Implement link sharing (#213)

* Implement link sharing

* Share default

* Compress and base64 encode data

* Better error messages

* Fix build

* Only change version when it's different

src/app/services/Sharing.ts

@@ -0,0 +1,58 @@
+import lz from 'lz-string'
+import config from '../../config.json'
+import type { VersionId } from './Schemas'
+
+const API_PREFIX = 'https://z15g7can.directus.app/items'
+export const SHARE_KEY = 'share'
+
+const ShareCache = new Map<string, string>()
+
+export async function shareSnippet(type: string, version: VersionId, jsonData: any) {
+	try {
+		const data = lz.compressToBase64(JSON.stringify(jsonData))
+		const raw = btoa(JSON.stringify(jsonData))
+		console.log('Compression rate', raw.length / data.length)
+		const body = JSON.stringify({ data, type, version })
+		let id = ShareCache.get(body)
+		if (!id) {
+			const snippet = await fetchApi('/snippets', body)
+			ShareCache.set(body, snippet.id)
+			id = snippet.id as string
+		}
+		const gen = config.generators.find(g => g.id === type)!
+		return `${location.protocol}//${location.host}/${gen.url}/?${SHARE_KEY}=${id}`
+	} catch (e) {
+		if (e instanceof Error) {
+			e.message = `Error creating share link: ${e.message}`
+		}
+		throw e
+	}
+}
+
+export async function getSnippet(id: string) {
+	try {
+		const snippet = await fetchApi(`/snippets/${id}`)
+		return {
+			...snippet,
+			data: JSON.parse(lz.decompressFromBase64(snippet.data) ?? '{}'),
+		}
+	} catch (e) {
+		if (e instanceof Error) {
+			e.message = `Error loading shared content: ${e.message}`
+		}
+		throw e
+	}
+}
+
+async function fetchApi(url: string, body?: string) {
+	const res = await fetch(API_PREFIX + url, body ? {
+		method: 'post',
+		headers: { 'Content-Type': 'application/json' },
+		body,
+	} : undefined)
+	const data = await res.json()
+	if (data.data) {
+		return data.data
+	}
+	throw new Error(data.errors?.[0]?.message ?? 'Unknown error')
+}

src/app/services/index.ts

@@ -1,3 +1,4 @@
 export * from './Changelogs'
 export * from './DataFetcher'
 export * from './Schemas'
+export * from './Sharing'