From 9698d90308e34702f3212a386b1b7087fef3f9d4 Mon Sep 17 00:00:00 2001
From: Ethan Holz <iplaybassx2@gmail.com>
Date: Thu, 13 Oct 2022 17:02:55 -0500
Subject: [PATCH] feat: Initial changes to handline generating a timeline

---
 msp/changeover.go | 24 ++++++++++++++++++++++++
 1 file changed, 24 insertions(+)

diff --git a/msp/changeover.go b/msp/changeover.go
index 24a735a..50d2a8a 100644
--- a/msp/changeover.go
+++ b/msp/changeover.go
@@ -1,6 +1,7 @@
 package msp
 
 import (
+	"fmt"
 	"sort"
 	"time"
 )
@@ -58,3 +59,26 @@ func FlattenPeriods(periods ...Period) (ids []string) {
 	}
 	return
 }
+
+func GenerateTimeline(periods ...Period) (out []string) {
+	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
+}