84 lines
2.3 KiB
TypeScript
84 lines
2.3 KiB
TypeScript
import { nodeAtPos } from "../../common/tree.ts";
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import {
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filterBox,
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flashNotification,
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getCursor,
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getText,
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replaceRange,
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} from "../../syscall/silverbullet-syscall/editor.ts";
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import { parseMarkdown } from "../../syscall/silverbullet-syscall/markdown.ts";
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import { dispatch as dispatchEvent } from "../../syscall/plugos-syscall/event.ts";
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import { invokeFunction } from "../../syscall/silverbullet-syscall/system.ts";
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type UnfurlOption = {
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id: string;
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name: string;
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};
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export async function unfurlCommand() {
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let mdTree = await parseMarkdown(await getText());
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let nakedUrlNode = nodeAtPos(mdTree, await getCursor());
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let url = nakedUrlNode!.children![0].text!;
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console.log("Got URL to unfurl", url);
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let optionResponses = await dispatchEvent("unfurl:options", url);
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let options: UnfurlOption[] = [];
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for (let resp of optionResponses) {
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options.push(...resp);
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}
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let selectedUnfurl: any = await filterBox(
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"Unfurl",
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options,
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"Select the unfurl strategy of your choice"
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);
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if (!selectedUnfurl) {
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return;
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}
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try {
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let replacement = await invokeFunction(
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"server",
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"unfurlExec",
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selectedUnfurl.id,
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url
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);
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await replaceRange(nakedUrlNode?.from!, nakedUrlNode?.to!, replacement);
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} catch (e: any) {
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await flashNotification(e.message, "error");
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}
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}
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export async function titleUnfurlOptions(url: string): Promise<UnfurlOption[]> {
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return [
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{
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id: "title-unfurl",
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name: "Extract title",
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},
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];
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}
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// Run on the server because plugs will likely rely on fetch for this
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export async function unfurlExec(id: string, url: string): Promise<string> {
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let replacement = await dispatchEvent(`unfurl:${id}`, url);
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if (replacement.length === 0) {
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throw new Error("Unfurl failed");
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} else {
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return replacement[0];
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}
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}
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const titleRegex = /<title[^>]*>\s*([^<]+)\s*<\/title\s*>/i;
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export async function titleUnfurl(url: string): Promise<string> {
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let response = await fetch(url);
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if (response.status < 200 || response.status >= 300) {
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console.error("Unfurl failed", await response.text());
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throw new Error(`Failed to fetch: ${await response.statusText}`);
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}
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let body = await response.text();
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let match = titleRegex.exec(body);
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if (match) {
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return `[${match[1]}](${url})`;
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} else {
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throw new Error("No title found");
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}
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}
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