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response_writer.go
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/
response_writer.go
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package slacker
import (
"context"
"fmt"
"github.com/slack-go/slack"
)
// newWriter creates a new poster structure
func newWriter(ctx context.Context, logger Logger, slackClient *slack.Client) *Writer {
return &Writer{ctx: ctx, logger: logger, slackClient: slackClient}
}
// Writer sends messages to Slack
type Writer struct {
ctx context.Context
logger Logger
slackClient *slack.Client
}
// Post send a message to a channel
func (r *Writer) Post(channel string, message string, options ...PostOption) (string, error) {
return r.post(channel, message, []slack.Block{}, options...)
}
// PostError send an error to a channel
func (r *Writer) PostError(channel string, err error, options ...PostOption) (string, error) {
attachments := []slack.Attachment{}
attachments = append(attachments, slack.Attachment{
Color: "danger",
Text: err.Error(),
})
return r.post(channel, "", []slack.Block{}, SetAttachments(attachments))
}
// PostBlocks send blocks to a channel
func (r *Writer) PostBlocks(channel string, blocks []slack.Block, options ...PostOption) (string, error) {
return r.post(channel, "", blocks, options...)
}
// Delete deletes message
func (r *Writer) Delete(channel string, messageTimestamp string) (string, error) {
_, timestamp, err := r.slackClient.DeleteMessage(
channel,
messageTimestamp,
)
if err != nil {
r.logger.Error("failed to delete message", "error", err)
}
return timestamp, err
}
func (r *Writer) post(channel string, message string, blocks []slack.Block, options ...PostOption) (string, error) {
postOptions := newPostOptions(options...)
opts := []slack.MsgOption{
slack.MsgOptionText(message, false),
slack.MsgOptionAttachments(postOptions.Attachments...),
slack.MsgOptionBlocks(blocks...),
}
if len(postOptions.ThreadTS) > 0 {
opts = append(opts, slack.MsgOptionTS(postOptions.ThreadTS))
}
if len(postOptions.ReplaceMessageTS) > 0 {
opts = append(opts, slack.MsgOptionUpdate(postOptions.ReplaceMessageTS))
}
if len(postOptions.EphemeralUserID) > 0 {
opts = append(opts, slack.MsgOptionPostEphemeral(postOptions.EphemeralUserID))
}
if postOptions.ScheduleTime != nil {
postAt := fmt.Sprintf("%d", postOptions.ScheduleTime.Unix())
opts = append(opts, slack.MsgOptionSchedule(postAt))
}
_, timestamp, err := r.slackClient.PostMessageContext(
r.ctx,
channel,
opts...,
)
if err != nil {
r.logger.Error("failed to post message", "error", err)
}
return timestamp, err
}