feat: hivemind-plugin-manager (#7)

* feat: hivemind-plugin-manager

integrate with hivemind-plugin-manager

provide a json database implementation via entrypoint

* Update json_database/hpm.py

Co-authored-by: coderabbitai[bot] <136622811+coderabbitai[bot]@users.noreply.github.com>

---------

Co-authored-by: coderabbitai[bot] <136622811+coderabbitai[bot]@users.noreply.github.com>

json_database/hpm.py

@@ -0,0 +1,86 @@
+from hivemind_plugin_manager.database import Client, AbstractDB, cast2client
+from ovos_utils.log import LOG
+from ovos_utils.xdg_utils import xdg_data_home
+from typing import Union, Iterable, List
+from json_database import JsonStorageXDG
+
+
+class JsonDB(AbstractDB):
+    """HiveMind Database implementation using JSON files."""
+
+    def __init__(self, name="clients", subfolder="hivemind-core"):
+        self._db = JsonStorageXDG(name, subfolder=subfolder, xdg_folder=xdg_data_home())
+        LOG.debug(f"json database path: {self._db.path}")
+
+    def sync(self):
+        """update db from disk if needed"""
+        self._db.reload()
+
+    def add_item(self, client: Client) -> bool:
+        """
+        Add a client to the JSON database.
+
+        Args:
+            client: The client to be added.
+
+        Returns:
+            True if the addition was successful, False otherwise.
+        """
+        self._db[client.client_id] = client.__dict__
+        return True
+
+    def search_by_value(self, key: str, val: Union[str, bool, int, float]) -> List[Client]:
+        """
+        Search for clients by a specific key-value pair in the JSON database.
+
+        Args:
+            key: The key to search by.
+            val: The value to search for.
+
+        Returns:
+            A list of clients that match the search criteria.
+        """
+        res = []
+        if key == "client_id":
+            v = self._db.get(val)
+            if v:
+                res.append(cast2client(v))
+        else:
+            for client in self._db.values():
+                v = client.get(key)
+                if v == val:
+                    res.append(cast2client(client))
+        return res
+
+    def __len__(self) -> int:
+        """
+        Get the number of clients in the database.
+
+        Returns:
+            The number of clients in the database.
+        """
+        return len(self._db)
+
+    def __iter__(self) -> Iterable['Client']:
+        """
+        Iterate over all clients in the JSON database.
+
+        Returns:
+            An iterator over the clients in the database.
+        """
+        for item in self._db.values():
+            yield Client.deserialize(item)
+
+    def commit(self) -> bool:
+        """
+        Commit changes to the JSON database.
+
+        Returns:
+            True if the commit was successful, False otherwise.
+        """
+        try:
+            self._db.store()
+            return True
+        except Exception as e:
+            LOG.error(f"Failed to save {self._db.path} - {e}")
+            return False