class Accessor:
    _DBFILE = "~/sts-api/.db/search.sqlite3"

    def _refresh(self):
        if self.buffers.db == None:
            import sqlite3
            self.buffers.db = sqlite3.connect(self._DBFILE)
        self.buffers.dbcursor = self.buffers.db.cursor()

    def list(self, type="*"):
        self._refresh()
        self.lastOut = self.buffers.dbcursor.execute(
            "SELECT {} FROM index".format(type))
        return self.lastOut

    def search(self, query, limit=None, offset=None):
        self._refresh()
        if self.mode == "ro" or self.mode == "rw":
            import re
            if query != None:
                self.search.query = re.compile(f"^*{query}*$", re.IGNORECASE)
            self.search.limit = limit
            self.search.offset = offset
            if limit == None:
                self.lastOut = re.search(self.search.query, str(self.list()))
                return self.lastOut
            else:
                self.lastOut = re.search(self.search.query, str(self.list()))
                return self.lastOut[:25]

    def addEntry(self, entryData):
        if self.mode == "ro":
            raise ImportError
        self._refresh()
        if entryData.url in self.list("url"):
            raise "EntryExists"
        self.buffers.dbcursor.execute(f"""
          INSERT INTO index VALUES
              ('{entryData.fullURL}', '{entryData.faviconURL}', '{entryData.protocol}', '{entryData.title}', '{entryData.description}')
        """)
        self.buffers.db.commit()
        return True
      
    def __init__(self, mode="ro"):
        self.mode = mode
        self.search = {'query': None, 'limit': 20, 'offset': 0}
        self.lastOut = None
        self.buffers = {
            'db': None,
            'dbcursor': None,
            'read': None,
            'write': None
        }