Replace lodash by modern JavaScript functions (#20)

* Replace lodash by built-in functions

* .flatMap -> .flat

eslint.config.js

@@ -29,6 +29,7 @@ const config = [
 			'@stylistic/multiline-comment-style': 'off',
 			'@stylistic/multiline-ternary': ['error', 'always-multiline'],
 			'@stylistic/newline-per-chained-call': ['error', {ignoreChainWithDepth: 1}],
+			'@stylistic/no-extra-parens': 'off',
 			'@stylistic/no-mixed-operators': 'off',
 			'@stylistic/no-tabs': 'off',
 			'@stylistic/object-property-newline': 'off',

format/products-filter.js

@@ -1,4 +1,4 @@
-import isObj from 'lodash/isObject.js';
+const isObj = element => element !== null && 'object' === typeof element && !Array.isArray(element);
 
 const hasProp = (o, k) => Object.prototype.hasOwnProperty.call(o, k);
 

index.js

@@ -1,9 +1,10 @@
-import isObj from 'lodash/isObject.js';
 import distance from 'gps-distance';
 
 import {defaultProfile} from './lib/default-profile.js';
 import {validateProfile} from './lib/validate-profile.js';
 
+const isObj = element => element !== null && 'object' === typeof element && !Array.isArray(element);
+
 // background info: https://github.com/public-transport/hafas-client/issues/286
 const FORBIDDEN_USER_AGENTS = [
 	'my-awesome-program', // previously used in readme.md, p/*/readme.md & docs/*.md

package-lock.json

@@ -14,7 +14,6 @@
 				"db-hafas-stations": "^1.0.0",
 				"gps-distance": "0.0.4",
 				"https-proxy-agent": "^7.0.0",
-				"lodash": "^4.17.5",
 				"luxon": "^3.1.1",
 				"qs": "^6.6.0",
 				"slugg": "^1.2.0",
@@ -4867,6 +4866,7 @@
 			"version": "4.17.21",
 			"resolved": "https://registry.npmjs.org/lodash/-/lodash-4.17.21.tgz",
 			"integrity": "sha512-v2kDEe57lecTulaDIuNTPy3Ry4gLGJ6Z1O3vE1krgXZNrsQ+LFTGHVxVjcXPs17LhbZVGedAJv8XZ1tvj5FvSg==",
+			"dev": true,
 			"license": "MIT"
 		},
 		"node_modules/lodash-es": {

package.json

@@ -61,7 +61,6 @@
 		"db-hafas-stations": "^1.0.0",
 		"gps-distance": "0.0.4",
 		"https-proxy-agent": "^7.0.0",
-		"lodash": "^4.17.5",
 		"luxon": "^3.1.1",
 		"qs": "^6.6.0",
 		"slugg": "^1.2.0",

parse/polyline.js

@@ -1,11 +1,11 @@
-import maxBy from 'lodash/maxBy.js';
-
 const parsePolyline = (ctx, p) => { // p = raw polylineGroup
 	const desc = p.polylineDescriptions || p.polylineDesc;
 	if (desc.length < 1) {
 		return null;
 	}
-	const points = maxBy(desc, d => d.coordinates.length).coordinates; // TODO initial and final poly?
+	const points = desc.reduce((max, d) => (d.coordinates.length > max.coordinates.length ? d : max),
+	).coordinates; // TODO: initial and final poly?
+
 	if (points.length === 0) {
 		return null;
 	}

parse/remarks.js

@@ -1,8 +1,6 @@
-import flatMap from 'lodash/flatMap.js';
-
 const parseRemarks = (ctx, ref) => {
 	// TODO ereignisZusammenfassung, priorisierteMeldungen?
-	return flatMap([
+	return [
 		ref.disruptions || [],
 		ref.risNotizen || [],
 		ref.echtzeitNotizen && ref.echtzeitNotizen.map(e => {
@@ -18,7 +16,7 @@ const parseRemarks = (ctx, ref) => {
 		ref.attributNotizen || [],
 		ref.attributes || [],
 		ref.verkehrsmittel?.zugattribute || [],
-	])
+	].flat()
 		.map(remark => {
 			if (remark.kategorie || remark.priority) {
 				const res = ctx.profile.parseHintByCode(remark);