added doc export node

node-red-grist/document-export.js

@@ -0,0 +1,39 @@
+const fetch = (...args) => import('node-fetch').then(({ default: fetch }) => fetch(...args));
+
+module.exports = function (RED) {
+    function DocumentExportNode(config) {
+        RED.nodes.createNode(this, config);
+        let node = this;
+        this.document = RED.nodes.getNode(config.document);
+        this.server = RED.nodes.getNode(config.server);
+        this.format = config.format
+
+        node.on('input', async function (msg, send, done) {
+            const protocol = this.server.tlsEnabled === true ? "https" : "http";
+            const url = protocol + "://" + this.server.hostname + ":" + this.server.port;
+
+            var requestUrl;
+            switch (this.format) {
+                case "excel": requestUrl = `${url}/api/docs/${this.document.docid}/download`
+                    break;
+                case "sqlite": requestUrl = `${url}/api/docs/${this.document.docid}/download/xlsx`
+                    break;
+                default:
+                    done("Unsupported format " + this.format);
+            }
+
+            fetch(requestUrl, {
+                headers: {
+                    'authorization': `Bearer ${this.server.apiKey}`
+                }
+            }).then(async (response) => {
+                const blob = await response.blob()
+                const arrayBuffer = await blob.arrayBuffer();
+                const buffer = Buffer.from(arrayBuffer);
+                node.send({ ...msg, payload: buffer })
+
+            }).catch(reason => done(reason, "Failed to perform grist request to " + url));
+        });
+    }
+    RED.nodes.registerType("grist-document-export", DocumentExportNode);
+}