Generalize store quering functions

server/config.js

@@ -1,6 +1,65 @@
 "use strict";
 
 const filterParser = require("../common/filter-parser.js");
+const Filter = require("../common/filter.js");
 
-exports.PORT = 3000;
-exports.GENIEACS_NBI = "http://127.0.0.1:7557/";
+const configFile = require("../config.json");
+
+const cache = {};
+
+function parse(name, value) {
+  if (/^ui\.overview\.charts\.[^.]+\.slices\.[^.]+\.filter$/.test(name))
+    return new Filter(value);
+
+  return value;
+}
+
+function get(name) {
+  let v = cache[name];
+  if (v === undefined) {
+    v = configFile[name];
+    if (v != null) {
+      v = parse(name, v);
+    } else {
+      const prefix = `${name}.`;
+      for (let k of Object.keys(configFile))
+        if (k.startsWith(prefix)) {
+          v = v || {};
+          let ar = k.slice(prefix.length).split(".");
+          let ref = v;
+          for (let a of ar.slice(0, -1)) ref = ref[a] = ref[a] || {};
+          ref[ar[ar.length - 1]] = parse(k, configFile[k]);
+        }
+    }
+    if (v) cache[name] = v;
+    else cache[name] = null;
+  }
+
+  return v;
+}
+
+function getClientConfig() {
+  const regex = [
+    /^ui\.pageSize$/,
+    /^ui\.filters\.[^.]+\.label$/,
+    /^ui\.filters\.[^.]+\.parameter$/,
+    /^ui\.filters\.[^.]+\.type$/,
+    /^ui\.index\./,
+    /^ui\.overview\.groups\./,
+    /^ui\.overview\.charts\./,
+    /^ui\.device/
+  ];
+
+  const clientConfig = {};
+  for (let [k, v] of Object.entries(configFile))
+    for (let r of regex)
+      if (r.test(k)) {
+        clientConfig[k] = v;
+        break;
+      }
+
+  return clientConfig;
+}
+
+exports.get = get;
+exports.getClientConfig = getClientConfig;