modularize playlist parser

modules/playlist_parser.py

@@ -0,0 +1,56 @@
+import glob
+from . import log95, _log_out, Path
+
+class PlaintextParser:
+    def __init__(self): self.logger = log95.log95("PARSER", output=_log_out)
+
+    def _check_for_imports(self, path: Path, seen=None) -> list[str]:
+        if seen is None: seen = set()
+        if not path.exists():
+            self.logger.error(f"Playlist not found: {path.name}")
+            raise Exception("Playlist doesn't exist")
+        lines = [line.strip() for line in path.read_text().splitlines() if line.strip()]
+
+        out = []
+        for line in lines:
+            if line.startswith("@"):
+                target = Path(line.removeprefix("@"))
+                if target not in seen:
+                    if not target.exists():
+                        self.logger.error(f"Target {target.name} of {path.name} does not exist")
+                        continue
+                    seen.add(target)
+                    out.extend(self._check_for_imports(target, seen))
+            else: out.append(line)
+        return out
+
+    def parse(self, playlist_path: Path) -> tuple[dict[str, str], list[tuple[list[str], dict[str, str]]]]:
+        lines = self._check_for_imports(playlist_path)
+        out = []
+        global_arguments = {}
+        for line in lines:
+            arguments = {}
+            line = line.strip()
+            if not line or line.startswith(";") or line.startswith("#"): continue
+            if "|" in line:
+                if line.startswith("|"): # No file name, we're defining global arguments
+                    args = line.removeprefix("|").split(";")
+                    for arg in args:
+                        if "=" in arg:
+                            key, val = arg.split("=", 1)
+                            arguments[key] = val
+                        else:
+                            arguments[arg] = True
+                else:
+                    line, args = line.split("|", 1)
+                    args = args.split(";")
+                    for arg in args:
+                        if "=" in arg:
+                            key, val = arg.split("=", 1)
+                            arguments[key] = val
+                        else:
+                            arguments[arg] = True
+            out.append(([f for f in glob.glob(line) if Path(f).is_file()], arguments))
+        return global_arguments, out
+
+parser = PlaintextParser()