initial timestamp package

2 files changed, 64 insertions, 0 deletions

diff --git a/internal/timestamp/timestamp.go b/internal/timestamp/timestamp.go
new file mode 100644
index 0000000..8c048df
--- /dev/null
+++ b/internal/timestamp/timestamp.go
@@ -0,0 +1,41 @@
+package timestamp
+
+import (
+	"strings"
+	"time"
+)
+
+const (
+	Format = "20060102-150405"
+)
+
+func Now() string {
+	return time.Now().Format(Format)
+}
+
+func NowTime() time.Time {
+	t, err := Parse(Now())
+	if err != nil {
+		panic(err)
+	}
+	return t
+}
+
+func Parse(timeStr string) (time.Time, error) {
+	return time.Parse(Format, timeStr)
+}
+func OldestValidTime() time.Time {
+	// The time this code was written a:round, actually.
+	oldestValidTime, err := Parse("20240912-102800")
+	if err != nil {
+		// Never expected
+		panic(err)
+	}
+	return oldestValidTime
+}
+
+func UpdateInFilename(filename string, rIndex int) string {
+	parts := strings.Split(filename, ".")
+	parts[len(parts)-rIndex] = Now()
+	return strings.Join(parts, "-")
+}
diff --git a/internal/timestamp/timestamp_test.go b/internal/timestamp/timestamp_test.go
new file mode 100644
index 0000000..27d0fd4
--- /dev/null
+++ b/internal/timestamp/timestamp_test.go
@@ -0,0 +1,23 @@
+package timestamp
+
+import (
+	"strings"
+	"testing"
+	"time"
+)
+
+func TestUpdateInFilename(t *testing.T) {
+	var (
+		filePath        = "gosdir/db/platforms/mastodon/1728240487.txt.20241009-232530.queued"
+		nowTime         = time.Now()
+		updatedFilePath = UpdateInFilename(filePath, -2)
+		parts           = strings.Split(updatedFilePath, ".")
+	)
+
+	updatedTime, err := Parse(parts[len(parts)-2])
+	if err != nil {
+		t.Error(err)
+	}
+
+	t.Log(filePath, updatedFilePath, nowTime.Sub(updatedTime))
+}