feat: allow embedding youtube videos with the obsidian markdown syntax (#665)

jeff

2024-01-02 88194ac348222f9e3deed92f6e149da23a644311

 quartz/plugins/transformers/ofm.ts

@@ -25,6 +25,7 @@
  parseTags: boolean
  parseBlockReferences: boolean
  enableInHtmlEmbed: boolean
  enableYouTubeEmbed: boolean
}

const defaultOptions: Options = {
@@ -36,6 +37,7 @@
  parseTags: true,
  parseBlockReferences: true,
  enableInHtmlEmbed: false,
  enableYouTubeEmbed: false,
}

const icons = {
@@ -127,6 +129,7 @@
// (?:\/[-_\p{L}\d\p{Z}]+)*)   -> non-capturing group, matches an arbitrary number of tag strings separated by "/"
const tagRegex = new RegExp(/(?:^| )#((?:[-_\p{L}\p{Emoji}\d])+(?:\/[-_\p{L}\p{Emoji}\d]+)*)/, "gu")
const blockReferenceRegex = new RegExp(/\^([A-Za-z0-9]+)$/, "g")
const ytLinkRegex = /^.*(youtu.be\/|v\/|u\/\w\/|embed\/|watch\?v=|\&v=)([^#\&\?]*).*/

export const ObsidianFlavoredMarkdown: QuartzTransformerPlugin<Partial<Options> | undefined> = (
  userOpts,
@@ -505,6 +508,30 @@
        })
      }

      if (opts.enableYouTubeEmbed) {
        plugins.push(() => {
          return (tree: HtmlRoot) => {
            visit(tree, "element", (node) => {
              if (node.tagName === "img" && typeof node.properties.src === "string") {
                const match = node.properties.src.match(ytLinkRegex)
                const videoId = match && match[2].length == 11 ? match[2] : null
                if (videoId) {
                  node.tagName = "iframe"
                  node.properties = {
                    class: "external-embed",
                    allow: "fullscreen",
                    frameborder: 0,
                    width: "600px",
                    height: "350px",
                    src: `https://www.youtube.com/embed/${videoId}`,
                  }
                }
              }
            })
          }
        })
      }

      return plugins
    },
    externalResources() {