support passing functions to the backend as parameters

src/public/javascripts/server.js

@@ -31,12 +31,23 @@ const server = (function() {
         return await call('DELETE', url);
     }
 
+    function prepareParams(params) {
+        return params.map(p => {
+            if (typeof p === "function") {
+                return "!@#Function: " + p.toString();
+            }
+            else {
+                return p;
+            }
+        });
+    }
+
     async function exec(params, script) {
         if (typeof script === "function") {
             script = script.toString();
         }
 
-        const ret = await post('script/exec', { script: script, params: params });
+        const ret = await post('script/exec', { script: script, params: prepareParams(params) });
 
         return ret.executionResult;
     }

src/scripts/weight.html

@@ -117,16 +117,11 @@
                 return data;
             });
 
-            const colors = data.map(row => row.comment ? 'darkred' : 'red');
-
             const datasets = [{
                 label: "Weight",
                 backgroundColor: 'red',
                 borderColor: 'red',
                 data: data.map(row => row.weight),
-                // this is to emphasize points with color
-                pointBackgroundColor: colors,
-                pointBorderColor: colors,
                 fill: false
             }];
 

src/services/script.js

@@ -19,7 +19,14 @@ async function executeScript(dataKey, script, params) {
 }
 
 function getParams(params) {
-    return params.map(p => JSON.stringify(p)).join(",");
+    return params.map(p => {
+        if (typeof p === "string" && p.startsWith("!@#Function: ")) {
+            return p.substr(13);
+        }
+        else {
+            return JSON.stringify(p);
+        }
+    }).join(",");
 }
 
 module.exports = {