", 
"in-reply-to", "references"};
+    unsigned int hidx;
 
-       show_reply_headers (reply);
+    /* Start array of reply objects */
+    printf ("[");
+
+    for (messages = notmuch_query_search_messages (query);
+        notmuch_messages_valid (messages);
+        notmuch_messages_move_to_next (messages))
+    {
+       message = notmuch_messages_get (messages);
+       reply = create_reply_message (ctx, config, message, reply_all);
+       if (!reply)
+           continue;
+
+       /* Start a reply object */
+       printf ("{ \"reply\": { \"headers\": { ");
+
+       for (hidx = 0; hidx < ARRAY_SIZE (reply_headers); hidx++)
+       {
+           if (hidx)
+               printf (", ");
+
+           printf ("%s: %s", json_quote_str (ctx, reply_headers[hidx]),
+                   json_quote_str (ctx, g_mime_object_get_header (GMIME_OBJECT 
(reply), reply_headers[hidx])));
+       }
 
        g_object_unref (G_OBJECT (reply));
        reply = NULL;
 
-       printf ("On %s, %s wrote:\n",
-               notmuch_message_get_header (message, "date"),
-               notmuch_message_get_header (message, "from"));
+       /* Done the headers for the reply, which has no body parts */
+       printf ("} }");
+
+       /* Start the original */
+       printf (", \"original\": { \"headers\": { ");
+
+       for (hidx = 0; hidx < ARRAY_SIZE (orig_headers); hidx++)
+       {
+           if (hidx)
+               printf (", ");
+
+           printf ("%s: %s", json_quote_str (ctx, orig_headers[hidx]),
+                   json_quote_str (ctx, notmuch_message_get_header (message, 
orig_headers[hidx])));
+       }
+
+       /* End headers */
+       printf (" }, \"body\": [ ");
 
+       /* Show body parts */
        show_message_body (message, format, params);
 
        notmuch_message_destroy (message);
+
+       /* Done the original */
+       printf ("{} ] }");
+
+       /* End the reply object. */
+       printf (" }, ");
     }
+
+    /* End array of reply objects */
+    printf ("{} ]\n");
+
     return 0;
 }
 
@@ -646,6 +833,7 @@ notmuch_reply_format_headers_only(void *ctx,
 
 enum {
     FORMAT_DEFAULT,
+    FORMAT_JSON,
     FORMAT_HEADERS_ONLY,
 };
 
@@ -666,6 +854,7 @@ notmuch_reply_command (void *ctx, int argc, char *argv[])
     notmuch_opt_desc_t options[] = {
        { NOTMUCH_OPT_KEYWORD, &format, "format", 'f',
          (notmuch_keyword_t []){ { "default", FORMAT_DEFAULT },
+                                 { "json", FORMAT_JSON },
                                  { "headers-only", FORMAT_HEADERS_ONLY },
                                  { 0, 0 } } },
        { NOTMUCH_OPT_KEYWORD, &reply_all, "reply-to", 'r',
@@ -684,6 +873,8 @@ notmuch_reply_command (void *ctx, int argc, char *argv[])
 
     if (format == FORMAT_HEADERS_ONLY)
        reply_format_func = notmuch_reply_format_headers_only;
+    else if (format == FORMAT_JSON)
+       reply_format_func = notmuch_reply_format_json;
     else
        reply_format_func = notmuch_reply_format_default;
 
-- 
1.7.5.4

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