dimitar
55789ab7d7
Implement the webhook dispatch subsystem so watch sessions can relay scan
results to external services when repositories change.
Webhook package (internal/webhook):
- Sender interface (Name + Send(ctx, Payload)) with three concrete
implementations:
- SlackSender: Block Kit message (header + mrkdwn section with summary
and change list + context footer), emoji status markers
- DiscordSender: single rich embed with color-coded sidebar (green=
clean, yellow=attention, red=errors) and markdown description
- GenericSender: raw JSON POST of the Payload struct, with custom
headers from config
- Config struct per destination: type, URL, send_all, on_change_only,
min_priority, rate_limit, timeout, custom headers, retry (max_attempts
+ backoff); TimeoutOrDefault helper
- NewSender factory switches on type; unknown types rejected
- Dispatcher: NewDispatcher builds a senderHandle per config (sender +
rate-limit state + its own http.Client with per-config timeout);
Dispatch() fans out with per-sender guards: on_change_only skips when
changedCount==0, rate_limit skips when too soon (lastSent check)
- senderHandle.sendWithRetry: retries with exponential backoff on
transient errors (5xx/timeout); 4xx errors fail immediately;
isRetryable helper
HTTP client (internal/httpclient):
- PostJSON now skips json.Unmarshal when out==nil, matching the common
webhook pattern where the response body is irrelevant
Testing:
- All three sender types round-trip through httptest (request payload
decoded and asserted)
- Discord embed colour: yellow for attention, red for errors
- Generic sender payload integrity check
- Dispatcher: OnChangeOnly guard skips when changedCount==0; multiple
senders all fire; HTTP errors surfaced (500)
- Retry: 504 Gateway Timeout retried 3× before succeeding via the
dispatcher's sendWithRetry
- NewSender rejects unknown types, requires a name for identification
Verified: go build, go vet, go test -race (13 packages), gofmt clean.
86 lines
2.2 KiB
Go
86 lines
2.2 KiB
Go
package webhook
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import (
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"context"
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"fmt"
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"strings"
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"time"
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"gitea.oblak.solutions/dimitar/gitFlow/internal/httpclient"
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)
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// DiscordSender posts to a Discord webhook URL using a single rich embed.
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type DiscordSender struct {
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cfg Config
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http *httpclient.Client
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}
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func newDiscord(cfg Config) *DiscordSender {
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return &DiscordSender{cfg: cfg, http: httpclient.New(httpclient.WithTimeout(cfg.TimeoutOrDefault()))}
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}
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func (s *DiscordSender) Name() string { return s.cfg.Name }
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type discordMessage struct {
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Embeds []discordEmbed `json:"embeds"`
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}
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type discordEmbed struct {
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Title string `json:"title"`
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Description string `json:"description"`
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Color int `json:"color"`
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Footer *discordFooter `json:"footer,omitempty"`
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Timestamp string `json:"timestamp,omitempty"`
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}
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type discordFooter struct {
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Text string `json:"text"`
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}
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// Status-to-color mapping: green=clean, yellow=attention, red=errors.
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func embedColor(s Payload) int {
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switch {
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case s.Summary.Errored > 0:
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return 15158332 // red
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case s.Summary.Attention > 0:
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return 16776960 // yellow
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default:
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return 3066993 // green
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}
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}
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func (s *DiscordSender) Send(ctx context.Context, payload Payload) error {
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msg := discordMessage{
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Embeds: []discordEmbed{{
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Title: "gitflow scan",
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Description: discordBody(payload),
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Color: embedColor(payload),
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Footer: &discordFooter{Text: "gitflow"},
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Timestamp: payload.Timestamp.Format(time.RFC3339),
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}},
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}
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return s.http.PostJSON(ctx, s.cfg.URL, nil, msg, nil)
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}
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func discordBody(p Payload) string {
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var b strings.Builder
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s := p.Summary
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fmt.Fprintf(&b, "**%s** — %d repos: %d clean, %d attention, %d errors\n\n",
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p.ParentDir, s.Total, s.Clean, s.Attention, s.Errored)
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if len(p.Changed) > 0 {
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b.WriteString("**Changed:**\n")
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for _, r := range p.Changed {
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sym := statusSymbol(r.Status)
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line := fmt.Sprintf("%s **%s** — %s (%s)", sym, r.Name, r.Status, r.Branch)
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if r.AheadBy > 0 || r.BehindBy > 0 {
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line += fmt.Sprintf(" +%d/-%d", r.AheadBy, r.BehindBy)
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}
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if n := r.FileCount(); n > 0 {
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line += fmt.Sprintf(" %d file(s)", n)
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}
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b.WriteString(line + "\n")
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}
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}
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return b.String()
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}
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