move into /app dir and add new db handler + wrappers
This commit is contained in:
Logan Cusano
300
app/internal/db_wrappers.py
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300
app/internal/db_wrappers.py
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import os
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import typing
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import asyncio
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from uuid import uuid4
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from typing import Optional, List, Dict, Any
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from enum import Enum
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from internal.db_handler import MongoHandler
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# Init vars
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DB_NAME = os.getenv("DB_NAME", "default_db")
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MONGO_URL = os.getenv("MONGO_URL", "mongodb://10.10.202.4:27017/")
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SYSTEM_DB_COLLECTION_NAME = "radio_systems"
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# --- Types
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class DemodTypes(str, Enum):
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P25 = "P25"
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DMR = "DMR"
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ANALOG = "NBFM"
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class TalkgroupTag:
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"""Represents a talkgroup tag."""
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def __init__(self, talkgroup: str, tagDec: int):
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self.talkgroup = talkgroup
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self.tagDec = tagDec
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# Add a method to convert to a dictionary, useful for sending as JSON
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def to_dict(self) -> Dict[str, Any]:
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return {"talkgroup": self.talkgroup, "tagDec": self.tagDec}
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class System:
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"""
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A basic data model for a channel/system entry in a radio system.
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"""
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def __init__(self,
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_id: str,
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_type: DemodTypes,
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name: str,
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frequency_khz: List[int],
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location: str,
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avail_on_nodes: List[str],
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description: Optional[str] = "",
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tags: Optional[List[TalkgroupTag]] = None,
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whitelist: Optional[List[int]] = None):
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"""
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Initializes a System object.
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Args:
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_id: A unique identifier for the entry (e.g., MongoDB ObjectId string).
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_type: The demodulation type (P25, NBFM, etc.).
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name: The name of the channel/system.
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frequency_khz: The frequency in kilohertz.
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location: The geographical location or coverage area.
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avail_on_nodes: A list of node identifiers where this is available.
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description: A brief description.
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"""
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self._id: str = _id
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self.type: DemodTypes = _type
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self.name: str = name
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self.frequency_khz: List[int] = frequency_khz
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self.location: str = location
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self.avail_on_nodes: List[str] = avail_on_nodes
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self.description: str = description or ""
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self.tags: List[TalkgroupTag] = tags or None
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self.whitelist: List[int] = whitelist or None
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def __repr__(self) -> str:
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"""
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Provides a developer-friendly string representation of the object.
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"""
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# Use self.type.value for string representation of the enum
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return (f"System(_id='{self._id}', type='{self.type.value}', name='{self.name}', "
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f"frequency_khz={self.frequency_khz}, location='{self.location}', "
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f"avail_on_nodes={self.avail_on_nodes}, description='{self.description}',"
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f" tags='{self.tags}', whitelist='{self.whitelist}')")
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def to_dict(self) -> Dict[str, Any]:
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"""
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Converts the System object to a dictionary suitable for MongoDB.
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Converts the DemodTypes enum to its string value.
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"""
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return {
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"_id": self._id,
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"type": self.type.value, # Store the enum value (string)
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"name": self.name,
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"frequency_khz": self.frequency_khz,
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"location": self.location,
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"avail_on_nodes": self.avail_on_nodes,
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"description": self.description,
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"tags": self.tags,
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"whitelist": self.whitelist,
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}
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@classmethod
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def from_dict(cls, data: Dict[str, Any]) -> "System":
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"""
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Creates a System object from a dictionary (e.g., from MongoDB).
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Converts the 'type' string back to a DemodTypes enum member.
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"""
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# Ensure required keys exist and handle potential type mismatches if necessary
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# Convert the type string back to the DemodTypes enum
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system_type = DemodTypes(data.get("type")) if data.get("type") else None # Handle missing or invalid type
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if system_type is None:
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# Handle error: could raise an exception or return None/default
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# For this example, let's raise an error if type is missing/invalid
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raise ValueError(f"Invalid or missing 'type' in document data: {data}")
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return cls(
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_id=data.get("_id"),
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_type=system_type,
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name=data.get("name", ""), # Provide default empty string if name is missing
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frequency_khz=data.get("frequency_khz", 0), # Provide default 0 if missing
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location=data.get("location", ""),
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avail_on_nodes=data.get("avail_on_nodes", []), # Provide default empty list
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description=data.get("description", ""),
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tags=data.get("tags", None),
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whitelist=data.get("whitelist", None)
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)
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# --- System class ---
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class SystemDbController():
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def __init__(self):
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# Init the handler
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self.db_h = MongoHandler(DB_NAME, SYSTEM_DB_COLLECTION_NAME, MONGO_URL)
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async def create_system(self, system_data: Dict[str, Any]) -> Optional[System]:
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"""
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Creates a new system entry in the database.
