[refactor] template handling

api/utils.go

@@ -1,6 +1,7 @@
 package api
 
 import (
+	"errors"
 	"fmt"
 	"math"
 
@@ -95,3 +96,18 @@ func getSVGGraphData(inputData []database.GetDailyReadStatsRow, svgWidth int, sv
 
 	return graph.GetSVGGraphData(intData, svgWidth, svgHeight)
 }
+
+func dict(values ...interface{}) (map[string]interface{}, error) {
+	if len(values)%2 != 0 {
+		return nil, errors.New("invalid dict call")
+	}
+	dict := make(map[string]interface{}, len(values)/2)
+	for i := 0; i < len(values); i += 2 {
+		key, ok := values[i].(string)
+		if !ok {
+			return nil, errors.New("dict keys must be strings")
+		}
+		dict[key] = values[i+1]
+	}
+	return dict, nil
+}