[polari/wip/fmuellner/tracker: 333/335] lib: Add PolariTplImporter

[Florian Müllner <fmuellner src gnome org>]

commit 959a476dadf70ae8a79e35c98b256fce32d74048
Author: Florian Müllner <fmuellner gnome org>
Date:   Sat Jul 22 20:21:39 2017 +0200

    lib: Add PolariTplImporter
    
    Telepathy-logger uses GMarkup functions to escape markup when writing
    logs,

 src/lib/polari-tpl-importer.c | 373 ++++++++++++++++++++++++++++++++++++++++++
 src/lib/polari-tpl-importer.h |  50 ++++++
 src/meson.build               |   2 +
 3 files changed, 425 insertions(+)
---
diff --git a/src/lib/polari-tpl-importer.c b/src/lib/polari-tpl-importer.c
new file mode 100644
index 0000000..d3bc2d0
--- /dev/null
+++ b/src/lib/polari-tpl-importer.c
@@ -0,0 +1,373 @@
+/* polari-tpl-importer.c
+ *
+ * Copyright (C) 2017 Florian Müllner <fmuellner gnome org>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "polari-tpl-importer.h"
+#include "polari-message-private.h"
+
+#include <string.h>
+#include <stdio.h>
+
+struct _PolariTplImporter
+{
+  GObject parent_instance;
+};
+
+G_DEFINE_TYPE (PolariTplImporter, polari_tpl_importer, G_TYPE_OBJECT)
+
+static void stream_read_content (GInputStream *stream,
+                                 GTask        *task);
+
+PolariTplImporter *
+polari_tpl_importer_new (void)
+{
+  return g_object_new (POLARI_TYPE_TPL_IMPORTER, NULL);
+}
+
+typedef struct {
+  GMarkupParseContext *context;
+  char *content;
+
+  char *account_id;
+  char *channel_name;
+
+  GList *messages;
+  GString *message_text;
+
+  gboolean is_room;
+} ImportData;
+
+static void
+message_list_free (GList *list)
+{
+  g_list_free_full (list, (GDestroyNotify)polari_message_free);
+}
+
+static void
+import_data_free (ImportData *data)
+{
+  g_free (data->content);
+  g_free (data->account_id);
+  g_free (data->channel_name);
+  g_markup_parse_context_free (data->context);
+
+  message_list_free (data->messages);
+  if (data->message_text)
+    g_string_free (data->message_text, TRUE);
+  g_free (data);
+}
+
+static GDateTime *
+parse_time_string (const char *str)
+{
+  int year, month, day, hour, min, sec, n_parsed;
+
+  if (str == NULL)
+    return NULL;
+
+  year = month = day = hour = min = sec = 0;
+  n_parsed = sscanf (str, "%4d%2d%2dT%2d:%2d:%2d",
+                     &year, &month, &day,
+                     &hour, &min, &sec);
+
+  if (n_parsed != 3 && n_parsed != 6)
+    return NULL;
+
+  return g_date_time_new_utc (year, month, day, hour, min, sec);
+}
+
+static void
+tpl_log_start_element_handler (GMarkupParseContext  *context,
+                               const char           *element_name,
+                               const char          **attribute_names,
+                               const char          **attribute_values,
+                               gpointer              user_data,
+                               GError              **error)
+{
+  if (strcmp (element_name, "message") == 0)
+    {
+      GTask *task = user_data;
+      ImportData *data = g_task_get_task_data (task);
+      PolariMessage *message = polari_message_new_empty ();
+      const char *time_str, *type_str;
+
+      data->messages = g_list_prepend (data->messages, message);
+      data->message_text = g_string_new (NULL);
+
+      g_markup_collect_attributes (element_name,
+                                   attribute_names,
+                                   attribute_values,
+                                   error,
+                                   G_MARKUP_COLLECT_STRING,
+                                   "id",
+                                   NULL,
+                                   G_MARKUP_COLLECT_STRING,
+                                   "token",
+                                   NULL,
+                                   G_MARKUP_COLLECT_STRDUP,
+                                   "name",
+                                   &message->sender,
+                                   G_MARKUP_COLLECT_STRING,
+                                   "type",
+                                   &type_str,
+                                   G_MARKUP_COLLECT_STRING,
+                                   "time",
+                                   &time_str,
+                                   G_MARKUP_COLLECT_BOOLEAN,
+                                   "isuser",
+                                   &message->is_self,
