feat: add 1984 audit-logging module#95
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Adds a new "1984" module that logs every message activity and voice-channel event across all visible channels to a single configured audit channel: - Message create / edit / delete (with diff for edits) - Reaction add / remove - Voice channel create / rename - Voice channel status updates (via raw gateway event) Edits render as a unified diff inside a ```diff``` fenced block, with full before/after/diff also attached as files. Discord API safety: a single buildPayload chokepoint enforces content length (1900 chars), attachment count (10), and per-file size (8MB); overflow is offloaded to text attachments. Truncation is UTF-8 rune-aware so multi-byte runes (emoji/CJK) are never split. Edge cases handled: - MESSAGE_UPDATE is partial: requires EditedTimestamp != nil and falls back to BeforeUpdate.Author when payload omits it (avoids false "content cleared" entries from embed unfurls etc). - CHANNEL_UPDATE is also partial: requires cached BeforeUpdate to confirm an actual rename before logging. - Sticker / poll / component-only message creates are not silently dropped. - Skips the log channel itself, DMs, and the bot's own messages. Configuration via new key gamerpals_1984_log_channel_id. Module is wired up in bot.go with session.State.MaxMessageCount=500 so discordgo populates BeforeUpdate / BeforeDelete from cache. Tests are table-driven with ~94% coverage including a long-diff stress case that asserts the final payload stays within Discord's limits. Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
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✅ Development deployment succeeded! On successful deployments, you'll need to wait a moment for the bot to fully boot up AND refresh/reload your Discord client if you see a message about invalid integration ID. Thanks! |
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Pull request overview
Adds a new 1984 (“nineteeneightyfour”) command module that passively audit-logs message activity, reactions, and select voice-channel events into a configured Discord channel, plus the config wiring and bot event-handler wiring needed to support it.
Changes:
- Introduces the
nineteeneightyfourmodule with Discord event handlers and a payload builder that enforces Discord message/attachment limits. - Wires the module into the bot runtime (handlers + Discord state message cache sizing) and module registration.
- Adds new config key
gamerpals_1984_log_channel_id(accessor, example YAML,/config list-keysentry) and addsgo-difflibfor unified diff rendering.
Show a summary per file
| File | Description |
|---|---|
| internal/commands/modules/nineteeneightyfour/nineteeneightyfour.go | New audit-logging module: handlers, diff rendering, payload sizing/attachment logic. |
| internal/commands/modules/nineteeneightyfour/nineteeneightyfour_test.go | New table-driven tests covering payload building, truncation, and event handler behavior. |
| internal/bot/bot.go | Enables message caching for before/after and registers 1984 event handlers (including raw events). |
| internal/commands/module_handler.go | Registers the new module under key "1984". |
| internal/config/config_accessors.go | Adds accessor for gamerpals_1984_log_channel_id. |
| internal/commands/modules/config/config.go | Adds the new config key to /config list-keys. |
| config.example.yaml | Documents the new config key and how to disable the module. |
| go.mod | Promotes github.com/pmezard/go-difflib to a direct dependency. |
Copilot's findings
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- Files reviewed: 8/8 changed files
- Comments generated: 5
| if len(a.content) > inlineContentCap { | ||
| files = append(files, fileSpec{ | ||
| name: a.name, | ||
| content: clampBytes([]byte(a.content), maxAttachmentBytes), | ||
| }) | ||
| } |
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buildPayload only uploads a provided attachment when len(a.content) > inlineContentCap. This means before/after/diff (and content.txt) will not be attached for typical small edits/messages, which conflicts with the PR description claiming the full artifacts are attached “for completeness”. If the intent is to always attach these artifacts, buildPayload likely needs to upload all non-empty attachments (or support a force-upload flag).
| if author != nil { | ||
| fmt.Fprintf(&b, "**User:** `%s` (ID: `%s`)\n", author.Username, author.ID) | ||
| } else { | ||
| b.WriteString("**User:** `(unknown)`\n") | ||
| } |
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buildHeader wraps author.Username in backticks but does not escape backticks/markdown-sensitive characters. A username (or channel name elsewhere) containing ` will break the formatting of the audit message. Consider sanitizing these values (e.g., replace backticks or apply a small markdown-escape helper) before embedding them in inline code spans.
| tests := []struct { | ||
| name string | ||
| before string | ||
| after string | ||
| wantSubstrs []string | ||
| wantEmpty bool | ||
| }{ | ||
| { | ||
| name: "single line change shows minus and plus", | ||
| before: "hello", | ||
| after: "world", | ||
| wantSubstrs: []string{"-hello", "+world", "@@"}, | ||
| }, | ||
| { | ||
| name: "added line", | ||
| before: "a\n", | ||
| after: "a\nb\n", | ||
| wantSubstrs: []string{"+b"}, | ||
| }, | ||
| { | ||
| name: "identical inputs produce empty diff", |
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This section of the new test file appears not gofmt-formatted (indentation missing). Please run gofmt on the file to match repo conventions and keep the tests readable.
