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pkg/types/consumer_cursor.go

@@ -0,0 +1,50 @@
+package types
+
+import "fmt"
+
+type ConsumerCursor string
+
+var (
+	ConsumerCursorLastConsumed  ConsumerCursor = "last-consumed"
+	ConsumerCursorFirstStream   ConsumerCursor = "first-stream"
+	ConsumerCursorCurrentStream ConsumerCursor = "current-stream"
+)
+
+func (c ConsumerCursor) String() string {
+	return string(c)
+}
+
+func (c ConsumerCursor) IsValid() bool {
+	return c == ConsumerCursorLastConsumed || c == ConsumerCursorFirstStream || c == ConsumerCursorCurrentStream
+}
+
+func (c ConsumerCursor) Equal(other ConsumerCursor) bool {
+	return c == other
+}
+
+func (c ConsumerCursor) IsLastConsumed() bool {
+	return c == ConsumerCursorLastConsumed
+}
+
+func (c ConsumerCursor) IsFirstStream() bool {
+	return c == ConsumerCursorFirstStream
+}
+
+func (c ConsumerCursor) IsCurrentStream() bool {
+	return c == ConsumerCursorCurrentStream
+}
+
+func (c *ConsumerCursor) Set(value string) error {
+	switch value {
+	case ConsumerCursorLastConsumed.String(), "":
+		*c = ConsumerCursorLastConsumed
+	case ConsumerCursorFirstStream.String():
+		*c = ConsumerCursorFirstStream
+	case ConsumerCursorCurrentStream.String():
+		*c = ConsumerCursorCurrentStream
+	default:
+		return fmt.Errorf("invalid cursor value: %s", value)
+	}
+
+	return nil
+}

pkg/types/err_map.go

@@ -0,0 +1,18 @@
+package types
+
+type ErrMap map[string]error
+
+func (ErrMap ErrMap) ToStringMap() map[string]string {
+	if len(ErrMap) == 0 {
+		return nil
+	}
+
+	stringMap := make(map[string]string)
+	for key, err := range ErrMap {
+		if err != nil {
+			stringMap[key] = err.Error()
+		}
+	}
+
+	return stringMap
+}

pkg/types/errors.go

@@ -0,0 +1,7 @@
+package types
+
+import "errors"
+
+var (
+	ErrInternal = errors.New("internal error")
+)

pkg/types/generator_cursor.go

@@ -0,0 +1,43 @@
+package types
+
+import "fmt"
+
+type GeneratorCursor string
+
+var (
+	GeneratorCursorLastGenerated GeneratorCursor = "last-generated"
+	GeneratorCursorFirstPost     GeneratorCursor = "first-post"
+)
+
+func (c GeneratorCursor) String() string {
+	return string(c)
+}
+
+func (c GeneratorCursor) IsValid() bool {
+	return c == GeneratorCursorLastGenerated || c == GeneratorCursorFirstPost
+}
+
+func (c GeneratorCursor) Equal(other GeneratorCursor) bool {
+	return c == other
+}
+
+func (c GeneratorCursor) IsLastGenerated() bool {
+	return c == GeneratorCursorLastGenerated
+}
+
+func (c GeneratorCursor) IsFirstPost() bool {
+	return c == GeneratorCursorFirstPost
+}
+
+func (c *GeneratorCursor) Set(value string) error {
+	switch value {
+	case GeneratorCursorLastGenerated.String(), "":
+		*c = GeneratorCursorLastGenerated
+	case GeneratorCursorFirstPost.String():
+		*c = GeneratorCursorFirstPost
+	default:
+		return fmt.Errorf("invalid cursor value: %s", value)
+	}
+
+	return nil
+}