Monorepo for Tangled
appview/labels: add handlers to perform label operations
Signed-off-by: oppiliappan <me@oppi.li>
oppiliappan
(Sep 23, 2025, 11:45 AM +0100)
596cada3
59906263
+247
+240
appview/labels/labels.go
+240
appview/labels/labels.go
···
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package labels
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import (
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"context"
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"database/sql"
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"errors"
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"fmt"
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"log/slog"
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"net/http"
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"time"
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comatproto "github.com/bluesky-social/indigo/api/atproto"
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"github.com/bluesky-social/indigo/atproto/syntax"
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lexutil "github.com/bluesky-social/indigo/lex/util"
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"github.com/go-chi/chi/v5"
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"tangled.sh/tangled.sh/core/api/tangled"
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"tangled.sh/tangled.sh/core/appview/config"
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"tangled.sh/tangled.sh/core/appview/db"
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"tangled.sh/tangled.sh/core/appview/middleware"
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"tangled.sh/tangled.sh/core/appview/oauth"
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"tangled.sh/tangled.sh/core/appview/pages"
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"tangled.sh/tangled.sh/core/appview/reporesolver"
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"tangled.sh/tangled.sh/core/appview/xrpcclient"
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"tangled.sh/tangled.sh/core/eventconsumer"
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"tangled.sh/tangled.sh/core/idresolver"
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"tangled.sh/tangled.sh/core/log"
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"tangled.sh/tangled.sh/core/rbac"
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"tangled.sh/tangled.sh/core/tid"
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)
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type Labels struct {
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repoResolver *reporesolver.RepoResolver
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idResolver *idresolver.Resolver
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oauth *oauth.OAuth
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pages *pages.Pages
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db *db.DB
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logger *slog.Logger
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}
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func New(
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oauth *oauth.OAuth,
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repoResolver *reporesolver.RepoResolver,
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pages *pages.Pages,
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spindlestream *eventconsumer.Consumer,
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idResolver *idresolver.Resolver,
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db *db.DB,
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config *config.Config,
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enforcer *rbac.Enforcer,
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) *Labels {
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logger := log.New("labels")
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return &Labels{
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oauth: oauth,
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repoResolver: repoResolver,
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pages: pages,
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idResolver: idResolver,
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db: db,
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logger: logger,
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}
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}
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func (l *Labels) Router(mw *middleware.Middleware) http.Handler {
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r := chi.NewRouter()
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r.With(middleware.AuthMiddleware(l.oauth)).Put("/perform", l.PerformLabelOp)
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return r
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}
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func (l *Labels) PerformLabelOp(w http.ResponseWriter, r *http.Request) {
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user := l.oauth.GetUser(r)
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if err := r.ParseForm(); err != nil {
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l.logger.Error("failed to parse form data", "error", err)
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http.Error(w, "Invalid form data", http.StatusBadRequest)
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return
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}
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did := user.Did
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rkey := tid.TID()
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performedAt := time.Now()
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indexedAt := time.Now()
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repoAt := r.Form.Get("repo")
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subjectUri := r.Form.Get("subject")
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keys := r.Form["operand-key"]
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vals := r.Form["operand-val"]
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var labelOps []db.LabelOp
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for i := range len(keys) {
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op := r.FormValue(fmt.Sprintf("op-%d", i))
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if op == "" {
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op = string(db.LabelOperationDel)
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}
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key := keys[i]
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val := vals[i]
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labelOps = append(labelOps, db.LabelOp{
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Did: did,
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Rkey: rkey,
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Subject: syntax.ATURI(subjectUri),
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Operation: db.LabelOperation(op),
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OperandKey: key,
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OperandValue: val,
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PerformedAt: performedAt,
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IndexedAt: indexedAt,
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})
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}
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// TODO: validate the operations
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// find all the labels that this repo subscribes to
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repoLabels, err := db.GetRepoLabels(l.db, db.FilterEq("repo_at", repoAt))
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if err != nil {
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http.Error(w, "Invalid form data", http.StatusBadRequest)
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return
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}
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var labelAts []string
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for _, rl := range repoLabels {
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labelAts = append(labelAts, rl.LabelAt.String())
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}
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actx, err := db.NewLabelApplicationCtx(l.db, db.FilterIn("at_uri", labelAts))
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if err != nil {
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http.Error(w, "Invalid form data", http.StatusBadRequest)
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return
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}
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// calculate the start state by applying already known labels
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existingOps, err := db.GetLabelOps(l.db, db.FilterEq("subject", subjectUri))
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if err != nil {
