Merge pull request #695 from gclamigueiro/send-email-to-admins-when-u…

…ser-leave-the-loop

send email to admins when user leave the loop

server/internal/controllers/chain.go

@@ -546,6 +546,14 @@ func ChainRemoveUser(c *gin.Context) {
 	}
 
 	chain.ClearAllLastNotifiedIsUnapprovedAt(db)
+
+	// if the user is removed by an admin, do not send an email to this one
+	var excludedEmail string
+	if _, isChainAdmin := authUser.IsPartOfChain(chain.UID); isChainAdmin {
+		excludedEmail = authUser.Email.String
+	}
+	// send email to chain admins
+	services.EmailLoopAdminsOnUserLeft(db, user.Name, user.Email.String, excludedEmail, chain.ID)
 }
 
 func ChainApproveUser(c *gin.Context) {

server/internal/controllers/users.go

@@ -12,6 +12,7 @@ import (
 	"github.com/the-clothing-loop/website/server/internal/app/auth"
 	"github.com/the-clothing-loop/website/server/internal/app/goscope"
 	"github.com/the-clothing-loop/website/server/internal/models"
+	"github.com/the-clothing-loop/website/server/internal/services"
 	"github.com/the-clothing-loop/website/server/internal/views"
 	"github.com/the-clothing-loop/website/server/pkg/noderoute"
 	"gopkg.in/guregu/null.v3"
@@ -344,6 +345,19 @@ func UserPurge(c *gin.Context) {
 		}
 	}
 
+	err := user.AddUserChainsToObject(db)
+	if err != nil {
+		c.AbortWithError(http.StatusInternalServerError, err)
+		return
+	}
+
+	// notify connected hosts, send email to chain admins
+	chainIDs := []uint{}
+	for _, uc := range user.Chains {
+		chainIDs = append(chainIDs, uc.ChainID)
+	}
+	services.EmailLoopAdminsOnUserLeft(db, user.Name, user.Email.String, "", chainIDs...)
+
 	// find chains where user is the last chain admin
 	chainIDsToDelete := []uint{}
 	db.Raw(`
@@ -360,7 +374,7 @@ HAVING COUNT(uc.id) = 1
 
 	tx := db.Begin()
 
-	err := user.DeleteUserChainDependenciesAllChains(tx)
+	err = user.DeleteUserChainDependenciesAllChains(tx)
 	if err != nil {
 		tx.Rollback()
 		goscope.Log.Errorf("UserPurge: %v", err)

server/internal/services/email.go

@@ -13,7 +13,6 @@ import (
 Given a user and a list of ChainIds, this method performs the following actions:
 - searchs all admin from the given chains
 - sends them an email with the new user's information.
-- Also, it sends an email to the user for every loop he intends to join.
 */
 func EmailLoopAdminsOnUserJoin(db *gorm.DB, user *models.User, chainIDs ...uint) error {
 	// find admin users related to the chain to email
@@ -46,6 +45,35 @@ func EmailLoopAdminsOnUserJoin(db *gorm.DB, user *models.User, chainIDs ...uint)
 	return nil
 }
 
+// excludedEmail can be an empty string
+func EmailLoopAdminsOnUserLeft(db *gorm.DB, removedUserName, removedUserEmail, excludedEmail string, chainIDs ...uint) error {
+	// find admin users related to the chain to email
+	admins, err := models.UserGetAdminsByChain(db, chainIDs...)
+	if err != nil {
+		return err
+	}
+
+	if len(admins) == 0 {
+		goscope.Log.Errorf("Empty chain that is still public: ChainID: %d", chainIDs)
+		return fmt.Errorf("No admins exist for this loop")
+	}
+
+	for _, admin := range admins {
+		email := admin.Email
+		if !email.Valid || excludedEmail == email.String || removedUserEmail == email.String {
+			continue
+		}
+		views.EmailSomeoneLeftLoop(db, admin.I18n,
+			admin.Name,
+			admin.Email.String,
+			admin.ChainName,
+			removedUserName,
+		)
+	}
+
+	return nil
+}
+
 func EmailYouSignedUpForLoop(db *gorm.DB, user *models.User, chainNames ...string) error {
 	for _, chainName := range chainNames {
 		if !user.Email.Valid {