+                                   G_MARKUP_COLLECT_INVALID);
+
+      message->time = parse_time_string (time_str);
+      message->is_action = strcmp (type_str, "action") == 0;
+    }
+}
+
+static void
+tpl_log_end_element_handler (GMarkupParseContext  *context,
+                             const char           *element_name,
+                             gpointer              user_data,
+                             GError              **error)
+{
+  if (strcmp (element_name, "message") == 0)
+    {
+      GTask *task = user_data;
+      ImportData *data = g_task_get_task_data (task);
+      PolariMessage *message = data->messages->data;
+
+      g_string_append_c (data->message_text, '\0');
+      message->text = g_string_free (data->message_text, FALSE);
+      data->message_text = NULL;
+    }
+}
+
+static void
+tpl_log_text_handler (GMarkupParseContext  *context,
+                      const char           *text,
+                      gsize                 length,
+                      gpointer              user_data,
+                      GError              **error)
+{
+  GTask *task = user_data;
+  ImportData *data = g_task_get_task_data (task);
+
+  if (data->message_text)
+    g_string_append_len (data->message_text, text, length);
+}
+
+static GMarkupParser tpl_log_parser = {
+  tpl_log_start_element_handler,
+  tpl_log_end_element_handler,
+  tpl_log_text_handler,
+  NULL,
+  NULL
+};
+
+static void
+content_ready (GObject      *source,
+               GAsyncResult *result,
+               gpointer      user_data)
+{
+  GInputStream *stream = G_INPUT_STREAM (source);
+  GTask *task = user_data;
+  ImportData *data = g_task_get_task_data (task);
+  GError *error = NULL;
+  gssize count;
+
+  count = g_input_stream_read_finish (stream, result, &error);
+
+  if (count > 0)
+    {
+      if (!g_markup_parse_context_parse (data->context, data->content, count, &error))
+        count = -1;
+    }
+
+  if (count <= 0)
+    {
+      if (count < 0)
+        g_task_return_error (task, error);
+      else
+        g_task_return_pointer (task,
+                               g_list_reverse (g_steal_pointer (&data->messages)),
+                               (GDestroyNotify)message_list_free);
+      g_object_unref (task);
+
+      g_input_stream_close_async (stream, G_PRIORITY_DEFAULT, NULL, NULL, NULL);
+      g_object_unref (stream);
+    }
+  else
+    {
+      stream_read_content (stream, task);
+    }
+}
+
+#define CONTENT_BLOCK_SIZE 8192
+
+static void
+stream_read_content (GInputStream *stream,
+                     GTask        *task)
+{
+  ImportData *data = g_task_get_task_data (task);
+
+  g_input_stream_read_async (stream,
+                             data->content,
+                             CONTENT_BLOCK_SIZE,
+                             G_PRIORITY_DEFAULT,
+                             g_task_get_cancellable (task),
+                             content_ready,
+                             task);
+}
+
+static void
+get_channel_and_account_info (GFile     *file,
+                              char     **account_id,
+                              char     **channel_name,
+                              gboolean  *is_room)
+{
+  GFile *parent;
+  char *path, *dirname;
+
+  parent = g_file_get_parent (file);
+
+  path = g_file_get_path (parent);
+  dirname = g_path_get_dirname (path);
+  g_free (path);
+
+  *channel_name = g_file_get_basename (parent);
+  *account_id = g_path_get_basename (dirname);
+
+  if (strcmp (*account_id, "chatrooms") == 0)
+    {
+      char *tmp = g_path_get_dirname (dirname);
+      g_free (*account_id);
+
+      *account_id = g_path_get_basename (tmp);
+      g_free (tmp);
+
+      *is_room = TRUE;
+    }
+  else
+    {
+      *is_room = FALSE;
+    }
+
+  g_strdelimit (*account_id, "_", '/');
+
+  g_object_unref (parent);
+  g_free (dirname);
+}
+
+static void
+file_read_ready (GObject      *source,
+                 GAsyncResult *result,
+                 gpointer      user_data)
+{
+  GTask *task = user_data;
+  GFileInputStream *input;
+  GError *error = NULL;
+  ImportData *data;
+
+  input = g_file_read_finish (G_FILE (source), result, &error);
+  g_object_unref (source);
+
+  if (error)
+    {
+      g_task_return_error (task, error);
+      g_object_unref (task);
+      return;
+    }
+
+  data = g_new0 (ImportData, 1);
+  data->context = g_markup_parse_context_new (&tpl_log_parser, 0, task, NULL);
