Merge pull request #64 from cooperhammond/update-to-.35

Update to .35

shard.lock

@@ -1,6 +1,10 @@
-version: 1.0
+version: 2.0
 shards:
-  ydl_binaries:
-    github: cooperhammond/ydl-binaries
-    commit: c82e3937fee20fd076b1c73e24b2d0205e2cf0da
+  json_mapping:
+    git: https://github.com/crystal-lang/json_mapping.cr.git
+    version: 0.1.0
+
+  ydl_binaries:
+    git: https://github.com/cooperhammond/ydl-binaries.git
+    version: 1.1.1+git.commit.c82e3937fee20fd076b1c73e24b2d0205e2cf0da
 

shard.yml

@@ -1,5 +1,5 @@
 name: irs
-version: 1.0.0
+version: 1.0.1
 
 authors:
   - Cooper Hammond <kepoorh@gmail.com>
@@ -13,3 +13,5 @@ license: MIT
 dependencies:
   ydl_binaries:
     github: cooperhammond/ydl-binaries
+  json_mapping:
+    github: crystal-lang/json_mapping.cr

src/glue/album.cr

@@ -9,7 +9,7 @@ class Album < SpotifyList
 
   # Uses the `spotify_searcher` defined in parent `SpotifyList` to find the
   # correct metadata of the list
-  def find_it
+  def find_it : JSON::Any
     album = @spotify_searcher.find_item("album", {
       "name"   => @list_name.as(String),
       "artist" => @list_author.as(String),

src/glue/mapper.cr

@@ -1,4 +1,5 @@
 require "json"
+require "json_mapping"
 
 class PlaylistExtensionMapper
   JSON.mapping(

src/glue/playlist.cr

@@ -13,7 +13,7 @@ class Playlist < SpotifyList
 
   # Uses the `spotify_searcher` defined in parent `SpotifyList` to find the
   # correct metadata of the list
-  def find_it
+  def find_it : JSON::Any
     @playlist = @spotify_searcher.find_item("playlist", {
       "name"     => @list_name.as(String),
       "username" => @list_author.as(String),

src/glue/song.cr

@@ -146,7 +146,8 @@ class Song
       FileUtils.mkdir_p(strpath)
     end
     safe_filename = @filename.gsub(/[\/]/, "").gsub("  ", " ")
-    File.rename("./" + @filename, (path / safe_filename).to_s)
+    FileUtils.cp("./" + @filename, (path / safe_filename).to_s)
+    FileUtils.rm("./" + @filename)
   end
 
   # Provide metadata so that it doesn't have to find it. Useful for overwriting

src/interact/future.cr

@@ -0,0 +1,157 @@
+# copy and pasted from crystal 0.33.1
+# https://github.com/crystal-lang/crystal/blob/18e76172444c7bd07f58bf360bc21981b667668d/src/concurrent/future.cr#L138
+
+
+# :nodoc:
+class Concurrent::Future(R)
+  enum State
+    Idle
+    Delayed
+    Running
+    Completed
+    Canceled
+  end
+
+  @value : R?
+  @error : Exception?
+  @delay : Float64
+
+  def initialize(run_immediately = true, delay = 0.0, &@block : -> R)
+    @state = State::Idle
+    @value = nil
+    @error = nil
+    @channel = Channel(Nil).new
+    @delay = delay.to_f
+    @cancel_msg = nil
+
+    spawn_compute if run_immediately
+  end
+
+  def get
+    wait
+    value_or_raise
+  end
+
+  def success?
+    completed? && !@error
+  end
+
+  def failure?
+    completed? && @error
+  end
+
+  def canceled?
+    @state == State::Canceled
+  end
+
+  def completed?
+    @state == State::Completed
+  end
+
+  def running?
+    @state == State::Running
+  end
+
+  def delayed?
+    @state == State::Delayed
+  end
+
+  def idle?
+    @state == State::Idle
+  end
+
+  def cancel(msg = "Future canceled, you reached the [End of Time]")
+    return if @state >= State::Completed
+    @state = State::Canceled
+    @cancel_msg = msg
+    @channel.close
+    nil
+  end
+
+  private def compute
+    return if @state >= State::Delayed
+    run_compute
+  end
+
+  private def spawn_compute
+    return if @state >= State::Delayed
+
+    @state = @delay > 0 ? State::Delayed : State::Running
+
+    spawn { run_compute }
+  end
+
+  private def run_compute
+    delay = @delay
+
+    if delay > 0
+      sleep delay
+      return if @state >= State::Canceled
+      @state = State::Running
+    end
+
+    begin
+      @value = @block.call
+    rescue ex
+      @error = ex
+    ensure
+      @channel.close
+      @state = State::Completed
+    end
+  end
+
+  private def wait
+    return if @state >= State::Completed
+    compute
+    @channel.receive?
+  end
+
+  private def value_or_raise
+    raise Exception.new(@cancel_msg) if @state == State::Canceled
+
+    value = @value
+    if value.is_a?(R)
+      value
+    elsif error = @error
+      raise error
+    else
+      raise "compiler bug"
+    end
+  end
+end
+
+# Spawns a `Fiber` to compute *&block* in the background after *delay* has elapsed.
+# Access to get is synchronized between fibers.  *&block* is only called once.
+# May be canceled before *&block* is called by calling `cancel`.
+# ```
+# d = delay(1) { Process.kill(Process.pid) }
+# long_operation
+# d.cancel
+# ```
+def delay(delay, &block : -> _)
+  Concurrent::Future.new delay: delay, &block
+end
+
+# Spawns a `Fiber` to compute *&block* in the background.
+# Access to get is synchronized between fibers.  *&block* is only called once.
+# ```
+# f = future { http_request }
+# ... other actions ...
+# f.get #=> String
+# ```
+def future(&exp : -> _)
+  Concurrent::Future.new &exp
+end
+
+# Conditionally spawns a `Fiber` to run *&block* in the background.
+# Access to get is synchronized between fibers.  *&block* is only called once.
+# *&block* doesn't run by default, only when `get` is called.
+# ```
+# l = lazy { expensive_computation }
+# spawn { maybe_use_computation(l) }
+# spawn { maybe_use_computation(l) }
+# ```
+def lazy(&block : -> _)
+  Concurrent::Future.new run_immediately: false, &block
+end
+

