Encode Automerge docs for Camino CRDT writes

dist/src/crdt-automerge.js

@@ -1,6 +1,25 @@
 import * as Automerge from "@automerge/automerge";
-const bytesToBase64 = (value) => Buffer.from(value).toString("base64");
-const base64ToBytes = (value) => Buffer.from(value, "base64");
+const bytesToBase64 = (value) => {
+    if (typeof Buffer !== "undefined") {
+        return Buffer.from(value).toString("base64");
+    }
+    let binary = "";
+    for (const byte of value) {
+        binary += String.fromCharCode(byte);
+    }
+    return btoa(binary);
+};
+const base64ToBytes = (value) => {
+    if (typeof Buffer !== "undefined") {
+        return Buffer.from(value, "base64");
+    }
+    const binary = atob(value);
+    const bytes = new Uint8Array(binary.length);
+    for (let index = 0; index < binary.length; index += 1) {
+        bytes[index] = binary.charCodeAt(index);
+    }
+    return bytes;
+};
 export const isCaminoCrdtEnvelope = (value) => Boolean(value) &&
     typeof value === "object" &&
     !Array.isArray(value) &&
@@ -27,12 +46,28 @@ export const saveAutomergeFieldDoc = (doc, type) => ({
     $caminoCrdtPayload: bytesToBase64(Automerge.save(doc)),
 });
 export const createAutomergeFieldValue = (value, type) => saveAutomergeFieldDoc(Automerge.from({ value }), type);
-export const normalizeAutomergeFieldValue = (value, type) => {
+export const isAutomergeFieldDoc = (value) => {
+    if (!value || typeof value !== "object") {
+        return false;
+    }
+    try {
+        Automerge.getHeads(value);
+        return true;
+    }
+    catch {
+        return false;
+    }
+};
+export const encodeAutomergeFieldWrite = (value, type) => {
     if (isCaminoCrdtEnvelope(value)) {
         return saveAutomergeFieldDoc(loadAutomergeFieldDoc(value, type), type);
     }
+    if (isAutomergeFieldDoc(value)) {
+        return saveAutomergeFieldDoc(value, type);
+    }
     return createAutomergeFieldValue(value, type);
 };
+export const normalizeAutomergeFieldValue = (value, type) => encodeAutomergeFieldWrite(value, type);
 export const materializeAutomergeFieldValue = (value, type) => loadAutomergeFieldDoc(value, type).value;
 export const mergeAutomergeFieldValues = ({ existing, incoming, type, }) => {
     const incomingDoc = loadAutomergeFieldDoc(normalizeAutomergeFieldValue(incoming, type), type);