feat: Completed functionality for generating a period timeline

msp/timeline.go

@@ -0,0 +1,31 @@
+package msp
+
+import "fmt"
+
+// Outputs a formatted timeline of periods
+func GenerateTimeline(periods ...Period) (out []string) {
+	if len(periods) == 0 {
+		out = []string{}
+		return out
+	}
+	periodsByID := make(map[string]Period)
+	ids := FlattenPeriods(periods...)
+	for _, val := range periods {
+		id := val.GetIdentifier()
+		periodsByID[id] = val
+	}
+	start := periodsByID[ids[0]].GetStartTime()
+	for _, val := range ids {
+		next, err := GetNextChangeOver(start, periods...)
+		if err == nil {
+			if next.Equal(periodsByID[val].GetStartTime()) {
+				start = periodsByID[val].GetStartTime()
+				next = periodsByID[val].GetEndTime()
+			}
+			frame := fmt.Sprintf("%s\t%s\t%s\n", val, start, next)
+			out = append(out, frame)
+			start = next
+		}
+	}
+	return out
+}