plugin integration round 2

quartz/plugins/transformers/lastmod.ts

@@ -0,0 +1,80 @@
+import { PluggableList } from "unified"
+import fs from "fs"
+import path from 'path'
+import { Repository } from "@napi-rs/simple-git"
+import { QuartzTransformerPlugin } from "../types"
+
+export interface Options {
+  priority: ('frontmatter' | 'git' | 'filesystem')[],
+}
+
+const defaultOptions: Options = {
+  priority: ['frontmatter', 'git', 'filesystem']
+}
+
+export class CreatedModifiedDate extends QuartzTransformerPlugin {
+  name = "CreatedModifiedDate"
+  opts: Options
+
+  constructor(opts?: Options) {
+    super()
+    this.opts = {
+      ...defaultOptions,
+      ...opts,
+    }
+  }
+
+  markdownPlugins(): PluggableList {
+    return [
+      () => {
+        let repo: Repository | undefined = undefined
+        return async (_tree, file) => {
+          let created: undefined | Date = undefined
+          let modified: undefined | Date = undefined
+          let published: undefined | Date = undefined
+
+          const fp = path.join(file.cwd, file.data.filePath as string)
+          for (const source of this.opts.priority) {
+            if (source === "filesystem") {
+              const st = await fs.promises.stat(fp)
+              created ||= new Date(st.birthtimeMs)
+              modified ||= new Date(st.mtimeMs)
+            } else if (source === "frontmatter" && file.data.frontmatter) {
+              created ||= file.data.frontmatter.date
+              modified ||= file.data.frontmatter.lastmod
+              modified ||= file.data.frontmatter["last-modified"]
+              published ||= file.data.frontmatter.publishDate
+            } else if (source === "git") {
+              console.log(file)
+              if (!repo) {
+                repo = new Repository(file.cwd)
+              }
+
+              modified ||= new Date(await repo.getFileLatestModifiedDateAsync(fp))
+            }
+          }
+
+          file.data.dates = {
+            created: created ?? new Date(),
+            modified: modified ?? new Date(),
+            published: published ?? new Date()
+          }
+        }
+      }
+    ]
+  }
+
+  htmlPlugins(): PluggableList {
+    return []
+  }
+}
+
+declare module 'vfile' {
+  interface DataMap {
+    dates: {
+      created: Date
+      modified: Date
+      published: Date
+    }
+  }
+}