2 files changed, 172 insertions, 0 deletions
diff --git a/utils/format/date.go b/utils/format/date.go
new file mode 100644
index 0000000..8ef95cb
--- /dev/null
+++ b/utils/format/date.go
@@ -0,0 +1,99 @@
+package format
+
+import (
+	"html"
+	"lain/types"
+	"time"
+)
+
+func FormatEmailDate(date time.Time, dateFormat types.DateFormat, timeFormat types.TimeFormat, prettyDates bool, timezone string) string {
+	loc, err := time.LoadLocation(timezone)
+	if err != nil {
+		loc = time.UTC
+	}
+
+	date = date.In(loc)
+	now := time.Now().In(loc)
+
+	if prettyDates {
+		return formatPrettyDate(date, now, timeFormat)
+	}
+
+	return formatFullDate(date, dateFormat, timeFormat)
+}
+
+func formatPrettyDate(date, now time.Time, timeFormat types.TimeFormat) string {
+	diff := now.Sub(date)
+
+	// Today - show time only
+	if date.Year() == now.Year() && date.YearDay() == now.YearDay() {
+		return formatTime(date, timeFormat)
+	}
+
+	// Yesterday
+	yesterday := now.AddDate(0, 0, -1)
+	if date.Year() == yesterday.Year() && date.YearDay() == yesterday.YearDay() {
+		return "Yesterday"
+	}
+
+	// This week - show day name and time
+	if diff.Hours() < 168 { // 7 days
+		dayName := date.Format("Mon")
+		timeStr := formatTime(date, timeFormat)
+		return dayName + " " + timeStr
+	}
+
+	// This year - show month and day
+	if date.Year() == now.Year() {
+		return date.Format("Jan 2")
+	}
+
+	// Older - show full date
+	return date.Format("Jan 2, 2006")
+}
+
+func formatFullDate(date time.Time, dateFormat types.DateFormat, timeFormat types.TimeFormat) string {
+	dateStr := formatDate(date, dateFormat)
+	timeStr := formatTime(date, timeFormat)
+	return dateStr + " " + timeStr
+}
+
+func formatDate(date time.Time, dateFormat types.DateFormat) string {
+	switch dateFormat {
+	case types.YearMonthDayDashed:
+		return date.Format("2006-01-02")
+	case types.YearMonthDaySlashed:
+		return date.Format("2006/01/02")
+	case types.YearMonthDayDotted:
+		return date.Format("2006.01.02")
+	case types.DayMonthYearDashed:
+		return date.Format("02-01-2006")
+	case types.DayMonthYearSlashed:
+		return date.Format("02/01/2006")
+	case types.DayMonthYearDotted:
+		return date.Format("02.01.2006")
+	case types.DayMonthYearDottedShort:
+		return date.Format("2.1.06")
+	default:
+		return date.Format("2006-01-02")
+	}
+}
+
+func formatTime(date time.Time, timeFormat types.TimeFormat) string {
+	switch timeFormat {
+	case types.ShortHoursAndMinutes24Hours:
+		return date.Format("15:4")
+	case types.FullHoursAndMinutes24Hours:
+		return date.Format("15:04")
+	case types.ShortHoursAndMinutes12Hours:
+		return date.Format("3:4 PM")
+	case types.FullHoursAndMinutes12Hours:
+		return date.Format("03:04 PM")
+	default:
+		return date.Format("15:04")
+	}
+}
+
+func DecodeHTML(text string) string {
+	return html.UnescapeString(text)
+}
diff --git a/utils/format/html.go b/utils/format/html.go
new file mode 100644
index 0000000..36e2425
--- /dev/null
+++ b/utils/format/html.go
@@ -0,0 +1,73 @@
+package format
+
+import (
+	"regexp"
+	"strings"
+)
+
+func GenerateSnippet(bodyText, bodyHTML string) string {
+	text := bodyText
+	if text == "" && bodyHTML != "" {
+		text = StripHTML(bodyHTML)
+	}
+
+	text = strings.TrimSpace(text)
+	if len(text) > 150 {
+		text = text[:150] + "..."
+	}
+
+	return text
+}
+
+func StripHTML(html string) string {
+	text := html
+
+	styleRegex := regexp.MustCompile(`(?i)<style[^>]*>[\s\S]*?</style>`)
+	text = styleRegex.ReplaceAllString(text, "")
+
+	scriptRegex := regexp.MustCompile(`(?i)<script[^>]*>[\s\S]*?</script>`)
+	text = scriptRegex.ReplaceAllString(text, "")
+
+	headRegex := regexp.MustCompile(`(?i)<head[^>]*>[\s\S]*?</head>`)
+	text = headRegex.ReplaceAllString(text, "")
+
+	text = strings.ReplaceAll(text, "<br>", "\n")
+	text = strings.ReplaceAll(text, "<br/>", "\n")
+	text = strings.ReplaceAll(text, "<br />", "\n")
+	text = strings.ReplaceAll(text, "</p>", "\n\n")
+	text = strings.ReplaceAll(text, "</div>", "\n")
+	text = strings.ReplaceAll(text, "</tr>", "\n")
+	text = strings.ReplaceAll(text, "</h1>", "\n")
+	text = strings.ReplaceAll(text, "</h2>", "\n")
+	text = strings.ReplaceAll(text, "</h3>", "\n")
+	text = strings.ReplaceAll(text, "</li>", "\n")
+
+	inTag := false
+	var result strings.Builder
+	for _, char := range text {
+		if char == '<' {
+			inTag = true
+			continue
+		}
+		if char == '>' {
+			inTag = false
+			continue
+		}
+		if !inTag {
+			result.WriteRune(char)
+		}
+	}
+
+	cleanText := result.String()
+
+	lines := strings.Split(cleanText, "\n")
+	var cleanLines []string
+	for _, line := range lines {
+		line = strings.TrimSpace(line)
+		if line != "" {
+			cleanLines = append(cleanLines, line)
+		}
+	}
+
+	return strings.TrimSpace(strings.Join(cleanLines, " "))
+}