added 'glossary' command

chatmastermind/commands/glossary.py

@@ -0,0 +1,93 @@
+import sys
+import argparse
+from pathlib import Path
+from pydoc import pager
+from ..configuration import Config
+from ..glossary import Glossary
+
+
+class GlossaryCmdError(Exception):
+    pass
+
+
+def print_paged(text: str) -> None:
+    pager(text)
+
+
+def get_glossary_file_path(name: str, config: Config) -> Path:
+    """
+    Get the complete filename for a glossary with the given path.
+    """
+    if not config.glossaries:
+        raise GlossaryCmdError("Can't create glossary name without a glossary directory")
+    return Path(config.glossaries, name).with_suffix(Glossary.file_suffix).absolute()
+
+
+def list_glossaries(args: argparse.Namespace, config: Config) -> None:
+    """
+    List existing glossaries in the 'glossaries' directory.
+    """
+    if not config.glossaries:
+        raise GlossaryCmdError("Glossaries directory missing in the configuration file")
+    glossaries = Path(config.glossaries).glob(f'*.{Glossary.file_suffix}')
+    for glo in glossaries:
+        print(Glossary.from_file(glo).to_str())
+
+
+def print_glossary(args: argparse.Namespace, config: Config) -> None:
+    """
+    Print an existing glossary.
+    """
+    # sanity checks
+    if args.name is None:
+        raise GlossaryCmdError("Missing glossary name")
+    if config.glossaries is None and args.file is None:
+        raise GlossaryCmdError("Glossaries directory missing in the configuration file")
+    # create file path or use the given one
+    glo_file = Path(args.file) if args.file else get_glossary_file_path(args.name, config)
+    if not glo_file.exists():
+        raise GlossaryCmdError(f"Glossary '{glo_file}' does not exist")
+    # read glossary
+    glo = Glossary.from_file(glo_file)
+    print_paged(glo.to_str(with_entries=True))
+
+
+def create_glossary(args: argparse.Namespace, config: Config) -> None:
+    """
+    Create a new glossary and write it either to the glossaries directory
+    or the given file.
+    """
+    # sanity checks
+    if args.name is None:
+        raise GlossaryCmdError("Missing glossary name")
+    if args.source_lang is None:
+        raise GlossaryCmdError("Missing source language")
+    if args.target_lang is None:
+        raise GlossaryCmdError("Missing target language")
+    if config.glossaries is None and args.file is None:
+        raise GlossaryCmdError("Glossaries directory missing in the configuration file")
+    # create file path or use the given one
+    glo_file = Path(args.file) if args.file else get_glossary_file_path(args.name, config)
+    if glo_file.exists():
+        raise GlossaryCmdError(f"Glossary '{glo_file}' already exists")
+    glo = Glossary(name=args.name,
+                   source_lang=args.source_lang,
+                   target_lang=args.target_lang,
+                   desc=args.description,
+                   file_path=glo_file)
+    glo.to_file()
+    print(f"Successfully created new glossary '{glo_file}'.")
+
+
+def glossary_cmd(args: argparse.Namespace, config: Config) -> None:
+    """
+    Handler for the 'glossary' command.
+    """
+    try:
+        if args.create:
+            create_glossary(args, config)
+        elif args.list:
+            list_glossaries(args, config)
+    except GlossaryCmdError as err:
+        print(f"Error: {err}")
+        sys.exit(1)