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Args:
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system_data: A dictionary containing the data for the new system.
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Returns:
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The created System object if successful, None otherwise.
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"""
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print("\n--- Creating a document ---")
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try:
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# Check if the data to be inserted has an ID
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if not system_data.get("_id"):
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system_data['_id'] = uuid4()
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inserted_result = None
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inserted_id = None
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async with self.db_h as db:
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insert_result = await self.db_h.insert_one(system_data)
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inserted_id = insert_result.inserted_id
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if inserted_id:
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print(f"Insert successful with ID: {inserted_id}")
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# Fetch the inserted document to get the complete data including the generated _id
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query = {"_id": inserted_id}
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inserted_doc = None
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async with self.db_h as db:
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inserted_doc = await db.find_one(query)
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if inserted_doc:
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# Convert the fetched dictionary back to a System object
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return System.from_dict(inserted_doc)
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else:
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print("Insert acknowledged but no ID returned.")
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return None
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except Exception as e:
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print(f"Create failed: {e}")
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return None
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async def find_system(self, query: Dict[str, Any]) -> Optional[System]:
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"""
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Finds a single system entry in the database.
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Args:
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query: A dictionary representing the query criteria.
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Returns:
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A System object if found, None otherwise.
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"""
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print("\n--- Finding one document ---")
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try:
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found_doc = None
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async with self.db_h as db:
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found_doc = await db.find_one(query)
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if found_doc:
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print("Found document (raw dict):", found_doc)
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# Convert the dictionary result to a System object
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return System.from_dict(found_doc)
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else:
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print("Document not found.")
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return None
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except Exception as e:
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print(f"Find failed: {e}")
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return None
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async def find_systems(self, query: Dict[str, Any]) -> Optional[List[System]]:
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"""
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Finds one or more system entries in the database.
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Args:
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query: A dictionary representing the query criteria.
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Returns:
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A list of System object(s) if found, None otherwise.
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"""
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print("\n--- Finding documents ---")
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try:
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found_docs = None
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async with self.db_h as db:
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found_docs = await db.find(query)
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if found_docs:
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print("Found document (raw dict):", found_docs)
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# Convert the dictionary results to a System object
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converted_systems = []
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for doc in found_docs:
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converted_systems.append(System.from_dict(doc))
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print("YURB", found_docs, converted_systems)
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return converted_systems if len(converted_systems) > 0 else None
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else:
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print("Document not found.")
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return None
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except Exception as e:
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print(f"Find failed: {e}")
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return None
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async def find_all_systems(self, query: Dict[str, Any] = {}) -> List[System]:
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"""
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Finds multiple system entries in the database.
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Args:
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query: A dictionary representing the query criteria (default is empty to find all).
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Returns:
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A list of System objects.
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"""
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print("\n--- Finding multiple documents ---")
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try:
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found_docs = None
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async with self.db_h as db:
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found_docs = await db.find(query)
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if found_docs:
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print(f"Found {len(found_docs)} documents (raw dicts).")
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# Convert the list of dictionaries to a list of System objects
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return [System.from_dict(doc) for doc in found_docs]
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else:
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print("No documents found.")
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return []
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except Exception as e:
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print(f"Find all failed: {e}")
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return []
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async def update_system(self, query: Dict[str, Any], update_data: Dict[str, Any]) -> Optional[int]:
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"""
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Updates a single system entry in the database.
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Args:
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query: A dictionary representing the query criteria to find the document.
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update_data: A dictionary representing the update operations (e.g., using $set).
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Returns:
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The number of modified documents if successful, None otherwise.
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"""
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print("\n--- Updating a document ---")
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try:
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update_result = None
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async with self.db_h as db:
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update_result = await db.update_one(query, update_data)
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print(f"Update result: Matched {update_result.matched_count}, Modified {update_result.modified_count}")
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return update_result.modified_count
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except Exception as e:
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print(f"Update failed: {e}")
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return None
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async def delete_system(self, query: Dict[str, Any]) -> Optional[int]:
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"""
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Deletes a single system entry from the database.
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Args:
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query: A dictionary representing the query criteria to find the document to delete.
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Returns:
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The number of deleted documents if successful, None otherwise.
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"""
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print("\n--- Deleting a document ---")
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try:
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delete_result = None
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async with self.db_h as db:
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delete_result = await self.db_h.delete_one(query)
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print(f"Delete result: Deleted count {delete_result.deleted_count}")
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return delete_result.deleted_count
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except Exception as e:
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print(f"Delete failed: {e}")
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return None
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