add project start time.

api/project.go

@@ -47,6 +47,9 @@ func Project(g *gin.RouterGroup, db database.Database) {
 		if project.EndTime != nil && project.EndTime.Before(time.Now()) {
 			return nil, slerrors.BadRequest("Project end time must be later than current time.")
 		}
+		if project.StartTime != nil && (project.EndTime == nil || !project.StartTime.Before(*project.EndTime)) {
+			return nil, slerrors.BadRequest("Project start time must be before end time.")
+		}
 
 		project.ID = generate.ProjectID()
 		project.UserID = auth.UserID(c)
@@ -80,6 +83,11 @@ func Project(g *gin.RouterGroup, db database.Database) {
 		}
 
 		project.Update(update)
+
+		if project.StartTime != nil && (project.EndTime == nil || !project.StartTime.Before(*project.EndTime)) {
+			return nil, slerrors.BadRequest("Project start time must be before end time.")
+		}
+
 		err = db.Projects().Update(c.Request.Context(), project.Project)
 		if err != nil {
 			return nil, err