handle organization address case insensitive, handling duplicate key …

…error on members invitation endpoint and api docs typos

api/docs.md

@@ -575,7 +575,7 @@ Only the following parameters can be changed. Every parameter is optional.
 
 * **Path** `/organizations/{address}/members`
 * **Method** `POST`
-* **Response**
+* **Request**
 ```json
 {
   "role": "admin",
@@ -602,7 +602,7 @@ Only the following parameters can be changed. Every parameter is optional.
 
 * **Path** `/organizations/{address}/members/accept`
 * **Method** `POST`
-* **Response**
+* **Request**
 ```json
 {
   "code": "a3f3b5",

api/organizations.go

@@ -274,6 +274,10 @@ func (a *API) inviteOrganizationMemberHandler(w http.ResponseWriter, r *http.Req
 		CurrentUserID:       user.ID,
 		Expiration:          time.Now().Add(InvitationExpiration),
 	}); err != nil {
+		if err == db.ErrAlreadyExists {
+			ErrDuplicateConflict.With("user is already invited to the organization").Write(w)
+			return
+		}
 		ErrGenericInternalServerError.Withf("could not create invitation: %v", err).Write(w)
 		return
 	}

db/organization_invites.go

@@ -46,6 +46,17 @@ func (ms *MongoStorage) CreateInvitation(invite *OrganizationInvite) error {
 	}
 	// insert the invitation in the database
 	_, err = ms.organizationInvites.InsertOne(ctx, invite)
+	// check if the user is already invited to the organization, the error is
+	// about the unique index
+	if merr, ok := err.(mongo.WriteException); ok {
+		for _, we := range merr.WriteErrors {
+			// duplicate key error has the code 11000:
+			// https://www.mongodb.com/docs/manual/reference/error-codes
+			if we.Code == 11000 {
+				return ErrAlreadyExists
+			}
+		}
+	}
 	return err
 }
 

db/organizations.go

@@ -12,8 +12,9 @@ import (
 )
 
 func (ms *MongoStorage) organization(ctx context.Context, address string) (*Organization, error) {
-	// find the organization in the database
-	result := ms.organizations.FindOne(ctx, bson.M{"_id": address})
+	// find the organization in the database by its address (case insensitive)
+	filter := bson.M{"_id": bson.M{"$regex": address, "$options": "i"}}
+	result := ms.organizations.FindOne(ctx, filter)
 	org := &Organization{}
 	if err := result.Decode(org); err != nil {
 		// if the organization doesn't exist return a specific error