rework tool to work with the sqlite database

tlfi/__main__.py

@@ -7,12 +7,13 @@ formatting almost like in the TLFi.
 
 import argparse
 import difflib
-import gzip
+import lzma
+import os
 import re
-import unicodedata
-from functools import cache
-from os import environ
+import sqlite3
+import sys
 from pathlib import Path
+from typing import Generator
 
 from bs4 import BeautifulSoup, NavigableString
 
@@ -25,80 +26,53 @@ except ImportError:
             return ""
     t = DummyTerminal()
 
+TAG_STRIP_RE = re.compile(r"\s+")
+
 
 def main():
     ap = argparse.ArgumentParser(description="TLFi CLI")
     ap.add_argument("query", help="mot(s) à chercher")
-    ap.add_argument("-f", "--lexical-forms",
-                    default=get_root_path() / "lexical_forms.txt",
-                    help="fichier des formes lexicales")
-    ap.add_argument("-d", "--definitions",
-                    default=get_root_path() / "definitions",
-                    help="répertoire des définitions")
+    ap.add_argument("-d", "--database", help="base de données")
     args = ap.parse_args()
 
-    lookup_res = lookup(args.query, args.lexical_forms)
-    if lookup_res is None:
-        exit()
-
-    if (defs := get_definition_paths(lookup_res, args.definitions)):
-        for d in defs:
-            show_definition(d)
-
-
-@cache
-def get_root_path():
-    return Path(environ.get("TLFI_ROOT", "."))
-
+    if args.database:
+        db_path = Path(args.database)
+    elif (env_db_path := os.environ.get("TLFI_DATABASE")):
+        db_path = Path(env_db_path)
+    else:
+        sys.exit("Pas de base de données et TLFI_DATABASE n'est pas défini.")
+
+    lexical_form = args.query
+    connection = sqlite3.connect(db_path)
+    printed = 0
+    for definition_html in get_definitions(lexical_form, connection):
+        pretty_print_definition(definition_html)
+        printed += 1
+    if printed == 0:
+        print("Forme lexicale non trouvée. Suggestions :")
+        for suggestion in get_suggestions(lexical_form, connection):
+            print(f"* {suggestion}")
+
+
+def get_definitions(
+    lexical_form: str,
+    connection: sqlite3.Connection
+) -> Generator[str, None, None]:
+    cursor = connection.cursor()
+    result = cursor.execute(
+        "SELECT definition FROM definitions WHERE lexical_form = ?",
+        (lexical_form,)
+    )
+    for (blob,) in result.fetchall():
+        yield lzma.decompress(blob).decode()
 
-def lookup(query, lexical_forms_path):
-    """Return a form for which a definition might exist, else None.
 
-    If we are sure the lexical form does not have definitions, suggest similar
-    words to the user.
-    """
-    with open(lexical_forms_path, "rt") as lexical_forms_file:
-        forms = lexical_forms_file.readlines()
-    if query + "\n" in forms:
-        return query
-
-    print("Suggestions :")
-    suggestions = (
-        form for form in map(str.rstrip, forms)
-        if difflib.SequenceMatcher(None, query, form).ratio() > 0.8
-    )
-    for form in suggestions:
-        print(f"- {form}")
-    return None
-
-
-def get_definition_paths(query, definitions) -> list:
-    """Return a list of definition file paths for this lexical form."""
-    nfkd = unicodedata.normalize("NFKD", query[0])
-    first_char = next((c for c in nfkd if not unicodedata.combining(c)), "")
-    if not first_char:
-        print("Pas compris la première lettre…")
-        return []
-    path = Path(definitions) / first_char.upper() / query
-    try:
-        return [f for f in path.iterdir() if str(f).endswith(".txt.gz")]
-    except FileNotFoundError:
-        print("Définition non trouvée.")
-        return []
-
-
-def show_definition(def_path):
-    """Print a definition from a definition file."""
-    with gzip.open(def_path, "rt") as def_file:
-        html = def_file.read()
+def pretty_print_definition(html: str):
     soup = BeautifulSoup(html, "html.parser")
     content = parse_tag(soup.div.div)
     print(content)
 
 
-TAG_STRIP_RE = re.compile(r"\s+")
-
-
 def parse_tag(tag) -> str:
     if isinstance(tag, NavigableString):
         return TAG_STRIP_RE.sub(" ", tag)
@@ -124,5 +98,24 @@ def parse_tag(tag) -> str:
     return content
 
 
+def get_suggestions(
+    query: str,
+    connection: sqlite3.Connection
+) -> Generator[str, None, None]:
+    """Return a form for which a definition might exist, else None.
+
+    If we are sure the lexical form does not have definitions, suggest similar
+    words to the user.
+    """
+    cursor = connection.cursor()
+    result = cursor.execute("SELECT lexical_form FROM definitions")
+    yielded = []
+    for (form,) in result.fetchall():
+        if difflib.SequenceMatcher(None, query, form).ratio() > 0.8:
+            if form not in yielded:
+                yield form
+                yielded.append(form)
+
+
 if __name__ == "__main__":
     main()