Merge pull request #2 from Jmurp11/fix/error-handling

Fix/error handling

.eslintrc.json

@@ -1,36 +1,19 @@
 {
-    "env": {
-        "browser": true,
-        "es2021": true
-    },
-    "extends": [
-        "eslint:recommended",
-        "plugin:@typescript-eslint/recommended"
-    ],
-    "parser": "@typescript-eslint/parser",
-    "parserOptions": {
-        "ecmaVersion": 12,
-        "sourceType": "module"
-    },
-    "plugins": [
-        "@typescript-eslint"
-    ],
-    "rules": {
-        "indent": [
-            "error",
-            "tab"
-        ],
-        "linebreak-style": [
-            "error",
-            "unix"
-        ],
-        "quotes": [
-            "error",
-            "single"
-        ],
-        "semi": [
-            "error",
-            "always"
-        ]
-    }
+  "env": {
+    "browser": true,
+    "es2022": true
+  },
+  "extends": ["eslint:recommended", "plugin:@typescript-eslint/recommended"],
+  "parser": "@typescript-eslint/parser",
+  "parserOptions": {
+    "ecmaVersion": 12,
+    "sourceType": "module"
+  },
+  "plugins": ["@typescript-eslint"],
+  "rules": {
+    "indent": ["error", "tab"],
+    "linebreak-style": ["error", "unix"],
+    "quotes": ["error", "single"],
+    "semi": ["error", "always"]
+  }
 }

README.md

@@ -1,4 +1,5 @@
 # excel-to-postgres
+
 Quickly export an Excel Workbook to a Postgres DB
 
 # Installation
@@ -32,12 +33,14 @@ excelToPostgresDb({
 
 Supports four options, all of which are optional:
 
-* *createDatabase* - _true | false_ (Defaults to false)
-* *createTables* - _true | false_ (Defaults to false)
-* *generatePrimaryKey* - _true | false_ (Defaults to false.  Generates 'id' column to be used as a primary key.  Cannot be used with 'useExistingPrimaryKeys' option)
-* *useExistingPrimaryKeys* - _true | false_ (Defaults to false.  Supports multiple primary keys.  Append '_pk' to the column name in the workbook that will be the primary key.  Cannot be used with 'generatePrimaryKey' option)
+-   _createDatabase_ - _true | false_ (Defaults to false)
+-   _createTables_ - _true | false_ (Defaults to false)
+-   _dropTables_ - _true | false_ (Defaults to false. When creating table, drop the table if it already exists)
+-   _generatePrimaryKey_ - _true | false_ (Defaults to false. Generates 'id' column to be used as a primary key. Cannot be used with 'useExistingPrimaryKeys' option)
+-   _useExistingPrimaryKeys_ - _true | false_ (Defaults to false. Supports multiple primary keys. Append '\_pk' to the column name in the workbook that will be the primary key. Cannot be used with 'generatePrimaryKey' option)
+
 # Testing
 
-This package's tests are written using [Jest](https://jestjs.io/).  To execute, run:
+This package's tests are written using [Jest](https://jestjs.io/). To execute, run:
 
-`npm test`
+`npm test`

package.json

@@ -38,7 +38,6 @@
     "@types/jest": "~29.5.11",
     "@types/node": "~20.10.6",
     "@types/pg": "~8.10.9",
-    "@types/xlsx": "~0.0.35",
     "@typescript-eslint/eslint-plugin": "~6.18.0",
     "@typescript-eslint/parser": "~6.18.0",
     "cz-conventional-changelog": "~3.3.0",

src/etl-processes.ts

@@ -1,28 +1,28 @@
 export enum SQLType {
-  VARCHAR = 'VARCHAR',
-  BOOLEAN = 'BOOLEAN',
-  FLOAT = 'FLOAT',
-  INT = 'INT',
+	VARCHAR = 'VARCHAR',
+	BOOLEAN = 'BOOLEAN',
+	FLOAT = 'FLOAT',
+	INT = 'INT',
 }
 
 export enum SQLKeyword {
-  PRIMARY_KEY = 'PRIMARY KEY',
-  NOT_NULL = 'NOT NULL',
-  SERIAL = 'SERIAL',
+	PRIMARY_KEY = 'PRIMARY KEY',
+	NOT_NULL = 'NOT NULL',
+	SERIAL = 'SERIAL',
 }
 export interface Column {
-  name: string;
-  type: string;
+	name: string;
+	type: string;
 }
 
 export interface Fields<T> {
-  names: string[];
-  values: T[];
+	names: string[];
+	values: T[];
 }
 
 interface FormatColumnsResult {
-  formattedColumns: string[];
-  primaryKeyIndex: number[];
+	formattedColumns: string[];
+	primaryKeyIndex: number[];
 }
 
 export function getFields<T>(data: T): Fields<T> {
@@ -35,32 +35,33 @@ export function getFields<T>(data: T): Fields<T> {
 export function getColumns<T>(fields: Fields<T>): Column[] {
 	return fields.values.map((value: T, index: number) => {
 		switch (typeof value) {
-		case 'string':
-			return {
-				name: fields.names[index],
-				type: SQLType.VARCHAR,
-			};
-		case 'number':
-			return {
-				name: fields.names[index],
-				type: SQLType.FLOAT,
-			};
-		case 'boolean':
-			return {
-				name: fields.names[index],
-				type: SQLType.BOOLEAN,
-			};
-		default:
-			break;
+			case 'string':
+				return {
+					name: fields.names[index],
+					type: SQLType.VARCHAR,
+				};
+			case 'number':
+				return {
+					name: fields.names[index],
+					type: SQLType.FLOAT,
+				};
+			case 'boolean':
+				return {
+					name: fields.names[index],
+					type: SQLType.BOOLEAN,
+				};
+			default:
+				break;
 		}
 	});
 }
 
 export function formatColumns(columns: Column[]): FormatColumnsResult {
 	const primaryKeyIndex: number[] = [];
 
-	const formattedColumns: string[] = columns.map((col: Column, index: number) =>
-		formatColumn(col, primaryKeyIndex, index)
+	const formattedColumns: string[] = columns.map(
+		(col: Column, index: number) =>
+			formatColumn(col, primaryKeyIndex, index)
 	);
 
 	return { formattedColumns, primaryKeyIndex: primaryKeyIndex };
@@ -85,7 +86,7 @@ export function checkPrimaryKey(col: string): boolean {
 
 	if (
 		col.substring(col.length, col.length - 3).toUpperCase() ===
-    primaryKeyIndicator.toUpperCase()
+		primaryKeyIndicator.toUpperCase()
 	) {
 		return true;
 	}

src/excel.ts

@@ -1,16 +1,16 @@
 import * as XLSX from 'xlsx';
 
 interface Worksheet<T> {
-  title: string;
-  data: T[];
+	title: string;
+	data: T[];
 }
 
 export function readExcel<T>(file: string): Worksheet<T>[] {
 	try {
 		const workbook = XLSX.readFile(file);
 		return getWorkSheets(workbook);
 	} catch (err) {
-		console.error(err);
+		throw new Error(err);
 	}
 }
 
@@ -23,6 +23,6 @@ function getWorkSheets<T>(workbook: XLSX.WorkBook): Worksheet<T>[] {
 			}),
 		}));
 	} catch (err) {
-		console.error(err);
+		throw new Error(err);
 	}
 }

src/main.ts

@@ -1 +1 @@
-export { excelToPostgresDb } from "./sql";
+export { excelToPostgresDb } from './sql';