From f99ae299f535d56bcca9ee671a69659772221574 Mon Sep 17 00:00:00 2001
From: Kovid Goyal <kovid@kovidgoyal.net>
Date: Tue, 2 May 2017 13:59:32 +0530
Subject: [PATCH] Port calibredb embed_metadata

---
 src/calibre/db/cli/cmd_embed_metadata.py | 49 +++++++++++++++++++++---
 src/calibre/db/cli/main.py               |  4 +-
 2 files changed, 46 insertions(+), 7 deletions(-)

diff --git a/src/calibre/db/cli/cmd_embed_metadata.py b/src/calibre/db/cli/cmd_embed_metadata.py
index 2f6f22ae56..37b20c97e0 100644
--- a/src/calibre/db/cli/cmd_embed_metadata.py
+++ b/src/calibre/db/cli/cmd_embed_metadata.py
@@ -4,19 +4,58 @@
 
 from __future__ import absolute_import, division, print_function, unicode_literals
 
+from calibre import prints
+from calibre.db.cli import integers_from_string
+from calibre.srv.changes import formats_added
+
 readonly = False
 version = 0  # change this if you change signature of implementation()
 
 
-def implementation(db, notify_changes, *args):
-    is_remote = notify_changes is not None
-    is_remote
+def implementation(db, notify_changes, book_id, only_fmts):
+    if book_id is None:
+        return db.all_book_ids()
+    with db.write_lock:
+        if db.has_id(book_id):
+            db.embed_metadata((book_id,), only_fmts=only_fmts)
+            formats_added({book_id: db.formats(book_id)})
+            return db.field_for('title', book_id)
 
 
 def option_parser(get_parser, args):
-    pass
+    parser = get_parser(_(
+'''
+%prog embed_metadata [options] book_id
+
+Update the metadata in the actual book files stored in the calibre library from
+the metadata in the calibre database.  Normally, metadata is updated only when
+exporting files from calibre, this command is useful if you want the files to
+be updated in place. Note that different file formats support different amounts
+of metadata. You can use the special value 'all' for book_id to update metadata
+in all books. You can also specify many book ids separated by spaces and id ranges
+separated by hyphens. For example: %prog embed_metadata 1 2 10-15 23'''))
+    parser.add_option('-f', '--only-formats', action='append', default=[], help=_(
+        'Only update metadata in files of the specified format. Specify it multiple'
+        ' times for multiple formats. By default, all formats are updated.'))
+    return parser
 
 
 def main(opts, args, dbctx):
-    raise NotImplementedError('TODO: implement this')
+    ids = set()
+    for arg in args:
+        if arg == 'all':
+            ids = None
+            break
+        ids |= set(integers_from_string(arg))
+    only_fmts = opts.only_formats or None
+    if ids is None:
+        ids = dbctx.run('embed_metadata', None, None)
+
+    def progress(i, title):
+        prints(_('Processed {0} ({1} of {2})').format(title, i, len(ids)))
+
+    for i, book_id in enumerate(ids):
+        title = dbctx.run('embed_metadata', book_id, only_fmts)
+        progress(i+1, title or _('No book with id: {}').format(book_id))
+
     return 0
diff --git a/src/calibre/db/cli/main.py b/src/calibre/db/cli/main.py
index 75bc727f59..40b368cdc4 100644
--- a/src/calibre/db/cli/main.py
+++ b/src/calibre/db/cli/main.py
@@ -22,8 +22,8 @@ COMMANDS = (
     'list', 'add', 'remove', 'add_format', 'remove_format', 'show_metadata',
     'set_metadata', 'export', 'catalog', 'saved_searches', 'add_custom_column',
     'custom_columns', 'remove_custom_column', 'set_custom', 'restore_database',
-    'check_library', 'list_categories', 'backup_metadata', 'clone',
-    # 'embed_metadata', 'search'
+    'check_library', 'list_categories', 'backup_metadata', 'clone', 'embed_metadata',
+    # 'search'
 )