(20241212) Reorganizing code to perform core actions in one place.
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"""
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AUTHOR:
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Khushal P Soonderji
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DATE:
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Saturday, 7th Dec., 2024.
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OBJECTIVE:
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To define how payment transactions will be stored in the database.
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REFERENCES:
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N/A
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DOWNLOADS:
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N/A
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"""
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# *****************************************************************************************************************
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# ***** ****
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# *** IMPORT ***
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# ***** ****
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# *****************************************************************************************************************
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# To make sibling directories accessible for imports:
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import sys
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sys.path.append(".")
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sys.path.append("..")
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# For making data behaviour_models:
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from pydantic import BaseModel, Field, field_validator, PastDatetime, AwareDatetime
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from typing import Optional, Literal, Union, List, Any
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# My utils:
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from utils_v2.string import regex
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from utils_v2.date_time import date_time
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# To work with MongoDB:
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from bson.objectid import ObjectId
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# To work with date and time:
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import datetime
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# To work with currencies:
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import pycountry
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# *****************************************************************************************************************
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# ***** ****
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# *** MACROS / ONE-TIME INIT ***
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# ***** ****
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# *****************************************************************************************************************
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# --- Nothing Yet
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# *****************************************************************************************************************
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# ***** ****
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# *** VARIABLES ***
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# ***** ****
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# *****************************************************************************************************************
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# --- Nothing Yet
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# *****************************************************************************************************************
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# ***** ****
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# *** FUNCTIONS ***
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# ***** ****
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# *****************************************************************************************************************
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class PaymentEvent(BaseModel):
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eventTs: AwareDatetime = Field(
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description = "to know the date and time (utc) of this update",
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frozen = True
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)
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initByPG: bool = Field(
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description = "to figure out whether the payment gateway initiated this event or we did",
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frozen = True
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)
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httpCode: int | None = Field(
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description = "the http code generated by the event",
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frozen = True,
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examples = [200, 400, 401]
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)
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payload: dict = Field(
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description = "the json payload or set of query params received from an event from the payment gateway",
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frozen = True
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)
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# ┏┓ ┏•
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# ┃ ┏┓┏┓╋┓┏┓
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# ┗┛┗┛┛┗┛┗┗┫
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# ┛
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class Config:
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extra = "allow"
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arbitrary_types_allowed = True
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# ┓┏ ┓• ┓ •
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# ┃┃┏┓┃┓┏┫┏┓╋┓┏┓┏┓
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# ┗┛┗┻┗┗┗┻┗┻┗┗┗┛┛┗
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@field_validator("eventTs", mode = "before")
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def parse_date_time(cls, value):
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return date_time.parse_date_time(input_value = value, timezone = date_time.TIMEZONE_UTC)
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# ---------------------------------------------------------------------------------------------------------------------
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class CorePaymentModel(BaseModel):
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paymentId: ObjectId = Field(
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description = "the id of the document in mongodb that holds this information",
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frozen = True,
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default = None,
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alias = "_id"
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)
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paymentStatus: Literal[
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"initFailed", # ... When we tried to initiate the request, but the payment gateway (PG) rejected it.
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"initiated", # .... When we made a successful payment request, or the customer initiated one from the PG.
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"failed", # ....... When the customer tried paying, but it failed (e.g.: because of an incorrect pin).
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"rejected", # ..... When the customer explicitly rejected the payment.
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"authorized", # ... When the customer made the payment (but it hasn't been settled in your account yet).
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"settled", # ...... When the PG sends the money to your account.
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"refunded", # ..... When the money was refunded to the client.
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] = Field(
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description = "the status of the payment request to see what stage of the process we are in",
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frozen = False
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)
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lastEventTs: AwareDatetime = Field(
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description = "the time (utc) at which the latest payment event occurred",
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frozen = True
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)
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tokenId: ObjectId = Field(
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description = "the id of the auth token that is associated with this payment",
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frozen = True
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)
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amount: float | int = Field(
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description = "the amount of money being requested"
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)
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currencyCode: str = Field(
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description = "the three-letter ISO 4217 code to identify the currency",
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frozen = True,
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examples = ["INR", "USD", "KES"]
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)
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metadata: dict | None = Field(
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description = "any arbitrary amount of data to identify the user and payment details",
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frozen = True
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)
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tags: List[Any] = Field(
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description = "a list of keywords to apply to this file/dir to filter it later",
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frozen = False,
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default = [],
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examples = ["renewal", "subscription"]
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)
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client: Literal["razorpay", "safaricomMPesaExpress"] = Field(
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description = "the third-part client that was used",
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frozen = True
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)
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clientPaymentReferenceId: int | str = Field(
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description = "the reference id given by the third-party client",
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frozen = False,
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default = None
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)
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events: List[PaymentEvent] = Field(
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description = "an array of all the events that happened in the process of this payment",
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frozen = False
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)
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# ┏┓ ┏•
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# ┃ ┏┓┏┓╋┓┏┓
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# ┗┛┗┛┛┗┛┗┗┫
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# ┛
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class Config:
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extra = "allow"
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arbitrary_types_allowed = True
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def model_dump(self, *args, **kwargs):
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return super().model_dump(*args, by_alias = True, **kwargs)
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# ┓┏ ┓• ┓ •
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# ┃┃┏┓┃┓┏┫┏┓╋┓┏┓┏┓
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# ┗┛┗┻┗┗┗┻┗┻┗┗┗┛┛┗
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@field_validator("lastEventTs", mode = "before")
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def parse_date_time(cls, value):
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return date_time.parse_date_time(input_value = value, timezone = date_time.TIMEZONE_UTC)
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@field_validator("tokenId", mode = "before")
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def parse_oid(cls, value):
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try:
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if isinstance(value, str):
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value = ObjectId(value)
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except: pass
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return value
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@field_validator("currencyCode", mode = "before")
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def validate_currency(cls, value):
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currency = pycountry.currencies.get(alpha_3 = value)
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if currency is None: raise ValueError("invalid currency code, please use iso 4217 standard")
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return value
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@field_validator("tags", mode = "before")
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def validate_tags(cls, value):
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if value is None: value = []
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return value
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# *****************************************************************************************************************
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# ***** ****
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# *** MAIN PROGRAM ***
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# ***** ****
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# *****************************************************************************************************************
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if __name__ == "__main__":
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from utils_v2.string import json
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now = date_time.get_current_utc_date_time(as_string = False)
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payment = CorePaymentModel(
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paymentStatus = "authorized",
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tokenId = "67519cf3a7804fcbc6f12452",
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amount = 1.00,
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currencyCode = "INR",
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metadata = {
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"userId": 1,
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"name": "Bhopli"
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},
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client = "razorpay",
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clientPaymentReferenceId = "txn_123_abc",
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lastEventTs = now,
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events = [
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PaymentEvent(
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eventTs = now - datetime.timedelta(minutes = 1, seconds = 12),
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initByPG = True,
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httpCode = None,
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payload = {
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"status": "captured",
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"from": "Barfi",
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}
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),
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PaymentEvent(
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eventTs = now,
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initByPG = True,
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httpCode = None,
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payload = {
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"status": "authorized",
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"from": "Barfi",
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"amount": -100.00,
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"description": "meow"
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}
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)
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]
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)
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print("PAYMENT TXN. MODEL:", json.to_string(payment.model_dump(), default = str))
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