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package discord
import (
"errors"
"time"
"github.com/nicholas-fedor/shoutrrr/pkg/types"
"github.com/nicholas-fedor/shoutrrr/pkg/util"
)
const (
MaxEmbeds = 9
)
// Static error definition.
var ErrEmptyMessage = errors.New("message is empty")
// WebhookPayload is the webhook endpoint payload.
type WebhookPayload struct {
Embeds []embedItem `json:"embeds"`
Username string `json:"username,omitempty"`
AvatarURL string `json:"avatar_url,omitempty"`
}
// JSON is the actual notification payload.
type embedItem struct {
Title string `json:"title,omitempty"`
Content string `json:"description,omitempty"`
URL string `json:"url,omitempty"`
Timestamp string `json:"timestamp,omitempty"`
Color uint `json:"color,omitempty"`
Footer *embedFooter `json:"footer,omitempty"`
}
type embedFooter struct {
Text string `json:"text"`
IconURL string `json:"icon_url,omitempty"`
}
// CreatePayloadFromItems creates a JSON payload to be sent to the discord webhook API.
func CreatePayloadFromItems(
items []types.MessageItem,
title string,
colors [types.MessageLevelCount]uint,
) (WebhookPayload, error) {
if len(items) < 1 {
return WebhookPayload{}, ErrEmptyMessage
}
itemCount := util.Min(MaxEmbeds, len(items))
embeds := make([]embedItem, 0, itemCount)
for _, item := range items {
color := uint(0)
if item.Level >= types.Unknown && int(item.Level) < len(colors) {
color = colors[item.Level]
}
embeddedItem := embedItem{
Content: item.Text,
Color: color,
}
if item.Level != types.Unknown {
embeddedItem.Footer = &embedFooter{
Text: item.Level.String(),
}
}
if !item.Timestamp.IsZero() {
embeddedItem.Timestamp = item.Timestamp.UTC().Format(time.RFC3339)
}
embeds = append(embeds, embeddedItem)
}
// This should not happen, but it's better to leave the index check before dereferencing the array
if len(embeds) > 0 {
embeds[0].Title = title
}
return WebhookPayload{
Embeds: embeds,
}, nil
}
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