models.py

import json
import logging
from typing import Optional

import peewee as pw
from peewee import *

from playhouse.shortcuts import model_to_dict
from pydantic import BaseModel, ConfigDict

from apps.web.internal.db import DB, JSONField

from typing import List, Union, Optional
from config import SRC_LOG_LEVELS

import time

log = logging.getLogger(__name__)
log.setLevel(SRC_LOG_LEVELS["MODELS"])


####################
# Models DB Schema
####################


# ModelParams is a model for the data stored in the params field of the Model table
class ModelParams(BaseModel):
    model_config = ConfigDict(extra="allow")
    pass


# ModelMeta is a model for the data stored in the meta field of the Model table
# It isn't currently used in the backend, but it's here as a reference
class ModelMeta(BaseModel):
    description: Optional[str] = None
    """
        User-facing description of the model.
    """

    vision_capable: Optional[bool] = None
    """
        A flag indicating if the model is capable of vision and thus image inputs
    """

    model_config = ConfigDict(extra="allow")

    pass


class Model(pw.Model):
    id = pw.TextField(unique=True)
    """
        The model's id as used in the API. If set to an existing model, it will override the model.
    """
    user_id = pw.TextField()

    base_model_id = pw.TextField(null=True)
    """
        An optional pointer to the actual model that should be used when proxying requests.
    """

    name = pw.TextField()
    """
        The human-readable display name of the model.
    """

    params = JSONField()
    """
        Holds a JSON encoded blob of parameters, see `ModelParams`.
    """

    meta = JSONField()
    """
        Holds a JSON encoded blob of metadata, see `ModelMeta`.
    """

    updated_at = BigIntegerField()
    created_at = BigIntegerField()

    class Meta:
        database = DB


class ModelModel(BaseModel):
    id: str
    base_model_id: Optional[str] = None

    name: str
    params: ModelParams
    meta: ModelMeta

    updated_at: int  # timestamp in epoch
    created_at: int  # timestamp in epoch


####################
# Forms
####################


class ModelResponse(BaseModel):
    id: str
    name: str
    meta: ModelMeta
    updated_at: int  # timestamp in epoch
    created_at: int  # timestamp in epoch


class ModelForm(BaseModel):
    id: str
    base_model_id: Optional[str] = None
    name: str
    meta: ModelMeta
    params: ModelParams


class ModelsTable:
    def __init__(
        self,
        db: pw.SqliteDatabase | pw.PostgresqlDatabase,
    ):
        self.db = db
        self.db.create_tables([Model])

    def insert_new_model(self, model: ModelForm, user_id: str) -> Optional[ModelModel]:
        try:
            model = Model.create(
                **{
                    **model.model_dump(),
                    "user_id": user_id,
                    "created_at": int(time.time()),
                    "updated_at": int(time.time()),
                }
            )
            return ModelModel(**model_to_dict(model))
        except:
            return None

    def get_all_models(self) -> List[ModelModel]:
        return [ModelModel(**model_to_dict(model)) for model in Model.select()]

    def get_model_by_id(self, id: str) -> Optional[ModelModel]:
        try:
            model = Model.get(Model.id == id)
            return ModelModel(**model_to_dict(model))
        except:
            return None

    def update_model_by_id(self, id: str, model: ModelForm) -> Optional[ModelModel]:
        try:
            # update only the fields that are present in the model
            query = Model.update(**model.model_dump()).where(Model.id == id)
            query.execute()

            model = Model.get(Model.id == id)
            return ModelModel(**model_to_dict(model))
        except:
            return None

    def delete_model_by_id(self, id: str) -> bool:
        try:
            query = Model.delete().where(Model.id == id)
            query.execute()
            return True
        except:
            return False


Models = ModelsTable(DB)