1 files changed, 39 insertions, 0 deletions
diff --git a/backend/file.js b/backend/file.js
new file mode 100644
index 0000000..b750921
--- /dev/null
+++ b/backend/file.js
@@ -0,0 +1,39 @@
+#!/usr/bin/node
+
+const R = require('ramda'),
+  Future = require('fluture'),
+  fs = require('fs'),
+  fsPath = require('fs-path');
+
+function loadFPayloads(config) {
+  return R.curry((file) =>
+    Future.node((cb) => fs.readFile(file, 'utf8', cb))
+          .chain(Future.encase(JSON.parse))
+  );
+}
+
+function saveFPayloads(config) {
+  return R.curry((file, data) =>
+    Future.node((cb) => fsPath.writeFile(file, JSON.stringify(data), cb))
+    .map(() => data)
+  );
+}
+
+function saveFPayloadsTimestamped(config) {
+  return R.curry((timestamp, data) =>
+    saveFPayloads(config)(config.pattern(timestamp), data)
+  );
+}
+
+function loadFPayloadsTimestamped(config) {
+  return R.curry((timestamp) =>
+    loadFPayloads(config)(config.pattern(timestamp))
+  );
+}
+
+module.exports = {
+  loadFPayloads,
+  loadFPayloadsTimestamped,
+  saveFPayloads,
+  saveFPayloadsTimestamped,
+};