Initial import with modified Dockerfile for env-based config generation

internal/event/mention.go

@@ -0,0 +1,86 @@
+package event
+
+import (
+	"regexp"
+	"strings"
+)
+
+// mentionRegex matches @username patterns
+// Supports alphanumeric characters, underscores, and hyphens
+var mentionRegex = regexp.MustCompile(`@([a-zA-Z0-9_-]+)`)
+
+// ExtractMentions extracts all @mentioned usernames from text
+func ExtractMentions(text string) []string {
+	if text == "" {
+		return nil
+	}
+
+	matches := mentionRegex.FindAllStringSubmatch(text, -1)
+	if len(matches) == 0 {
+		return nil
+	}
+
+	// Deduplicate mentions
+	seen := make(map[string]bool)
+	var usernames []string
+
+	for _, match := range matches {
+		if len(match) < 2 {
+			continue
+		}
+		username := strings.ToLower(match[1])
+
+		// Skip common false positives
+		if isCommonFalsePositive(username) {
+			continue
+		}
+
+		if !seen[username] {
+			seen[username] = true
+			usernames = append(usernames, username)
+		}
+	}
+
+	return usernames
+}
+
+// ReplaceMentionsWithSlackIDs replaces @username with <@SLACK_ID> format
+func ReplaceMentionsWithSlackIDs(text string, usernameToSlackID map[string]string) string {
+	if text == "" || len(usernameToSlackID) == 0 {
+		return text
+	}
+
+	result := mentionRegex.ReplaceAllStringFunc(text, func(match string) string {
+		username := strings.ToLower(strings.TrimPrefix(match, "@"))
+		if slackID, ok := usernameToSlackID[username]; ok {
+			return "<@" + slackID + ">"
+		}
+		return match // Keep original if no mapping found
+	})
+
+	return result
+}
+
+// isCommonFalsePositive checks if a mention is likely not a real username
+func isCommonFalsePositive(username string) bool {
+	// Common patterns that look like mentions but aren't
+	falsePositives := map[string]bool{
+		"param":      true,
+		"returns":    true,
+		"throws":     true,
+		"deprecated": true,
+		"see":        true,
+		"link":       true,
+		"code":       true,
+		"example":    true,
+		"todo":       true,
+		"fixme":      true,
+		"note":       true,
+		"warning":    true,
+		"author":     true,
+		"version":    true,
+		"since":      true,
+	}
+
+	return falsePositives[username]
+}