Generalize store quering functions

client/components/parameter.js

@@ -0,0 +1,30 @@
+"use strict";
+
+import m from "mithril";
+import * as components from "../components";
+
+const component = {
+  view: vnode => {
+    const param = vnode.attrs.device[vnode.attrs.parameter];
+    if (!param || !param.value) return m("span.na", "N/A");
+    let value = param.value[0];
+    if (param.value[1] === "xsd:dateTime")
+      value = new Date(value).toISOString();
+
+    let meta;
+    if (vnode.attrs.meta) {
+      const metaAttrs = Object.assign(
+        { device: vnode.attrs.device, parameter: vnode.attrs.parameter },
+        vnode.attrs.meta
+      );
+      meta = m("span", [
+        " (",
+        m(components.get(metaAttrs.type), metaAttrs),
+        ")"
+      ]);
+    }
+    return [m("span", { title: param.valueTimestamp }, value), meta];
+  }
+};
+
+export default component;