src/interact/logger.cr

@@ -1,3 +1,5 @@
+require "./future"
+
 class Logger
   @done_signal = "---DONE---"
 

src/search/youtube.cr

@@ -1,5 +1,7 @@
 require "http"
 require "xml"
+require "json"
+
 
 module Youtube
   extend self
@@ -19,6 +21,8 @@ module Youtube
     "official video", "official music video",
   ]
 
+  alias NODES_CLASS = Array(Hash(String, String))
+
   # Finds a youtube url based off of the given information.
   # The query to youtube is constructed like this:
   #   "<song_name> <artist_name> <search terms>"
@@ -63,7 +67,7 @@ module Youtube
   #   ...
   # ]
   private def rank_videos(song_name : String, artist_name : String,
-                          query : String, nodes : Array(XML::Node)) : Array(Hash(String, Int32))
+                          query : String, nodes : Array(Hash(String, String))) : Array(Hash(String, Int32))
     points = [] of Hash(String, Int32)
     index = 0
 
@@ -149,32 +153,45 @@ module Youtube
 
   # Finds valid video links from a `HTTP::Client.get` request
   # Returns an `Array` of `XML::Node`
-  private def get_video_link_nodes(doc : String) : Array(XML::Node)
-    nodes = XML.parse(doc).xpath_nodes("//a")
-    valid_nodes = [] of XML::Node
+  private def get_video_link_nodes(response_body : String) : NODES_CLASS
+    yt_initial_data : JSON::Any = JSON.parse("{}")
 
-    nodes.each do |node|
-      if video_link_node?(node)
-        valid_nodes.push(node)
+    response_body.each_line do |line|
+      if line.includes?("window[\"ytInitialData\"]")
+        yt_initial_data = JSON.parse(line.split(" = ")[1][0..-2])
       end
     end
 
-    return valid_nodes
+    if yt_initial_data == JSON.parse("{}")
+      puts "Youtube has changed the way it organizes its webpage, submit a bug"
+      puts "on https://github.com/cooperhammond/irs"
+      exit(1)
     end
 
-  # Tests if the provided `XML::Node` has a valid link to a video
-  # Returns a `Bool`
-  private def video_link_node?(node : XML::Node) : Bool
-    # If this passes, then the node links to a playlist, not a video
-    if node["href"]?
-      return false if node["href"].includes?("&list=")
+    # where the vid metadata lives
+    yt_initial_data = yt_initial_data["contents"]["twoColumnSearchResultsRenderer"]["primaryContents"]["sectionListRenderer"]["contents"]
+
+    video_metadata = [] of Hash(String, String)
+
+    i = 0
+    while true
+      begin
+        # video title
+        raw_metadata = yt_initial_data[0]["itemSectionRenderer"]["contents"][i]["videoRenderer"]
+
+        metadata = {} of String => String
+
+        metadata["title"] = raw_metadata["title"]["runs"][0]["text"].as_s
+        metadata["href"] = raw_metadata["navigationEndpoint"]["commandMetadata"]["webCommandMetadata"]["url"].as_s
+    
+        video_metadata.push(metadata)
+      rescue IndexError
+        break
+      rescue Exception
+      end
+      i += 1
     end
 
-    VALID_LINK_CLASSES.each do |valid_class|
-      if node["class"]?
-        return true if node["class"].includes?(valid_class)
-      end
-    end
-    return false
+    return video_metadata
   end
 end