chore: add /lcd_delete command

pkg/constants/constants.go

@@ -25,4 +25,5 @@ var (
 	ErrWrongInvocation = errors.New("wrong invocation")
 	ErrChainNotFound   = fmt.Errorf("chain not found")
 	ErrChainNotBound   = fmt.Errorf("chain not bound to this chat")
+	ErrLCDNotFound     = fmt.Errorf("chain LCD host not found")
 )

pkg/database/lcd.go

@@ -52,3 +52,14 @@ func (d *Database) InsertLCDHost(chain *types.Chain, host string) error {
 
 	return nil
 }
+
+func (d *Database) DeleteLCDHost(chain *types.Chain, host string) (bool, error) {
+	result, err := d.client.Exec("DELETE FROM lcd WHERE chain = $1 AND host = $2", chain.Name, host)
+	if err != nil {
+		d.logger.Error().Err(err).Msg("Could not delete LCD host")
+		return false, err
+	}
+
+	rowsAffected, _ := result.RowsAffected()
+	return rowsAffected > 0, nil
+}

pkg/interacter/telegram/lcd_delete.go

@@ -0,0 +1,51 @@
+package telegram
+
+import (
+	"fmt"
+	"html"
+	"main/pkg/constants"
+	"main/pkg/types"
+	"strings"
+
+	tele "gopkg.in/telebot.v3"
+)
+
+func (interacter *Interacter) GetLCDDeleteCommand() Command {
+	return Command{
+		Name:    "lcd_delete",
+		Execute: interacter.HandleDeleteLCD,
+	}
+}
+
+func (interacter *Interacter) HandleDeleteLCD(c tele.Context, chainBinds []string) (string, error) {
+	args := strings.SplitN(c.Text(), " ", 3)
+	if len(args) < 3 {
+		return html.EscapeString(fmt.Sprintf("Usage: %s <chain name> <host>", args[0])), constants.ErrWrongInvocation
+	}
+
+	chainName, host := args[1], args[2]
+	chain, err := interacter.Database.GetChainByName(chainName)
+	if err != nil {
+		return "Error finding chain!", err
+	}
+
+	allLCDs, err := interacter.Database.GetLCDHosts(chain)
+	if err != nil {
+		return "Error finding LCD hosts!", err
+	}
+
+	if len(allLCDs) <= 1 {
+		return "Cannot remove the only chain LCD!", constants.ErrWrongInvocation
+	}
+
+	deleted, insertErr := interacter.Database.DeleteLCDHost(chain, host)
+	if insertErr != nil {
+		return "Error deleting LCD host!", insertErr
+	}
+
+	if !deleted {
+		return "Chain LCD host was not found!", constants.ErrLCDNotFound
+	}
+
+	return interacter.TemplateManager.Render("lcd_delete", types.ChainWithLCD{Chain: *chain, LCDEndpoint: host})
+}

pkg/interacter/telegram/telegram.go

@@ -101,6 +101,7 @@ func (interacter *Interacter) Init() {
 	interacter.AddCommand("/denom_add", bot, interacter.GetDenomAddCommand())
 	interacter.AddCommand("/denom_delete", bot, interacter.GetDenomDeleteCommand())
 	interacter.AddCommand("/lcd_add", bot, interacter.GetLCDAddCommand())
+	interacter.AddCommand("/lcd_delete", bot, interacter.GetLCDDeleteCommand())
 
 	interacter.TelegramBot = bot
 }

templates/telegram/lcd_delete.html

@@ -0,0 +1,3 @@
+Successfully deleted LCD host!
+<strong>Chain name:</strong> <code>{{ .Chain.Name }}</code>
+<strong>LCD endpoint:</strong> <code>{{ .LCDEndpoint }}</code>