[filesay] Add FileSay actor

Signed-off-by: Knut Ahlers <knut@ahlers.me>

internal/actors/filesay/actor.go

@@ -0,0 +1,115 @@
+package filesay
+
+import (
+	"bufio"
+	"context"
+	"net/http"
+	"net/url"
+	"time"
+
+	"github.com/go-irc/irc"
+	"github.com/pkg/errors"
+
+	"github.com/Luzifer/twitch-bot/plugins"
+)
+
+const (
+	actorName = "filesay"
+
+	httpTimeout = 5 * time.Second
+)
+
+var (
+	formatMessage plugins.MsgFormatter
+	send          plugins.SendMessageFunc
+)
+
+func Register(args plugins.RegistrationArguments) error {
+	formatMessage = args.FormatMessage
+	send = args.SendMessage
+
+	args.RegisterActor(actorName, func() plugins.Actor { return &actor{} })
+
+	args.RegisterActorDocumentation(plugins.ActionDocumentation{
+		Description: "Takes the content of an URL and pastes it to the current channel",
+		Name:        "FileSay",
+		Type:        actorName,
+
+		Fields: []plugins.ActionDocumentationField{
+			{
+				Default:         "",
+				Description:     "Source of the content to post",
+				Key:             "source",
+				Name:            "source",
+				Optional:        false,
+				SupportTemplate: true,
+				Type:            plugins.ActionDocumentationFieldTypeString,
+			},
+		},
+	})
+
+	return nil
+}
+
+type actor struct{}
+
+func (a actor) Execute(c *irc.Client, m *irc.Message, r *plugins.Rule, eventData *plugins.FieldCollection, attrs *plugins.FieldCollection) (preventCooldown bool, err error) {
+	ptrStringEmpty := func(v string) *string { return &v }("")
+
+	source, err := formatMessage(attrs.MustString("source", ptrStringEmpty), m, r, eventData)
+	if err != nil {
+		return false, errors.Wrap(err, "executing source template")
+	}
+
+	if source == "" {
+		return false, errors.New("source template evaluated to empty string")
+	}
+
+	if _, err := url.Parse(source); err != nil {
+		return false, errors.Wrap(err, "parsing URL")
+	}
+
+	ctx, cancel := context.WithTimeout(context.Background(), httpTimeout)
+	defer cancel()
+
+	req, err := http.NewRequestWithContext(ctx, http.MethodGet, source, nil)
+	if err != nil {
+		return false, errors.Wrap(err, "creating HTTP request")
+	}
+
+	resp, err := http.DefaultClient.Do(req)
+	if err != nil {
+		return false, errors.Wrap(err, "executing HTTP request")
+	}
+	defer resp.Body.Close()
+
+	if resp.StatusCode != http.StatusOK {
+		return false, errors.Errorf("http status %d", resp.StatusCode)
+	}
+
+	scanner := bufio.NewScanner(resp.Body)
+	for scanner.Scan() {
+		if err = c.WriteMessage(&irc.Message{
+			Command: "PRIVMSG",
+			Params: []string{
+				plugins.DeriveChannel(m, eventData),
+				scanner.Text(),
+			},
+		}); err != nil {
+			return false, errors.Wrap(err, "sending message")
+		}
+	}
+
+	return false, nil
+}
+
+func (a actor) IsAsync() bool { return true }
+func (a actor) Name() string  { return actorName }
+
+func (a actor) Validate(attrs *plugins.FieldCollection) error {
+	if v, err := attrs.String("source"); err != nil || v == "" {
+		return errors.New("source is expected to be non-empty string")
+	}
+
+	return nil
+}

plugins_core.go

@@ -13,6 +13,7 @@ import (
 	"github.com/Luzifer/twitch-bot/internal/actors/ban"
 	"github.com/Luzifer/twitch-bot/internal/actors/delay"
 	deleteactor "github.com/Luzifer/twitch-bot/internal/actors/delete"
+	"github.com/Luzifer/twitch-bot/internal/actors/filesay"
 	"github.com/Luzifer/twitch-bot/internal/actors/modchannel"
 	"github.com/Luzifer/twitch-bot/internal/actors/nuke"
 	"github.com/Luzifer/twitch-bot/internal/actors/punish"
@@ -37,6 +38,7 @@ var (
 		ban.Register,
 		delay.Register,
 		deleteactor.Register,
+		filesay.Register,
 		modchannel.Register,
 		nuke.Register,
 		punish.Register,

wiki/Actors.md

@@ -57,6 +57,19 @@ Execute external script / command
     skip_cooldown_on_error: false
 ```
 
+## FileSay
+
+Takes the content of an URL and pastes it to the current channel
+
+```yaml
+- type: filesay
+  attributes:
+    # Source of the content to post
+    # Optional: false
+    # Type:     string (Supports Templating)
+    source: ""
+```
+
 ## Modify Counter
 
 Update counter values