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import * as flags from "https://deno.land/[email protected]/flags/mod.ts"; |
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import * as fs from "https://deno.land/[email protected]/fs/mod.ts"; |
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import * as path from "https://deno.land/[email protected]/path/mod.ts"; |
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type EntryId = string; |
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type EntryGraph = Map<EntryId, Set<EntryId>>; |
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|
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function buildEntryGraph(dir: string): EntryGraph { |
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const entries = new Map<EntryId, Set<EntryId>>(); |
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const root = path.resolve(dir); |
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for (const entry of fs.walkSync(root)) { |
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if (entry.isFile === false) continue; |
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const filename = entry.path; |
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if (path.extname(filename) !== ".md") continue; |
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const [yyyy, mm, dd, _] = path.basename(filename, ".md").split("-"); |
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const entryId = [yyyy, mm, dd].join("-"); |
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const data = fs.readFileStrSync(filename, { |
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encoding: "utf8", |
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}); |
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const linkedEntryIds = new Set<EntryId>(); // mutable |
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for ( |
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const m of data.matchAll( |
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/https?:\/\/blog\.bouzuya\.net\/(\d\d\d\d\/\d\d\/\d\d)\//g, |
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) |
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) { |
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const linkedEntryId = m[1].split("/").join("-"); |
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linkedEntryIds.add(linkedEntryId); |
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} |
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entries.set(entryId, linkedEntryIds); |
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} |
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return entries; |
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} |
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function toJson(graph: EntryGraph): string { |
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type JsonMap<T> = { [key: string]: T }; |
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type JsonSet = JsonMap<null>; |
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const json: JsonMap<JsonSet> = {}; // mutable |
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for (const [entryId, linkedEntryIds] of graph) { |
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const set: { [entryId: string]: null } = {}; // mutable |
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for (const linkedEntryId of linkedEntryIds) { |
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set[linkedEntryId] = null; |
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} |
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json[entryId] = set; |
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} |
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return JSON.stringify(json); |
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} |
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export function main(): void { |
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const { args } = Deno; |
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const { dir } = flags.parse(args); |
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if (typeof dir !== "string") throw new Error("dir is not string"); |
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const graph = buildEntryGraph(dir); |
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console.log(toJson(graph)); |
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} |
