Rewrite dimensions middleware to ES6

Signed-off-by: João Victor Tozatti Risso <jvtr12@inf.ufpr.br>

src/libs/middlewares/dimensions.js

@@ -13,36 +13,40 @@
 */
 
 function intersect(a, b) {
-    var t
-    if (b.length > a.length) t = b, b = a, a = t
-    return a.filter(function (e) {
-        if (b.indexOf(e) !== -1) return true
-    })
+    let t;
+    if (b.length > a.length) {
+        t = b; b = a; a = t;
+    }
+    return a.filter((e) => b.indexOf(e) !== -1);
 }
 
 function dimensions(dims) {
-    return function(req, res, next) {
-        req.dims = {}
-        if(req.query.dims) {
-            var params = req.query.dims.split(",")
-            var dimObj = {}
-            for(var i=0; i<params.length; ++i) {
-                var kv = params[i].split(":")
-                dimObj[kv[0]] = (typeof kv[1] === 'undefined') ? null : kv[1]
+    return (req, res, next) => {
+        req.dims = {};
+        if (req.query.dims) {
+            const params = req.query.dims.split(',');
+            const dimObj = {};
+            for (const param of params) {
+                const kv = param.split(':');
+                dimObj[kv[0]] = (typeof kv[1] === 'undefined') ? null : kv[1];
             }
+            // for(let i=0; i<params.length; ++i) {
+            //     let kv = params[i].split(':');
+            //     dimObj[kv[0]] = (typeof kv[1] === 'undefined') ? null : kv[1];
+            // }
+
             // If the dims array exists and is not empty
-            if(typeof dims !== 'undefined' && dims.length > 0) {
-                var intersection = intersect(dims, Object.keys(dimObj))
-                for(var i=0; i<intersection.length; ++i) {
-                    req.dims[intersection[i]] = dimObj[intersection[i]]
+            if (typeof dims !== 'undefined' && dims.length > 0) {
+                const intersection = intersect(dims, Object.keys(dimObj));
+                for (let i = 0; i < intersection.length; ++i) {
+                    req.dims[intersection[i]] = dimObj[intersection[i]];
                 }
             } else {
-                req.dims = dimObj
+                req.dims = dimObj;
             }
         }
-        console.log(req.dims)
-        next()
-    }
+        next();
+    };
 }
 
-module.exports = dimensions
+module.exports = dimensions;