Add apod package

1 files changed, 31 insertions, 0 deletions

diff --git a/apod/randomdate.go b/apod/randomdate.go
new file mode 100644
index 0000000..743b447
--- /dev/null
+++ b/apod/randomdate.go
@@ -0,0 +1,31 @@
+package apod
+
+import (
+	"math/rand"
+	"time"
+)
+
+// RandDate returns a random date between 1995-06-16 & today.
+func RandDate() string {
+	var (
+		min   int64
+		max   int64
+		sec   int64
+		delta int64
+		date  string
+	)
+	min = time.Date(1995, 6, 16, 0, 0, 0, 0, time.UTC).Unix()
+
+	// We are taking max from UTC but it could fail if the
+	// timezone on NASA APOD server is any different. They don't
+	// mention the timezone api server uses so we use UTC & the
+	// probability of this function failing because of this issue
+	// is very low.
+	max = time.Now().UTC().Unix()
+	delta = max - min
+
+	sec = rand.Int63n(delta) + min
+	date = time.Unix(sec, 0).Format("2006-01-02")
+
+	return date
+}