Fix crashes in DMs, default to ephemeral on errors

doc.go

@@ -71,9 +71,20 @@ func (b *botState) handleDocs(e *gateway.InteractionCreateEvent) {
 
 	query := args["query"].String()
 	embed := b.onDocs(e, query, false)
-	var components *[]discord.Component
 
-	if !strings.HasPrefix(embed.Title, "Error") {
+	if strings.HasPrefix(embed.Title, "Error") {
+		err := b.state.DeleteInteractionResponse(e.AppID, e.Token)
+		if err != nil {
+			log.Println("failed to delete message:", err)
+			return
+		}
+		_, _ = b.state.CreateInteractionFollowup(e.AppID, e.Token, api.InteractionResponseData{
+			Flags:  api.EphemeralResponse,
+			Embeds: &[]discord.Embed{embed},
+		})
+		return
+	}
+
 	mu.Lock()
 	interactionMap[e.ID.String()] = &interactionData{
 		id:      e.ID.String(),
@@ -83,7 +94,9 @@ func (b *botState) handleDocs(e *gateway.InteractionCreateEvent) {
 	}
 	mu.Unlock()
 
-		components = &[]discord.Component{
+	if _, err := b.state.EditInteractionResponse(e.AppID, e.Token, api.EditInteractionResponseData{
+		Embeds: &[]discord.Embed{embed},
+		Components: &[]discord.Component{
 			discord.ActionRowComponent{
 				Components: []discord.Component{
 					discord.SelectComponent{
@@ -93,15 +106,8 @@ func (b *botState) handleDocs(e *gateway.InteractionCreateEvent) {
 					},
 				},
 			},
-		}
+		},
-	}
+	}); err != nil {
-
-	edit := api.EditInteractionResponseData{
-		Embeds:     &[]discord.Embed{embed},
-		Components: components,
-	}
-
-	if _, err := b.state.EditInteractionResponse(e.AppID, e.Token, edit); err != nil {
 		log.Println("failed to send interaction callback:", err)
 		return
 	}
@@ -111,15 +117,22 @@ func (b *botState) onDocsComponent(e *gateway.InteractionCreateEvent, data *inte
 	var embed discord.Embed
 	var components *[]discord.Component
 
-	var hasRole bool
+	// if e.Member is nil, all operations should be allowed
+	hasRole := e.Member == nil
+	if !hasRole {
 		for _, role := range e.Member.RoleIDs {
 			if _, ok := privilegedRoles[role]; ok {
 				hasRole = true
 				break
 			}
 		}
+	}
 
 	isAdmin := func() bool {
+		if e.Member == nil {
+			return true
+		}
+
 		perms, err := b.state.Permissions(e.ChannelID, e.User.ID)
 		if err != nil {
 			return false
@@ -342,6 +355,9 @@ func parseQuery(module string) (string, []string) {
 	dir, base := path.Split(strings.ToLower(module))
 	split := strings.Split(base, ".")
 	full := dir + split[0]
+	if strings.HasPrefix(full, "x/") {
+		full = "golang.org/" + full
+	}
 
 	if complete, ok := stdlibPackages[full]; ok {
 		full = complete

go.mod

@@ -4,7 +4,7 @@ go 1.17
 
 require (
 	github.com/diamondburned/arikawa/v3 v3.0.0-rc.1
-	github.com/hhhapz/doc v0.3.1
+	github.com/hhhapz/doc v0.3.2
 	github.com/k0kubun/pp v3.0.1+incompatible
 	github.com/pkg/errors v0.9.1
 )

go.sum

@@ -24,6 +24,8 @@ github.com/hhhapz/doc v0.3.0 h1:SuUTYmZu83tTXTQ0wyOWYCcVeSSxfzvnSXEsE6jr4VI=
 github.com/hhhapz/doc v0.3.0/go.mod h1:RzUhRa6guPMbXtNfNm4jW6aYCu+JBapioQEgrzoHSMo=
 github.com/hhhapz/doc v0.3.1 h1:TKlytW6nDcJydOIDffYF7OINF6z3x6AUhEvlnfXk9FU=
 github.com/hhhapz/doc v0.3.1/go.mod h1:RzUhRa6guPMbXtNfNm4jW6aYCu+JBapioQEgrzoHSMo=
+github.com/hhhapz/doc v0.3.2 h1:/FLWokA4uJRVuCX5Q+MPpX1gRP/sZiBPlmTrwtJf/Ws=
+github.com/hhhapz/doc v0.3.2/go.mod h1:RzUhRa6guPMbXtNfNm4jW6aYCu+JBapioQEgrzoHSMo=
 github.com/k0kubun/colorstring v0.0.0-20150214042306-9440f1994b88 h1:uC1QfSlInpQF+M0ao65imhwqKnz3Q2z/d8PWZRMQvDM=
 github.com/k0kubun/colorstring v0.0.0-20150214042306-9440f1994b88/go.mod h1:3w7q1U84EfirKl04SVQ/s7nPm1ZPhiXd34z40TNz36k=
 github.com/k0kubun/pp v3.0.1+incompatible h1:3tqvf7QgUnZ5tXO6pNAZlrvHgl6DvifjDrd9g2S9Z40=

main.go

@@ -22,7 +22,7 @@ type botState struct {
 }
 
 func (b *botState) OnCommand(e *gateway.InteractionCreateEvent) {
-	if e.GuildID != discord.NullGuildID {
+	if e.GuildID != 0 {
 		e.User = &e.Member.User
 	}