From aa78c1105e7b6b74d6185cc33daa42f93ccbea58 Mon Sep 17 00:00:00 2001
From: Florian Dold <florian@dold.me>
Date: Tue, 2 Nov 2021 16:20:39 +0100
Subject: anastasis-core: provide reducer CLI, refactor state machine

---
 packages/anastasis-core/src/cli.ts | 64 ++++++++++++++++++++++++++++++++++++++
 1 file changed, 64 insertions(+)
 create mode 100644 packages/anastasis-core/src/cli.ts

(limited to 'packages/anastasis-core/src/cli.ts')

diff --git a/packages/anastasis-core/src/cli.ts b/packages/anastasis-core/src/cli.ts
new file mode 100644
index 000000000..5ab7af6db
--- /dev/null
+++ b/packages/anastasis-core/src/cli.ts
@@ -0,0 +1,64 @@
+import { clk } from "@gnu-taler/taler-util";
+import {
+  getBackupStartState,
+  getRecoveryStartState,
+  reduceAction,
+} from "./index.js";
+import fs from "fs";
+
+export const reducerCli = clk
+  .program("reducer", {
+    help: "Command line interface for the GNU Taler wallet.",
+  })
+  .flag("initBackup", ["-b", "--backup"])
+  .flag("initRecovery", ["-r", "--restore"])
+  .maybeOption("argumentsJson", ["-a", "--arguments"], clk.STRING)
+  .maybeArgument("action", clk.STRING)
+  .maybeArgument("stateFile", clk.STRING);
+
+async function read(stream: NodeJS.ReadStream): Promise<string> {
+  const chunks = [];
+  for await (const chunk of stream) {
+    chunks.push(chunk);
+  }
+  return Buffer.concat(chunks).toString("utf8");
+}
+
+reducerCli.action(async (x) => {
+  if (x.reducer.initBackup) {
+    console.log(JSON.stringify(await getBackupStartState()));
+    return;
+  } else if (x.reducer.initRecovery) {
+    console.log(JSON.stringify(await getRecoveryStartState()));
+    return;
+  }
+
+  const action = x.reducer.action;
+  if (!action) {
+    console.log("action required");
+    return;
+  }
+
+  let lastState: any;
+  if (x.reducer.stateFile) {
+    const s = fs.readFileSync(x.reducer.stateFile, { encoding: "utf-8" });
+    lastState = JSON.parse(s);
+  } else {
+    const s = await read(process.stdin);
+    lastState = JSON.parse(s);
+  }
+
+  let args: any;
+  if (x.reducer.argumentsJson) {
+    args = JSON.parse(x.reducer.argumentsJson);
+  } else {
+    args = {};
+  }
+
+  const nextState = await reduceAction(lastState, action, args);
+  console.log(JSON.stringify(nextState));
+});
+
+export function reducerCliMain() {
+  reducerCli.run();
+}
-- 
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