Streams (#47)

* Streams Service (WIP)

* Complete Streams Service

streams/handler/streams.go

@@ -0,0 +1,60 @@
+package handler
+
+import (
+	"time"
+
+	"github.com/micro/micro/v3/service/errors"
+	pb "github.com/micro/services/streams/proto"
+	"google.golang.org/protobuf/types/known/timestamppb"
+	"gorm.io/gorm"
+)
+
+var (
+	ErrMissingID              = errors.BadRequest("MISSING_ID", "Missing ID")
+	ErrMissingGroupID         = errors.BadRequest("MISSING_GROUP_ID", "Missing GroupID")
+	ErrMissingTopic           = errors.BadRequest("MISSING_TOPIC", "Missing Topic")
+	ErrMissingAuthorID        = errors.BadRequest("MISSING_AUTHOR_ID", "Missing Author ID")
+	ErrMissingText            = errors.BadRequest("MISSING_TEXT", "Missing text")
+	ErrMissingConversationID  = errors.BadRequest("MISSING_CONVERSATION_ID", "Missing Conversation ID")
+	ErrMissingConversationIDs = errors.BadRequest("MISSING_CONVERSATION_IDS", "One or more Conversation IDs are required")
+	ErrNotFound               = errors.NotFound("NOT_FOUND", "Conversation not found")
+)
+
+type Streams struct {
+	DB   *gorm.DB
+	Time func() time.Time
+}
+
+type Message struct {
+	ID             string
+	AuthorID       string
+	ConversationID string
+	Text           string
+	SentAt         time.Time
+}
+
+func (m *Message) Serialize() *pb.Message {
+	return &pb.Message{
+		Id:             m.ID,
+		AuthorId:       m.AuthorID,
+		ConversationId: m.ConversationID,
+		Text:           m.Text,
+		SentAt:         timestamppb.New(m.SentAt),
+	}
+}
+
+type Conversation struct {
+	ID        string
+	GroupID   string
+	Topic     string
+	CreatedAt time.Time
+}
+
+func (c *Conversation) Serialize() *pb.Conversation {
+	return &pb.Conversation{
+		Id:        c.ID,
+		GroupId:   c.GroupID,
+		Topic:     c.Topic,
+		CreatedAt: timestamppb.New(c.CreatedAt),
+	}
+}