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handler.go
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handler.go
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package webhookbot
import (
"errors"
"fmt"
"strings"
_ "github.com/go-sql-driver/mysql"
"github.com/malware-unicorn/go-keybase-chat-bot/kbchat"
"github.com/malware-unicorn/go-keybase-chat-bot/kbchat/types/chat1"
"github.com/malware-unicorn/managed-bots/base"
)
type Handler struct {
*base.DebugOutput
stats *base.StatsRegistry
kbc *kbchat.API
db *DB
httpSrv *HTTPSrv
httpPrefix string
}
var _ base.Handler = (*Handler)(nil)
func NewHandler(stats *base.StatsRegistry, kbc *kbchat.API, debugConfig *base.ChatDebugOutputConfig,
httpSrv *HTTPSrv, db *DB, httpPrefix string) *Handler {
return &Handler{
DebugOutput: base.NewDebugOutput("Handler", debugConfig),
stats: stats.SetPrefix("Handler"),
kbc: kbc,
db: db,
httpSrv: httpSrv,
httpPrefix: httpPrefix,
}
}
func (h *Handler) formURL(id string) string {
return fmt.Sprintf("%s/webhookbot/%s", h.httpPrefix, id)
}
var errNeedAdmin = errors.New("only admins can administer webhooks")
func (h *Handler) checkAdmin(msg chat1.MsgSummary) error {
ok, err := base.IsAdmin(h.kbc, msg.Sender.Username, msg.Channel)
if err != nil {
return fmt.Errorf("handleCreate: failed to check admin: %s", err)
}
if !ok {
return errNeedAdmin
}
return nil
}
func (h *Handler) handleRemove(cmd string, msg chat1.MsgSummary) error {
convID := msg.ConvID
toks := strings.Split(cmd, " ")
if len(toks) != 3 {
h.ChatEcho(convID, "invalid number of arguments, must specify a name")
return nil
}
if err := h.checkAdmin(msg); err != nil {
if err == errNeedAdmin {
h.ChatEcho(convID, err.Error())
return nil
}
return err
}
h.stats.Count("remove")
name := toks[2]
if err := h.db.Remove(name, convID); err != nil {
return fmt.Errorf("handleRemove: failed to remove webhook: %s", err)
}
h.ChatEcho(convID, "Success!")
return nil
}
func (h *Handler) handleList(cmd string, msg chat1.MsgSummary) error {
convID := msg.ConvID
hooks, err := h.db.List(convID)
if err != nil {
return fmt.Errorf("handleList: failed to list hook: %s", err)
}
if err := h.checkAdmin(msg); err != nil {
if err == errNeedAdmin {
h.ChatEcho(convID, err.Error())
return nil
}
return err
}
h.stats.Count("list")
if len(hooks) == 0 {
h.ChatEcho(convID, "No hooks in this conversation")
return nil
}
var body string
for _, hook := range hooks {
body += fmt.Sprintf("%s, %s\n", hook.name, h.formURL(hook.id))
}
if _, err := h.kbc.SendMessageByTlfName(msg.Sender.Username, body); err != nil {
h.Debug("handleList: failed to send hook: %s", err)
}
h.ChatEcho(convID, "List sent to @%s", msg.Sender.Username)
return nil
}
func (h *Handler) handleCreate(cmd string, msg chat1.MsgSummary) error {
convID := msg.ConvID
toks := strings.Split(cmd, " ")
if len(toks) != 3 {
h.ChatEcho(convID, "invalid number of arguments, must specify a name")
return nil
}
if err := h.checkAdmin(msg); err != nil {
if err == errNeedAdmin {
h.ChatEcho(convID, err.Error())
return nil
}
return err
}
h.stats.Count("create")
name := toks[2]
id, err := h.db.Create(name, convID)
if err != nil {
return fmt.Errorf("handleCreate: failed to create webhook: %s", err)
}
if _, err := h.kbc.SendMessageByTlfName(msg.Sender.Username, "%s", h.formURL(id)); err != nil {
h.Debug("handleCreate: failed to send hook: %s", err)
}
h.ChatEcho(convID, "Success! New URL sent to @%s", msg.Sender.Username)
return nil
}
func (h *Handler) HandleNewConv(conv chat1.ConvSummary) error {
welcomeMsg := "I can create generic webhooks into Keybase! Try `!webhook create` to get started."
return base.HandleNewTeam(h.stats, h.DebugOutput, h.kbc, conv, welcomeMsg)
}
func (h *Handler) HandleCommand(msg chat1.MsgSummary) error {
if msg.Content.Text == nil {
return nil
}
cmd := strings.TrimSpace(msg.Content.Text.Body)
switch {
case strings.HasPrefix(cmd, "!webhook create"):
return h.handleCreate(cmd, msg)
case strings.HasPrefix(cmd, "!webhook list"):
return h.handleList(cmd, msg)
case strings.HasPrefix(cmd, "!webhook remove"):
return h.handleRemove(cmd, msg)
}
return nil
}