WTF-986 User-definable DigitalOcean columns (#1001)

* WTF-986 Wrap the DigitalOcean droplet in our own droplet

This gives us something to build off while still providing the
underlying functionality of the original droplet instance.

Signed-off-by: Chris Cummer <chriscummer@me.com>

* WTF-986 Dynamically display droplet attributes based on defined column names

Signed-off-by: Chris Cummer <chriscummer@me.com>

* WTF-986 Read DigitalOcean column configuration from settings

Signed-off-by: Chris Cummer <chriscummer@me.com>

* WTF-986 Extract the reflection bits into a Reflective package

Signed-off-by: Chris Cummer <chriscummer@me.com>

utils/reflective.go

@@ -0,0 +1,25 @@
+package utils
+
+import (
+	"fmt"
+	"reflect"
+)
+
+// Reflective is a convenience wrapper for objects that makes it possible to
+// extract property values from the object by property name
+type Reflective struct{}
+
+// StringValueForProperty returns a string value for the given property
+// If the property doesn't exist, it returns an error
+func (ref *Reflective) StringValueForProperty(propName string) (string, error) {
+	v := reflect.ValueOf(ref)
+	refVal := reflect.Indirect(v).FieldByName(propName)
+
+	if !refVal.IsValid() {
+		return "", fmt.Errorf("invalid property name: %s", propName)
+	}
+
+	strVal := fmt.Sprintf("%v", refVal)
+
+	return strVal, nil
+}

utils/text.go

@@ -77,12 +77,13 @@ func Truncate(src string, maxLen int, withEllipse bool) string {
 	return src
 }
 
-// Formats number as string with 1000 delimiters and, if necessary, rounds it to 2 decimals
+// PrettyNumber formats number as string with 1000 delimiters and, if necessary, rounds it to 2 decimals
 func PrettyNumber(number float64) string {
 	p := message.NewPrinter(language.English)
+
 	if number == math.Trunc(number) {
 		return p.Sprintf("%.0f", number)
-	} else {
-		return p.Sprintf("%.2f", number)
 	}
+
+	return p.Sprintf("%.2f", number)
 }