Reviewed-on: #31

display file name if missing song name metadata

Reviewed-on: #29

HTTP streams defined in playlist files do not contain metadata until
after the stream begins playing.  Therefore, it can be difficult to
distinguish between the streams when nothing is displayed for each entry
in the playlist.  I cannot foresee an instance where the file name is
missing, but this may be failure of my imagination.

Therefore, if the song title is missing, display the file name instead.

This behaviour is consistent with `ncmpcpp` sans special formatting
which `ncmpcpp` does to tracks starting with "http...".

See also: [mpdel/mpdel#2][0]

Signed-off-by: Kenny Ballou <kb@devnulllabs.io>

[0]: https://github.com/mpdel/mpdel/pull/2

Reviewed-on: #28

so it could be used from mdel-playlist library to remove stored playlists using navigel too :)

Reviewed-on: #26

Always use `make-network-process` and related small changes

Add ability to specify the address family for connection profiles.

Signed-off-by: Kenny Ballou <kballou@devnulllabs.io>

Signed-off-by: Kenny Ballou <kballou@devnulllabs.io>

When making a connection to MPD, whether via local UNIX socket, or TCP
stream, `make-network-process` tends to be faster at establishing the
connection.  In my limited testing, `make-network-process` tends to be
dramatically faster than the `open-network-stream` function.  Of course,
without passing `:family 'ipv4` to `make-network-process`, the two
functions exhibit similar performance, so it's not as simple as "one is
written in C and the other is written in ELisp."

Signed-off-by: Kenny Ballou <kballou@devnulllabs.io>

This can be used to switch between IPv4 and IPv6 addresses.

Signed-off-by: Kenny Ballou <kballou@devnulllabs.io>

This will make it possible to parameterize it.

This (somewhat simpler) implemetation of albums listing works for all
backends, including modipy.

looks good, merged!

sorry, missed this one! i'm merging and will rebase my other open PR

Currently, album objects are their own id (there's no method for
libmpdel-entity-id for them), so it's not safe to assume that the id
in libmpdel-playlist-add is always either null or a string.

With this generic, one can implement mpdel-core-open-albums (as an
alterative to open-artists) with a single call to
(mpd-core-open 'albums).

In mopidy, search results always include the item identifier, which
works much more precisely to add them to a playlist via `addid` than
`findall`.

Previous code was not good enough because if the code called
`(libmpdel-ensure-connection)`, a connection would be created even if
the code is wrapped in `(libmpdel-test--with-connection ...)`.