+  data->content = g_malloc0 (CONTENT_BLOCK_SIZE);
+
+  get_channel_and_account_info (G_FILE (source),
+                                &data->account_id, &data->channel_name, &data->is_room);
+
+  g_task_set_task_data (task, data, (GDestroyNotify)import_data_free);
+  stream_read_content (G_INPUT_STREAM (input), task);
+}
+
+void
+polari_tpl_importer_import_async (PolariTplImporter   *self,
+                                  GFile               *file,
+                                  GCancellable        *cancellable,
+                                  GAsyncReadyCallback  callback,
+                                  gpointer             user_data)
+{
+  GTask *task;
+
+  g_return_if_fail (POLARI_IS_TPL_IMPORTER (self));
+
+  task = g_task_new (self, cancellable, callback, user_data);
+  g_task_set_source_tag (task, polari_tpl_importer_import_async);
+
+  g_file_read_async (g_object_ref (file),
+                     G_PRIORITY_DEFAULT,
+                     cancellable,
+                     file_read_ready,
+                     task);
+}
+
+/**
+ * polari_tpl_importer_import_finish:
+ *
+ * Returns: (transfer full) (element-type PolariMessage):
+ */
+GList *
+polari_tpl_importer_import_finish (PolariTplImporter  *self,
+                                   GAsyncResult       *result,
+                                   char              **account_id,
+                                   char              **channel_name,
+                                   gboolean           *is_room,
+                                   GError            **error)
+{
+  ImportData *data;
+
+  g_return_val_if_fail (g_task_is_valid (result, self), NULL);
+
+  data = g_task_get_task_data (G_TASK (result));
+  if (account_id)
+    *account_id = g_strdup (data->account_id);
+  if (channel_name)
+    *channel_name = g_strdup (data->channel_name);
+  if (is_room)
+    *is_room = data->is_room;
+
+  return g_task_propagate_pointer (G_TASK (result), error);
+}
+
+static void
+polari_tpl_importer_finalize (GObject *object)
+{
+  //PolariTplImporter *self = (PolariTplImporter *)object;
+
+  G_OBJECT_CLASS (polari_tpl_importer_parent_class)->finalize (object);
+}
+
+static void
+polari_tpl_importer_class_init (PolariTplImporterClass *klass)
+{
+  GObjectClass *object_class = G_OBJECT_CLASS (klass);
+
+  object_class->finalize = polari_tpl_importer_finalize;
+}
+
+static void
+polari_tpl_importer_init (PolariTplImporter *self)
+{
+}
diff --git a/src/lib/polari-tpl-importer.h b/src/lib/polari-tpl-importer.h
new file mode 100644
index 0000000..3e9e982
--- /dev/null
+++ b/src/lib/polari-tpl-importer.h
@@ -0,0 +1,50 @@
+/* polari-tpl-importer.h
+ *
+ * Copyright (C) 2017 Florian Müllner <fmuellner gnome org>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef POLARI_TPL_IMPORTER_H
+#define POLARI_TPL_IMPORTER_H
+
+#include <gio/gio.h>
+
+G_BEGIN_DECLS
+
+#define POLARI_TYPE_TPL_IMPORTER (polari_tpl_importer_get_type())
+
+G_DECLARE_FINAL_TYPE (PolariTplImporter, polari_tpl_importer, POLARI, TPL_IMPORTER, GObject)
+
+PolariTplImporter *polari_tpl_importer_new (void);
+
+void   polari_tpl_importer_import_async  (PolariTplImporter   *self,
+                                          GFile               *file,
+                                          GCancellable        *cancellable,
+                                          GAsyncReadyCallback  callback,
+                                          gpointer             user_data);
+
+GList *polari_tpl_importer_import_finish (PolariTplImporter  *self,
+                                          GAsyncResult       *result,
+                                          char              **account_id,
+                                          char              **channel_name,
+                                          gboolean           *is_room,
+                                          GError            **error);
+
+#define POLARI_TYPE_TPL_MESSAGE (polari_tpl_message_get_type())
+
+G_END_DECLS
+
+#endif /* POLARI_TPL_IMPORTER_H */
+
diff --git a/src/meson.build b/src/meson.build
index b059a8a..8405ca6 100644
--- a/src/meson.build
+++ b/src/meson.build
@@ -80,6 +80,8 @@ libsources = [
   'lib/polari-message.c',
   'lib/polari-room.c',
   'lib/polari-room.h',
+  'lib/polari-tpl-importer.c',
+  'lib/polari-tpl-importer.h',
   'lib/polari-util.c',
   'lib/polari-util.h'
 ]