1 files changed, 79 insertions, 0 deletions
diff --git a/pkg/types/comment_type.go b/pkg/types/comment_type.go
new file mode 100644
index 0000000..8aed475
--- /dev/null
+++ b/pkg/types/comment_type.go
@@ -0,0 +1,79 @@
+package types
+
+import (
+	"database/sql/driver"
+	"encoding"
+	"encoding/json"
+	"github.com/icinga/icingadb/internal"
+	"github.com/pkg/errors"
+	"strconv"
+)
+
+// CommentType specifies a comment's origin's kind.
+type CommentType uint8
+
+// UnmarshalJSON implements the json.Unmarshaler interface.
+func (ct *CommentType) UnmarshalJSON(data []byte) error {
+	var i uint8
+	if err := internal.UnmarshalJSON(data, &i); err != nil {
+		return err
+	}
+
+	c := CommentType(i)
+	if _, ok := commentTypes[c]; !ok {
+		return badCommentType(data)
+	}
+
+	*ct = c
+	return nil
+}
+
+// UnmarshalText implements the encoding.TextUnmarshaler interface.
+func (ct *CommentType) UnmarshalText(text []byte) error {
+	s := string(text)
+
+	i, err := strconv.ParseUint(s, 10, 64)
+	if err != nil {
+		return internal.CantParseUint64(err, s)
+	}
+
+	c := CommentType(i)
+	if uint64(c) != i {
+		// Truncated due to above cast, obviously too high
+		return badCommentType(s)
+	}
+
+	if _, ok := commentTypes[c]; !ok {
+		return badCommentType(s)
+	}
+
+	*ct = c
+	return nil
+}
+
+// Value implements the driver.Valuer interface.
+func (ct CommentType) Value() (driver.Value, error) {
+	if v, ok := commentTypes[ct]; ok {
+		return v, nil
+	} else {
+		return nil, badCommentType(ct)
+	}
+}
+
+// badCommentType returns an error about a syntactically, but not semantically valid CommentType.
+func badCommentType(t interface{}) error {
+	return errors.Errorf("bad comment type: %#v", t)
+}
+
+// commentTypes maps all valid CommentType values to their SQL representation.
+var commentTypes = map[CommentType]string{
+	1: "comment",
+	4: "ack",
+}
+
+// Assert interface compliance.
+var (
+	_ json.Unmarshaler         = (*CommentType)(nil)
+	_ encoding.TextUnmarshaler = (*CommentType)(nil)
+	_ driver.Valuer            = CommentType(0)
+)