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http.Error(w, "Invalid form data", http.StatusBadRequest)
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return
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}
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labelState := db.NewLabelState()
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actx.ApplyLabelOps(labelState, existingOps)
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// next, apply all ops introduced in this request and filter out ones that are no-ops
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validLabelOps := labelOps[:0]
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for _, op := range labelOps {
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if err = actx.ApplyLabelOp(labelState, op); err != db.LabelNoOpError {
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validLabelOps = append(validLabelOps, op)
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}
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}
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// nothing to do
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if len(validLabelOps) == 0 {
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l.pages.HxRefresh(w)
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return
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}
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// create an atproto record of valid ops
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record := db.LabelOpsAsRecord(validLabelOps)
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client, err := l.oauth.AuthorizedClient(r)
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if err != nil {
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l.logger.Error("failed to create client", "error", err)
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http.Error(w, "Invalid form data", http.StatusBadRequest)
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return
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}
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resp, err := client.RepoPutRecord(r.Context(), &comatproto.RepoPutRecord_Input{
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Collection: tangled.LabelOpNSID,
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Repo: did,
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Rkey: rkey,
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Record: &lexutil.LexiconTypeDecoder{
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Val: &record,
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},
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})
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if err != nil {
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l.logger.Error("failed to write to PDS", "error", err)
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http.Error(w, "failed to write to PDS", http.StatusInternalServerError)
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return
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}
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atUri := resp.Uri
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tx, err := l.db.BeginTx(r.Context(), nil)
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if err != nil {
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l.logger.Error("failed to start tx", "error", err)
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return
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}
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rollback := func() {
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err1 := tx.Rollback()
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err2 := rollbackRecord(context.Background(), atUri, client)
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// ignore txn complete errors, this is okay
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if errors.Is(err1, sql.ErrTxDone) {
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err1 = nil
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}
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if errs := errors.Join(err1, err2); errs != nil {
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return
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}
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}
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defer rollback()
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for _, o := range validLabelOps {
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if _, err := db.AddLabelOp(l.db, &o); err != nil {
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l.logger.Error("failed to add op", "err", err)
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return
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}
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l.logger.Info("performed label op", "did", o.Did, "rkey", o.Rkey, "kind", o.Operation, "subjcet", o.Subject, "key", o.OperandKey)
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}
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err = tx.Commit()
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if err != nil {
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return
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}
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// clear aturi when everything is successful
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atUri = ""
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l.pages.HxRefresh(w)
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}
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// this is used to rollback changes made to the PDS
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//
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// it is a no-op if the provided ATURI is empty
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func rollbackRecord(ctx context.Context, aturi string, xrpcc *xrpcclient.Client) error {
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if aturi == "" {
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return nil
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}
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parsed := syntax.ATURI(aturi)
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collection := parsed.Collection().String()
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repo := parsed.Authority().String()
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rkey := parsed.RecordKey().String()
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_, err := xrpcc.RepoDeleteRecord(ctx, &comatproto.RepoDeleteRecord_Input{
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Collection: collection,
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Repo: repo,
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Rkey: rkey,
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})
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return err
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}
+7
appview/state/router.go
+7
appview/state/router.go
···
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"github.com/gorilla/sessions"
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"tangled.org/core/appview/issues"
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"tangled.org/core/appview/knots"
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"tangled.org/core/appview/labels"
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"tangled.org/core/appview/middleware"
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oauthhandler "tangled.org/core/appview/oauth/handler"
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"tangled.org/core/appview/pipelines"
···
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r.Mount("/issues", s.IssuesRouter(mw))
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r.Mount("/pulls", s.PullsRouter(mw))
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r.Mount("/pipelines", s.PipelinesRouter(mw))
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r.Mount("/labels", s.LabelsRouter(mw))
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// These routes get proxied to the knot
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r.Get("/info/refs", s.InfoRefs)
···
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func (s *State) PipelinesRouter(mw *middleware.Middleware) http.Handler {
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pipes := pipelines.New(s.oauth, s.repoResolver, s.pages, s.spindlestream, s.idResolver, s.db, s.config, s.enforcer)
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return pipes.Router(mw)
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}
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func (s *State) LabelsRouter(mw *middleware.Middleware) http.Handler {
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ls := labels.New(s.oauth, s.repoResolver, s.pages, s.spindlestream, s.idResolver, s.db, s.config, s.enforcer)
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return ls.Router(mw)
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}
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func (s *State) SignupRouter() http.Handler {