86 lines
2.5 KiB
TypeScript
86 lines
2.5 KiB
TypeScript
import {
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DSQL_FieldSchemaType,
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DSQL_MYSQL_SHOW_COLUMNS_Type,
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} from "../../types";
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import dbHandler from "../../functions/backend/dbHandler";
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import defaultFieldsRegexp from "../../functions/dsql/default-fields-regexp";
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import generateColumnDescription from "./generateColumnDescription";
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type Param = {
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dbFullName: string;
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tableName: string;
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fields: DSQL_FieldSchemaType[];
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clone?: boolean;
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allExistingColumns: DSQL_MYSQL_SHOW_COLUMNS_Type[];
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};
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/**
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* Handle DATASQUIREL schema fields for current table
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* ===================================================
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* @description Iterate through each field object and
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* perform operations
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*/
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export default async function handleDSQLSchemaFields({
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dbFullName,
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tableName,
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fields,
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allExistingColumns,
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}: Param) {
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let sql = `ALTER TABLE \`${dbFullName}\`.\`${tableName}\``;
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for (let i = 0; i < fields.length; i++) {
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const column = fields[i];
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// const prevColumn = fields[i - 1];
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// const nextColumn = fields[i + 1];
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const { fieldName, dataType, foreignKey } = column;
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if (!fieldName) continue;
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if (defaultFieldsRegexp.test(fieldName)) continue;
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let updateText = "";
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const existingColumnIndex = allExistingColumns?.findIndex(
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(_column, _index) => _column.Field === fieldName
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);
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const existingColumn =
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existingColumnIndex >= 0
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? allExistingColumns[existingColumnIndex]
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: undefined;
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let { fieldEntryText } = generateColumnDescription({
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columnData: column,
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});
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/**
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* @description Modify Column(Field) if it already exists
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* in MYSQL database
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*/
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if (existingColumn?.Field) {
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const { Field, Type } = existingColumn;
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updateText += ` MODIFY COLUMN ${fieldEntryText}`;
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} else {
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/**
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* @description Append new column to the end of existing columns
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*/
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updateText += ` ADD COLUMN ${fieldEntryText}`;
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}
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/**
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* @description Pust SQL code snippet to updateTableQueryArray Array
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* Add a comma(,) to separate from the next snippet
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*/
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if (updateText.match(/./)) {
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sql += " " + updateText + ",";
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}
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}
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const finalSQL = sql.replace(/\,$/, "");
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const updateTable = await dbHandler({
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query: finalSQL,
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});
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}
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