add asset trends in statistics & analysis (#314)

pkg/utils/datetimes.go

@@ -155,6 +155,17 @@ func FormatUnixTimeToNumericYearMonth(unixTime int64, timezone *time.Location) i
 	return int32(t.Year())*100 + int32(t.Month())
 }
 
+// FormatUnixTimeToNumericYearMonthDay returns numeric year, month and day of specified unix time
+func FormatUnixTimeToNumericYearMonthDay(unixTime int64, timezone *time.Location) int32 {
+	t := parseFromUnixTime(unixTime)
+
+	if timezone != nil {
+		t = t.In(timezone)
+	}
+
+	return int32(t.Year())*10000 + int32(t.Month())*100 + int32(t.Day())
+}
+
 // FormatUnixTimeToNumericLocalDateTime returns numeric year, month, day, hour, minute and second of specified unix time
 func FormatUnixTimeToNumericLocalDateTime(unixTime int64, timezone *time.Location) int64 {
 	t := parseFromUnixTime(unixTime)

pkg/utils/datetimes_test.go

@@ -133,6 +133,20 @@ func TestFormatUnixTimeToNumericYearMonth(t *testing.T) {
 	assert.Equal(t, expectedValue, actualValue)
 }
 
+func TestFormatUnixTimeToNumericYearMonthDay(t *testing.T) {
+	unixTime := int64(1617228083)
+	utcTimezone := time.FixedZone("Test Timezone", 0)      // UTC
+	utc8Timezone := time.FixedZone("Test Timezone", 28800) // UTC+8
+
+	expectedValue := int32(20210331)
+	actualValue := FormatUnixTimeToNumericYearMonthDay(unixTime, utcTimezone)
+	assert.Equal(t, expectedValue, actualValue)
+
+	expectedValue = int32(20210401)
+	actualValue = FormatUnixTimeToNumericYearMonthDay(unixTime, utc8Timezone)
+	assert.Equal(t, expectedValue, actualValue)
+}
+
 func TestFormatUnixTimeToNumericLocalDateTime(t *testing.T) {
 	unixTime := int64(1617228083)
 	utcTimezone := time.FixedZone("Test Timezone", 0)      // UTC