1 files changed, 58 insertions, 0 deletions
diff --git a/util.go b/util.go
new file mode 100644
index 0000000..c811a1e
--- /dev/null
+++ b/util.go
@@ -0,0 +1,58 @@
+package main
+
+import (
+	"fmt"
+	"unicode"
+
+	log "github.com/sirupsen/logrus"
+
+	. "git.deuxfleurs.fr/Deuxfleurs/easybridge/connector"
+)
+
+const EASYBRIDGE_SYSTEM_PROTOCOL string = "✯◡✯"
+
+func ezbrMxId() string {
+	return fmt.Sprintf("@%s:%s", registration.SenderLocalpart, config.MatrixDomain)
+}
+
+func ezbrSystemRoom(user_mx_id string) (string, error) {
+	return dbGetMxPmRoom(EASYBRIDGE_SYSTEM_PROTOCOL, UserID("Easybridge"), ezbrMxId(), user_mx_id, "easybridge")
+}
+
+func ezbrSystemSend(user_mx_id string, msg string) {
+	mx_room_id, err := ezbrSystemRoom(user_mx_id)
+	if err == nil {
+		err = mx.SendMessageAs(mx_room_id, "m.text", msg, ezbrMxId())
+	}
+	if err != nil {
+		log.Warnf("(%s) %s", user_mx_id, msg)
+	}
+}
+
+func ezbrSystemSendf(user_mx_id string, format string, args ...interface{}) {
+	ezbrSystemSend(user_mx_id, fmt.Sprintf(format, args...))
+}
+
+// ----
+
+func roomAlias(protocol string, id RoomID) string {
+	return fmt.Sprintf("_ezbr__%s__%s", safeStringForId(string(id)), protocol)
+}
+
+func userMxId(protocol string, id UserID) string {
+	return fmt.Sprintf("_ezbr__%s__%s", safeStringForId(string(id)), protocol)
+}
+
+func safeStringForId(in string) string {
+	id2 := ""
+	for _, c := range in {
+		if c == '@' {
+			id2 += "__"
+		} else if c == ':' {
+			id2 += "_"
+		} else if unicode.IsDigit(c) || unicode.IsLetter(c) {
+			id2 += string(c)
+		}
+	}
+	return id2
+}