1 files changed, 98 insertions, 0 deletions
diff --git a/src/shared/settings/values.js b/src/shared/settings/values.js
new file mode 100644
index 0000000..4e55fa0
--- /dev/null
+++ b/src/shared/settings/values.js
@@ -0,0 +1,98 @@
+const operationFromFormName = (name) => {
+  let [type, argStr] = name.split('?');
+  let args = {};
+  if (argStr) {
+    args = JSON.parse(argStr);
+  }
+  return Object.assign({ type }, args);
+};
+
+const operationToFormName = (op) => {
+  let type = op.type;
+  let args = Object.assign({}, op);
+  delete args.type;
+
+  if (Object.keys(args).length === 0) {
+    return type;
+  }
+  return op.type + '?' + JSON.stringify(args);
+};
+
+const valueFromJson = (json) => {
+  return JSON.parse(json);
+};
+
+const valueFromForm = (form) => {
+  let keymaps = undefined;
+  if (form.keymaps) {
+    keymaps = {};
+    for (let name of Object.keys(form.keymaps)) {
+      let keys = form.keymaps[name];
+      keymaps[keys] = operationFromFormName(name);
+    }
+  }
+
+  let search = undefined;
+  if (form.search) {
+    search = { default: form.search.default };
+
+    if (form.search.engines) {
+      search.engines = {};
+      for (let [name, url] of form.search.engines) {
+        search.engines[name] = url;
+      }
+    }
+  }
+
+  let blacklist = form.blacklist;
+
+  return { keymaps, search, blacklist };
+};
+
+const jsonFromValue = (value) => {
+  return JSON.stringify(value, undefined, 2);
+};
+
+const formFromValue = (value, allowedOps) => {
+  let keymaps = undefined;
+
+  if (value.keymaps) {
+    let allowedSet = new Set(allowedOps);
+
+    keymaps = {};
+    for (let keys of Object.keys(value.keymaps)) {
+      let op = operationToFormName(value.keymaps[keys]);
+      if (allowedSet.has(op)) {
+        keymaps[op] = keys;
+      }
+    }
+  }
+
+  let search = undefined;
+  if (value.search) {
+    search = { default: value.search.default };
+    if (value.search.engines) {
+      search.engines = Object.keys(value.search.engines).map((name) => {
+        return [name, value.search.engines[name]];
+      });
+    }
+  }
+
+  let blacklist = value.blacklist;
+
+  return { keymaps, search, blacklist };
+};
+
+const jsonFromForm = (form) => {
+  return jsonFromValue(valueFromForm(form));
+};
+
+const formFromJson = (json, allowedOps) => {
+  let value = valueFromJson(json);
+  return formFromValue(value, allowedOps);
+};
+
+export {
+  valueFromJson, valueFromForm, jsonFromValue, formFromValue,
+  jsonFromForm, formFromJson
+};