Test: Detection of track type

tests/test_eval_track_type.liq

+#!/usr/bin/env liquidsoap
+#
+# Aura Engine (https://gitlab.servus.at/aura/engine)
+#
+# Copyright (C) 2017-now() - The Aura Engine Team.
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Affero 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 Affero General Public License for more details.
+#
+# You should have received a copy of the GNU Affero General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+
+%include "base_config.liq"
+
+# Init defaults
+engine_default_track_type = "0"
+engine_current_track_type = ref("-1")
+
+
+# Evaluates the track type based on the given:
+#   a.) "meta.track_type" passed as annotation, and if not available on
+#   b.) "engine_current_track_type" passed via server function
+#   c.) "meta.source" and if not available on
+#   d.) configured default track type setting
+#
+# Returns:
+#   0=QUEUE/FILE, 1=STREAM, 2=LIVE ANALOG, 3=PLAYLIST
+#
+def eval_track_type(meta_track_type, meta_source) =
+    # let source = meta["source"]
+    type_mapping = [
+        ("fallback_folder", "0"),
+        ("fallback_playlist", "3"),
+        ("in_filesystem_0", "0"),
+        ("in_filesystem_0", "0"),
+        ("in_http_0", "1"),
+        ("in_http_1", "1"),
+        ("linein_0", "2"),
+        ("linein_1", "2"),
+        ("linein_2", "2"),
+        ("linein_3", "2"),
+        ("linein_4", "2")
+    ]
+
+    if meta_track_type != "" then
+        engine_current_track_type := meta_track_type
+    else
+        if !engine_current_track_type == "" then
+            let source_type = list.assoc(
+                default=engine_default_track_type,
+                meta_source,
+                type_mapping
+                )
+            engine_current_track_type := source_type
+        end
+    end
+    !engine_current_track_type
+end
+
+
+# Case 1: Passed meta track type => 33
+engine_current_track_type := "55"
+type = eval_track_type("33", "fallback_playlist")
+print("Got Type: #{type}")
+
+# Case 2: Passed track type via server function => 55
+engine_current_track_type := "55"
+type = eval_track_type("", "fallback_playlist")
+print("Got Type: #{type}")
+
+# Case 3: Detect track type via source => 3
+engine_current_track_type := ""
+type = eval_track_type("", "fallback_playlist")
+print("Got Type: #{type}")
+
+# Case 4: Default track type => 0
+engine_current_track_type := ""
+type = eval_track_type("", "fallback_playlistx")
+print("Got Type: #{type}")
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