feat: add notifications (#216)

* feat: initial notifications support

* chore: update deps

internal/notification/discord.go

@@ -0,0 +1,104 @@
+package notification
+
+import (
+	"bytes"
+	"crypto/tls"
+	"encoding/json"
+	"net/http"
+	"time"
+
+	"github.com/autobrr/autobrr/internal/domain"
+
+	"github.com/rs/zerolog/log"
+)
+
+type DiscordMessage struct {
+	Content  interface{}     `json:"content"`
+	Embeds   []DiscordEmbeds `json:"embeds"`
+	Username string          `json:"username"`
+}
+
+type DiscordEmbeds struct {
+	Title       string                `json:"title"`
+	Description string                `json:"description"`
+	Color       int                   `json:"color"`
+	Fields      []DiscordEmbedsFields `json:"fields"`
+	Timestamp   time.Time             `json:"timestamp"`
+}
+type DiscordEmbedsFields struct {
+	Name   string `json:"name"`
+	Value  string `json:"value"`
+	Inline bool   `json:"inline,omitempty"`
+}
+
+func discordNotification(event domain.EventsReleasePushed, webhookURL string) {
+	t := &http.Transport{
+		TLSClientConfig: &tls.Config{
+			InsecureSkipVerify: true,
+		},
+	}
+
+	client := http.Client{Transport: t, Timeout: 15 * time.Second}
+
+	m := DiscordMessage{
+		Content: nil,
+		Embeds: []DiscordEmbeds{
+			{
+				Title:       event.ReleaseName,
+				Description: "New release!",
+				Color:       5814783,
+				Fields: []DiscordEmbedsFields{
+					{
+						Name:   "Status",
+						Value:  event.Status.String(),
+						Inline: true,
+					},
+					{
+						Name:   "Indexer",
+						Value:  event.Indexer,
+						Inline: true,
+					},
+					{
+						Name:   "Filter",
+						Value:  event.Filter,
+						Inline: true,
+					},
+					{
+						Name:   "Action",
+						Value:  event.Action,
+						Inline: false,
+					},
+				},
+				Timestamp: time.Now(),
+			},
+		},
+		Username: "brr",
+	}
+
+	jsonData, err := json.Marshal(m)
+	if err != nil {
+		log.Error().Err(err).Msgf("discord client could not marshal data: %v", m)
+		return
+	}
+
+	req, err := http.NewRequest(http.MethodPost, webhookURL, bytes.NewBuffer(jsonData))
+	if err != nil {
+		//log.Error().Err(err).Msgf("webhook client request error: %v", action.WebhookHost)
+		return
+	}
+
+	req.Header.Set("Content-Type", "application/json")
+	//req.Header.Set("User-Agent", "autobrr")
+
+	res, err := client.Do(req)
+	if err != nil {
+		//log.Error().Err(err).Msgf("webhook client request error: %v", action.WebhookHost)
+		return
+	}
+
+	defer res.Body.Close()
+
+	log.Debug().Msg("notification successfully sent to discord")
+
+	return
+}