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import { parse as dateParse} from 'date-format-parse';
import { inject, injectable } from 'inversify';
import ILogger from '../../core/contracts/ILogger';
import ITransactionDataProvider from '../../core/contracts/ITransactionDataProvider';
import { injectables } from '../../core/types/injectables';
import TransactionData from '../../core/types/transactionData';
import EntryType from '../../core/enums/entryType';
import { TRANSACTION_TYPES } from '../../core/types/transactionTypeString';
import transactionTypesByString from '../../core/types/transactionTypeByString'
import TransactionType from '../../core/enums/transactionType';
@injectable()
export default class GmailTransactionDataProvider implements ITransactionDataProvider {
private readonly logger: ILogger;
public constructor(
@inject(injectables.ILogger)
logger: ILogger
) {
this.logger = logger;
}
public get(transactionDataRaw: string) {
const transactionDataHtml = this.parseTransactionDataHtml(transactionDataRaw);
const date = this.parseDate(transactionDataHtml);
const reference = this.parseReference(transactionDataHtml);
const valueDate = this.parseValueDate(transactionDataHtml);
const sum = this.parseSum(transactionDataHtml);
const entryType = this.parseEntryType(transactionDataHtml, reference);
const {
transactionType,
paymentDetailsRaw
} = this.parseTransactionType(transactionDataHtml, reference);
const additionalDetailsRaw = this.parseAdditionalDetails(transactionDataHtml);
const transactionData: TransactionData = {
date,
reference,
valueDate,
sum,
entryType,
transactionType,
paymentDetailsRaw,
additionalDetailsRaw: additionalDetailsRaw
};
return transactionData;
}
private parseTransactionDataHtml(attachmentData: string) {
const transactionData = htmlParse(attachmentData)
.childNodes[1] // <html>
?.childNodes[3] // <body>
?.childNodes[12] // <table>
?.childNodes[5] // <tr>
?.childNodes; // <td>[]
return transactionData;
}
private parseDate(transactionData: Node[]) {
const date = dateParse(transactionData
?.[1]
?.childNodes[0]
?.rawText
?.padUTCTimezone(), 'DD.MM.YYYY HH:mm:ssZ') // Parse as UTC to avoid any client-side conversion side-effects
?.fromLocaltoUTC(); // Treat the parsed datetime as localised so convert it to UTC
return date;
}
private parseReference(transactionData: Node[]) {
const reference = transactionData
?.[3]
?.childNodes[1]
?.childNodes[0]
?.rawText;
return reference;
}
private parseValueDate(transactionData: Node[]) {
const valueDate = dateParse(transactionData
?.[5]
?.childNodes[0]
?.rawText
?.padTime()
?.padUTCTimezone(), 'DD.MM.YYYY HH:mm:ssZ'); // Value date is date-only, so treat it as midnight UTC to avoid any client-side conversion side-effects
return valueDate;
}
private parseSum(transactionData: Node[]) {
const sum = transactionData
?.[7]
?.childNodes[0]
?.rawText;
return sum;
}
private parseEntryType(transactionData: Node[], transactionReference: string) {
const entryTypeStr = transactionData?.[9]
?.childNodes[0]
?.rawText;
const entryType: EntryType = (entryTypeStr == 'ДТ' || entryTypeStr == 'DR')
? EntryType.DEBIT
: (entryTypeStr == 'КТ' || entryTypeStr == 'CR')
? EntryType.CREDIT
: EntryType.INVALID;
if (entryType === EntryType.INVALID) {
this.logger.warn(`Unregonised entry type '${entryTypeStr}'`, { transactionReference: transactionReference });
}
return entryType;
}
private parseTransactionType(transactionData: Node[], transactionReference: string) {
const maxDataLineLength = 100;
const dataElements = transactionData
?.[11]
?.childNodes;
const dataRaw = dataElements
?.reduce((accumulator, current, i) => {
const currentString = current.toString();
// Treat <br> variants as linebreaks
if (currentString === '<br>' || currentString === '<br />') {
return accumulator;
}
// Don't treat <wbr> as a linebreak
if (accumulator.length > 0 && accumulator[accumulator.length-1] === '<wbr>') {
accumulator.pop(); // pop the <wbr>
const last = accumulator.pop(); // pop and collect the element preceeding <wbr>
const updated = last?.concat(currentString) // combine the last element with the current one
accumulator.push(updated ?? currentString); // push either the concatenated elements, or only the current one
return accumulator;
}
// Don't add <wbr> if it's the last element (meaning it won't be removed by the previous clause)
Iif (i == dataElements.length && currentString === '<wbr>') {
return accumulator;
}
// If the current element is longer than the maximum data line length, append the last element to it
if (accumulator.length > 0 && currentString.length >= maxDataLineLength) {
const last = accumulator.pop()!; // pop and colect the last element
const updated = currentString.concat(last); // combine the current element with the last one
accumulator.push(updated);
return accumulator;
}
accumulator.push(currentString);
return accumulator;
}, [] as string[]);
const typeRegex = new RegExp(`([ ]?[\/]?(${TRANSACTION_TYPES.join('|')})[ ]?)`);
const found = dataRaw
?.map(e => typeRegex.exec(e)?.[2])
?.flat()
?.[0] ?? null;
const typeByString = found as keyof typeof transactionTypesByString;
const valid =
found !== null &&
TRANSACTION_TYPES.includes(typeByString);
const transactionType = valid
? transactionTypesByString[typeByString]
: TransactionType.UNKNOWN;
if (transactionType === TransactionType.UNKNOWN) {
this.logger.warn(`Unknown transaction type '${found}'`, { transactionReference: transactionReference });
}
const paymentDetailsRaw = dataRaw
?.map(e => e.replace(typeRegex, ''))
?.filter(e => e != '');
return { transactionType, paymentDetailsRaw };
}
private parseAdditionalDetails(transactionData: Node[]) {
const additionalDetailsNode = transactionData
?.[13]
?.childNodes
?.[1];
const additionalDetails = additionalDetailsNode
?.childNodes
?.map(e => e.rawText.split('\n'))
?.flat()
?.map(e => e.trim())
?.filter(e => e != '') ?? [];
return additionalDetails;
}
} |