| tests := []struct { | |
| name string | |
| before string | |
| after string | |
| wantSubstrs []string | |
| wantEmpty bool | |
| }{ | |
| { | |
| name: "single line change shows minus and plus", | |
| before: "hello", | |
| after: "world", | |
| wantSubstrs: []string{"-hello", "+world", "@@"}, | |
| }, | |
| { | |
| name: "added line", | |
| before: "a\n", | |
| after: "a\nb\n", | |
| wantSubstrs: []string{"+b"}, | |
| }, | |
| { | |
| name: "identical inputs produce empty diff", | |
| tests := []struct { | |
| name string | |
| before string | |
| after string | |
| wantSubstrs []string | |
| wantEmpty bool | |
| }{ | |
| { | |
| name: "single line change shows minus and plus", | |
| before: "hello", | |
| after: "world", | |
| wantSubstrs: []string{"-hello", "+world", "@@"}, | |
| }, | |
| { | |
| name: "added line", | |
| before: "a\n", | |
| after: "a\nb\n", | |
| wantSubstrs: []string{"+b"}, | |
| }, | |
| { | |
| name: "identical inputs produce empty diff", |
| body := strings.TrimSpace(e.Content) | ||
| // A message create is worth logging if it has any user-visible payload: | ||
| // text, attachments, embeds, stickers, polls, or interactive components. |
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OnMessageCreate uses strings.TrimSpace(e.Content), which alters the audited content (leading/trailing whitespace is removed) and makes whitespace-only messages look empty (and then skipped by the “no user-visible payload” check). For an audit logger, consider preserving the exact raw content for logging/attachments and only trimming for a separate emptiness check if needed.
| body := strings.TrimSpace(e.Content) | |
| // A message create is worth logging if it has any user-visible payload: | |
| // text, attachments, embeds, stickers, polls, or interactive components. | |
| body := e.Content | |
| // A message create is worth logging if it has any payload: | |
| // raw text (including whitespace-only messages), attachments, embeds, | |
| // stickers, polls, or interactive components. |
| func (m *Module) shouldLog(s *discordgo.Session, guildID, channelID string, author *discordgo.User) bool { | ||
| if guildID == "" { | ||
| return false | ||
| } | ||
| if !m.shouldLogChannel(channelID) { | ||
| return false |
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shouldLog only checks guildID != "" and does not scope logging to the configured GamerPals server ID. If the bot is in multiple guilds, this can route events from other guilds into the configured audit channel (cross-guild data leak / permission confusion). Consider adding an optional guard: if cfg.GetGamerPalsServerID() is set, require guildID to match before logging (and apply similarly to channel/raw events).
When a logged message has image attachments, fetch them via a hookable HTTP client and re-upload them to the log channel so the evidence survives the original message being edited or deleted (the Discord CDN URL is short-lived). - Add fetchImage hook to Module (default: 15s http.Client, image/* only, capped at maxAttachmentBytes). - Add isImageAttachment helper (content-type then extension fallback). - Refactor buildPayload to take extraFiles []fileSpec; binary files take priority for the 10-attachment slot cap. - Replace the combined.txt overflow merge with drop-and-note (the merge would corrupt mixed binary/text content). - defaultDispatchLog now picks per-file Content-Type via http.DetectContentType so re-hosted images render inline. - Tests for isImageAttachment, rehostImages (success / failure / oversize / non-image / mixed / nil), OnMessageCreate rehosting integration, fetch failure tolerance, binary priority on overflow, and detectContentType. Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
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✅ Development deployment succeeded! On successful deployments, you'll need to wait a moment for the bot to fully boot up AND refresh/reload your Discord client if you see a message about invalid integration ID. Thanks! |
Adds a new
1984module that logs every message activity and voice-channel event across all visible channels to a single configured audit channel.What's logged
Edits render as a unified diff inside a
```difffenced block. Full before/after/diff are also attached as files for completeness.Discord API safety
A single
buildPayloadchokepoint enforces:Overflow is automatically offloaded to text attachments. Truncation is UTF-8 rune-aware so multi-byte runes (emoji / CJK) are never split.
Edge cases handled
MESSAGE_UPDATEis a partial payload: requiresEditedTimestamp != niland falls back toBeforeUpdate.Authorwhen the payload omits it (avoids false "content cleared" entries from embed unfurls).CHANNEL_UPDATEis also partial: requires a cachedBeforeUpdateto confirm an actual rename before logging.Configuration
New config key:
gamerpals_1984_log_channel_id(accessor + example yaml +/config list-keysentry).Module is wired in
bot.gowithsession.State.MaxMessageCount = 500so discordgo populatesBeforeUpdate/BeforeDeletefrom cache.Testing
Table-driven tests at ~94% coverage including:
MESSAGE_UPDATEandCHANNEL_UPDATELocal
go build,go vet,go test ./...all pass.