[WIP2 08/12] cli/show: add lastmod to structured output

[David Bremner]

Here again we restrict a few tests to version 2, to keep them passing.
---
 devel/schemata         |  2 ++
 lib/message.cc         | 20 ++++++++++++++++++++
 lib/notmuch.h          |  8 ++++++++
 notmuch-show.c         |  7 +++++++
 test/T190-multipart.sh |  6 +++---
 test/T220-reply.sh     |  2 +-
 6 files changed, 41 insertions(+), 4 deletions(-)

diff --git a/devel/schemata b/devel/schemata
index 76dad01..02f7cc0 100644
--- a/devel/schemata
+++ b/devel/schemata
@@ -71,6 +71,8 @@ message = {
     match:          bool,
     filename:	    string,
     timestamp:      unix_time, # date header as unix time
+    lastmod:	    int,       # database revision when message
+			       # was update
     date_relative:  string,   # user-friendly timestamp
     tags:           [string*],
 
diff --git a/lib/message.cc b/lib/message.cc
index 26b5e76..9d04438 100644
--- a/lib/message.cc
+++ b/lib/message.cc
@@ -939,6 +939,26 @@ notmuch_message_get_date (notmuch_message_t *message)
     return Xapian::sortable_unserialise (value);
 }
 
+time_t
+notmuch_message_get_last_mod (notmuch_message_t *message)
+{
+    std::string value;
+
+    try {
+	value = message->doc.get_value (NOTMUCH_VALUE_LAST_MOD);
+    } catch (Xapian::Error &error) {
+	_notmuch_database_log(_notmuch_message_database (message), "A Xapian exception occurred when reading last modification: %s\n",
+		 error.get_msg().c_str());
+	message->notmuch->exception_reported = TRUE;
+	return 0;
+    }
+
+    if (value.empty ())
+	/* sortable_unserialise is undefined on empty string */
+	return -1;
+    return Xapian::sortable_unserialise (value);
+}
+
 notmuch_tags_t *
 notmuch_message_get_tags (notmuch_message_t *message)
 {
diff --git a/lib/notmuch.h b/lib/notmuch.h
index 5c17d97..b4897ab 100644
--- a/lib/notmuch.h
+++ b/lib/notmuch.h
@@ -1324,6 +1324,14 @@ time_t
 notmuch_message_get_date  (notmuch_message_t *message);
 
 /**
+ * Get the last database modifaction revision of 'message' as an
+ * integer.
+ *
+ */
+long int
+notmuch_message_get_last_mod  (notmuch_message_t *message);
+
+/**
  * Get the value of the specified header from 'message' as a UTF-8 string.
  *
  * Common headers are stored in the database when the message is
diff --git a/notmuch-show.c b/notmuch-show.c
index 4489ea5..3917b82 100644
--- a/notmuch-show.c
+++ b/notmuch-show.c
@@ -121,6 +121,7 @@ format_message_sprinter (sprinter_t *sp, notmuch_message_t *message)
     void *local = talloc_new (NULL);
     notmuch_tags_t *tags;
     time_t date;
+    long int revision;
     const char *relative_date;
 
     sp->map_key (sp, "id");
@@ -139,6 +140,12 @@ format_message_sprinter (sprinter_t *sp, notmuch_message_t *message)
     date = notmuch_message_get_date (message);
     sp->integer (sp, date);
 
+    if (notmuch_format_version >= 3) {
+	sp->map_key (sp, "lastmod");
+	revision = notmuch_message_get_last_mod (message);
+	sp->integer (sp, revision);
+    }
+
     sp->map_key (sp, "date_relative");
     relative_date = notmuch_time_relative_date (local, date);
     sp->string (sp, relative_date);
diff --git a/test/T190-multipart.sh b/test/T190-multipart.sh
index f8b805f..a6b4fca 100755
--- a/test/T190-multipart.sh
+++ b/test/T190-multipart.sh
@@ -343,7 +343,7 @@ test_expect_success \
     "notmuch show --format=text --part=8 'id:87liy5ap00.fsf at yoom.home.cworth.org'"
 
 test_begin_subtest "--format=json --part=0, full message"
-notmuch show --format=json --part=0 'id:87liy5ap00.fsf at yoom.home.cworth.org' >OUTPUT
+notmuch show --format=json --format-version=2 --part=0 'id:87liy5ap00.fsf at yoom.home.cworth.org' >OUTPUT
 cat <<EOF >EXPECTED
 {"id": "87liy5ap00.fsf at yoom.home.cworth.org", "match": true, "excluded": false, "filename": "${MAIL_DIR}/multipart", "timestamp": 978709437, "date_relative": "2001-01-05", "tags": ["attachment","inbox","signed","unread"], "headers": {"Subject": "Multipart message", "From": "Carl Worth <cworth at cworth.org>", "To": "cworth at cworth.org", "Date": "Fri, 05 Jan 2001 15:43:57 +0000"}, "body": [
 {"id": 1, "content-type": "multipart/signed", "content": [
@@ -449,7 +449,7 @@ notmuch show --format=raw 'id:87liy5ap00.fsf at yoom.home.cworth.org' >OUTPUT
 test_expect_equal_file OUTPUT "${MAIL_DIR}"/multipart
 
 test_begin_subtest "--format=raw --part=0, full message"
-notmuch show --format=raw --part=0 'id:87liy5ap00.fsf at yoom.home.cworth.org' >OUTPUT
+NOTMUCH_SHOW --format=raw --part=0 'id:87liy5ap00.fsf at yoom.home.cworth.org' >OUTPUT
 test_expect_equal_file OUTPUT "${MAIL_DIR}"/multipart
 
 test_begin_subtest "--format=raw --part=1, message body"
@@ -617,7 +617,7 @@ EOF
 test_expect_equal_file OUTPUT EXPECTED
 
 test_begin_subtest "'notmuch reply' to a multipart message with json format"
-notmuch reply --format=json 'id:87liy5ap00.fsf at yoom.home.cworth.org' | notmuch_json_show_sanitize >OUTPUT
+notmuch reply --format=json --format-version=2 'id:87liy5ap00.fsf at yoom.home.cworth.org' | notmuch_json_show_sanitize >OUTPUT
 notmuch_json_show_sanitize <<EOF >EXPECTED
 {"reply-headers": {"Subject": "Re: Multipart message",
  "From": "Notmuch Test Suite <test_suite at notmuchmail.org>",
diff --git a/test/T220-reply.sh b/test/T220-reply.sh
index b0d854a..e72f2e4 100755
--- a/test/T220-reply.sh
+++ b/test/T220-reply.sh
@@ -216,7 +216,7 @@ On Tue, 05 Jan 2010 15:43:56 -0000, ☃ <snowman at example.com> wrote:
 > Encoding"
 
 test_begin_subtest "Reply with RFC 2047-encoded headers (JSON)"
-output=$(notmuch reply --format=json id:${gen_msg_id})
+output=$(notmuch reply --format=json --format-version=2 id:${gen_msg_id})
 test_expect_equal_json "$output" '
 {
     "original": {
-- 
2.1.4