Added download function using fetch and links

package-lock.json

@@ -1,12 +1,12 @@
 {
 	"name": "@ztimson/utils",
-	"version": "0.3.0",
+	"version": "0.4.0",
 	"lockfileVersion": 3,
 	"requires": true,
 	"packages": {
 		"": {
 			"name": "@ztimson/utils",
-			"version": "0.3.0",
+			"version": "0.4.0",
 			"license": "MIT",
 			"devDependencies": {
 				"@types/jest": "^29.5.12",

package.json

@@ -1,6 +1,6 @@
 {
 	"name": "@ztimson/utils",
-	"version": "0.3.0",
+	"version": "0.5.0",
 	"description": "Utility library",
 	"author": "Zak Timson",
 	"license": "MIT",

src/aset.ts

@@ -0,0 +1,58 @@
+export class ASet<T> extends Array {
+	get size() {
+		return this.length;
+	}
+
+	constructor(elements: T[] = []) {
+		super();
+		if(!!elements?.['forEach'])
+			elements.forEach(el => this.add(el));
+	}
+
+	add(el: T) {
+		if(!this.has(el)) this.push(el);
+	}
+
+	delete(el: T) {
+		const index = this.indexOf(el);
+		if(index != -1) this.slice(index, 1);
+	}
+
+	difference(set: ASet<T>) {
+		return new ASet<T>(this.reduce((acc, el) => {
+			if(!set.has(el)) acc.push(el);
+			return acc;
+		}, []));
+	}
+
+	has(el: T) {
+		return this.indexOf(el) != -1;
+	}
+
+	intersection(set: ASet<T>) {
+		return new ASet<T>(this.reduce((acc, el) => {
+			if(set.has(el)) acc.push(el);
+			return acc;
+		}, []));
+	}
+
+	isDisjointFrom(set: ASet<T>) {
+		return this.intersection(set).size == 0;
+	}
+
+	isSubsetOf(set: ASet<T>) {
+		return this.findIndex(el => !set.has(el)) == -1;
+	}
+
+	isSuperset(set: ASet<T>) {
+		return set.findIndex(el => !this.has(el)) == -1;
+	}
+
+	symmetricDifference(set: ASet<T>) {
+		return new ASet([...this.difference(set), ...set.difference(this)]);
+	}
+
+	union(set: ASet<T> | Array<T>) {
+		return new ASet([...this, ...set]);
+	}
+}

src/index.ts

@@ -1,4 +1,5 @@
 export * from './array';
+export * from './aset';
 export * from './emitter';
 export * from './errors';
 export * from './logger';

src/xhr.ts

@@ -7,6 +7,7 @@ export type RequestOptions = {
 	method?: 'GET' | 'POST' | 'PATCH' | 'DELETE';
 	body?: any;
 	headers?: {[key: string | symbol]: string | null | undefined};
+	skipConverting?: boolean;
 	[key: string]: any;
 }
 
@@ -44,6 +45,14 @@ export class XHR {
 		return () => { this.interceptors[key] = <any>null; }
 	}
 
+	download(opts: RequestOptions & {url: string}) {
+		this.request<Response>({...opts, skipConverting: true}).then(async resp => {
+			const blob = await resp.blob();
+			download(URL.createObjectURL(blob), <string>opts.url.split('/').pop());
+			URL.revokeObjectURL(opts.url);
+		});
+	}
+
 	async request<T>(opts: RequestOptions = {}): Promise<T>  {
 		if(!this.opts.url && !opts.url) throw new Error('URL needs to be set');
 		const url = (opts.url?.startsWith('http') ? opts.url : (this.opts.url || '') + (opts.url || '')).replace(/([^:]\/)\/+/g, '$1');
@@ -67,9 +76,18 @@ export class XHR {
 			}
 
 			if(!resp.ok) throw new Error(resp.statusText);
-			if(resp.headers.get('Content-Type')?.startsWith('application/json')) return await resp.json();
+			if(!opts.skipConverting && resp.headers.get('Content-Type')?.startsWith('application/json')) return await resp.json();
-			if(resp.headers.get('Content-Type')?.startsWith('text/plain')) return await <any>resp.text();
+			if(!opts.skipConverting && resp.headers.get('Content-Type')?.startsWith('text/plain')) return await <any>resp.text();
 			return resp;
 		});
 	}
 }
+
+export function download(href: any, name: string) {
+	const a = document.createElement('a');
+	a.href = href;
+	a.download = name;
+	document.body.appendChild(a);
+	a.click();
+	document.body.removeChild(a);
+}