Update threads to use model/store (#97)

threads/handler/read_thread.go

@@ -0,0 +1,46 @@
+package handler
+
+import (
+	"context"
+
+	"github.com/micro/micro/v3/service/auth"
+	"github.com/micro/micro/v3/service/errors"
+	"github.com/micro/micro/v3/service/logger"
+	"github.com/micro/services/pkg/model"
+	pb "github.com/micro/services/threads/proto"
+)
+
+// Read a thread using its ID, can filter using group ID if provided
+func (s *Threads) ReadThread(ctx context.Context, req *pb.ReadThreadRequest, rsp *pb.ReadThreadResponse) error {
+	_, ok := auth.AccountFromContext(ctx)
+	if !ok {
+		errors.Unauthorized("UNAUTHORIZED", "Unauthorized")
+	}
+	// validate the request
+	if len(req.Id) == 0 {
+		return ErrMissingID
+	}
+
+	// construct the query
+	thread := &Thread{ID: req.Id}
+
+	var err error
+
+	if len(req.GroupId) > 0 {
+		thread.GroupID = req.GroupId
+		err = model.ReadIndex(ctx, thread)
+	} else {
+		err = model.Read(ctx, thread)
+	}
+
+	if err == model.ErrNotFound {
+		return ErrNotFound
+	} else if err != nil {
+		logger.Errorf("Error reading thread: %v", err)
+		return errors.InternalServerError("DATABASE_ERROR", "Error connecting to database")
+	}
+
+	// serialize the response
+	rsp.Thread = thread.Serialize()
+	return nil
+}