add file

src/core/handlers/qrcode.ts

@@ -0,0 +1,51 @@
+/*
+ * qrcode.ts
+ *
+ * Copyright (C) 2022-2024 Posit Software, PBC
+ */
+
+import { LanguageCellHandlerContext, LanguageHandler } from "./types.ts";
+import { baseHandler, install } from "./base.ts";
+import { asMappedString, MappedString } from "../lib/mapped-text.ts";
+
+import { DirectiveCell } from "../lib/break-quarto-md-types.ts";
+
+import QRCode from "qrcode";
+
+const qrHandler: LanguageHandler = {
+  ...baseHandler,
+
+  languageName: "qr",
+
+  type: "directive",
+  stage: "pre-engine",
+
+  async directive(
+    _handlerContext: LanguageCellHandlerContext,
+    directive: DirectiveCell,
+  ): Promise<MappedString> {
+    const param = directive.shortcode.params[0];
+
+    const dataUrl = await (new Promise((resolve, reject) => {
+      // deno-lint-ignore no-explicit-any
+      QRCode.toDataURL(param, (err: any, url: any) => {
+        if (err) {
+          reject(err);
+        } else {
+          resolve(url);
+        }
+      });
+    }));
+
+    let opts = directive.shortcode.rawParams.slice(1).map((param) => {
+      if (param.name) {
+        return ` ${param.name}="${param.value}"`;
+      } else {
+        return ` ${param.value}`;
+      }
+    }).join("");
+    return asMappedString(`![](${dataUrl}){.qrcode${opts}}`);
+  },
+};
+
+install(qrHandler);