LibreTranslate/app/api_keys.py

import sqlite3
import uuid
from expiringdict import ExpiringDict

DEFAULT_DB_PATH = "api_keys.db"

class Database:
    def __init__(self, db_path = DEFAULT_DB_PATH, max_cache_len=1000, max_cache_age=30):
        self.db_path = db_path
        self.cache = ExpiringDict(max_len=max_cache_len, max_age_seconds=max_cache_age)

        # Make sure to do data synchronization on writes!
        self.c = sqlite3.connect(db_path, check_same_thread=False)
        self.c.execute('''CREATE TABLE IF NOT EXISTS api_keys (
            "api_key"	TEXT NOT NULL,
            "req_limit"	INTEGER NOT NULL,
            PRIMARY KEY("api_key")
        );''')

    def lookup(self, api_key):
        req_limit = self.cache.get(api_key)
        if req_limit is None:
            # DB Lookup
            stmt = self.c.execute('SELECT req_limit FROM api_keys WHERE api_key = ?', (api_key, ))
            row = stmt.fetchone()
            if row is not None:
                self.cache[api_key] = row[0]
                req_limit = row[0]
            else:
                self.cache[api_key] = False
                req_limit = False
        
        if isinstance(req_limit, bool):
            req_limit = None
        
        return req_limit
    
    def add(self, req_limit, api_key = "auto"):
        if api_key == "auto":
            api_key = str(uuid.uuid4())

        self.remove(api_key)
        self.c.execute("INSERT INTO api_keys (api_key, req_limit) VALUES (?, ?)", (api_key, req_limit))
        self.c.commit()
        return (api_key, req_limit)
    
    def remove(self, api_key):
        self.c.execute('DELETE FROM api_keys WHERE api_key = ?', (api_key, ))
        self.c.commit()
        return api_key

    def all(self):
        row = self.c.execute("SELECT api_key, req_limit FROM api_keys")
        return row.fetchall()