wip: the presets API's shape, answering nothing yet

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>

internal/control/adminapi/api.go

@@ -166,6 +166,7 @@ func (a *API) Register(mux Mux) {
 		}
 		writeJSON(w, http.StatusOK, t)
 	})
+	a.registerPresets(mux)
 	mux.HandleFunc("GET /api/v1/models", a.listModels)
 	mux.HandleFunc("GET /api/v1/replicas", a.listReplicas)
 	// Listing is a read and deleting is a separate verb, so a mistyped

internal/control/adminapi/presets.go

@@ -0,0 +1,114 @@
+package adminapi
+
+import (
+	"context"
+	"encoding/json"
+	"errors"
+	"net/http"
+	"time"
+
+	"gitea.mynodes.xyz/ilker/llmgw/internal/control/catalog"
+)
+
+// PresetsView is the models that come with llmgw, and whether the leader adds
+// them by itself.
+type PresetsView struct {
+	// Auto is whether a preset is added when a node fits it and the catalog
+	// has no model that makes what it makes (presets.auto).
+	Auto    bool         `json:"auto"`
+	Presets []PresetView `json:"presets"`
+}
+
+// PresetView is one preset as it stands in this cluster.
+type PresetView struct {
+	Name        string          `json:"name"`
+	Makes       string          `json:"makes"`
+	Description string          `json:"description"`
+	Card        string          `json:"card"`
+	Licence     catalog.License `json:"licence"`
+	// Fits is whether some node has a card that meets the preset's need;
+	// FitsClasses names those classes.
+	Fits        bool     `json:"fits"`
+	FitsClasses []string `json:"fits_classes,omitempty"`
+	InCatalog   bool     `json:"in_catalog"`
+	// AddedBy is "auto" when the leader added it, who did otherwise, ""
+	// when it was not added as a preset; AddedAt is when.
+	AddedBy string    `json:"added_by,omitempty"`
+	AddedAt time.Time `json:"added_at,omitzero"`
+	// Declined is whether somebody removed it after it was added, so it is
+	// not added again by itself; adding it again clears that.
+	Declined bool `json:"declined"`
+}
+
+// PresetsAutoRequest turns the automatic adding of presets on or off.
+type PresetsAutoRequest struct {
+	On bool `json:"on"`
+}
+
+// errPresetsUnavailable is a control plane without the store presets are
+// kept in.
+var errPresetsUnavailable = errors.New("this control plane has no store, so presets cannot be added here")
+
+// Presets is the presets as they stand in this cluster.
+func (a *API) Presets(ctx context.Context) (PresetsView, error) {
+	return PresetsView{}, errPresetsUnavailable
+}
+
+// AddPreset adds the preset of that name, and clears its decline.
+func (a *API) AddPreset(ctx context.Context, name, by string) error {
+	return errPresetsUnavailable
+}
+
+// SetAutoPresets turns presets.auto on or off.
+func (a *API) SetAutoPresets(ctx context.Context, on bool, by string) error {
+	return errPresetsUnavailable
+}
+
+func (a *API) registerPresets(mux Mux) {
+	mux.HandleFunc("GET /api/v1/presets", func(w http.ResponseWriter, r *http.Request) {
+		v, err := a.Presets(r.Context())
+		if err != nil {
+			writeError(w, presetStatus(err), err.Error())
+			return
+		}
+		writeJSON(w, http.StatusOK, v)
+	})
+	mux.HandleFunc("POST /api/v1/presets/{name}", func(w http.ResponseWriter, r *http.Request) {
+		if err := a.AddPreset(r.Context(), r.PathValue("name"), actorOf(r)); err != nil {
+			writeError(w, presetStatus(err), err.Error())
+			return
+		}
+		writeJSON(w, http.StatusOK, ModelAdded{Added: r.PathValue("name")})
+	})
+	mux.HandleFunc("PUT /api/v1/presets/auto", func(w http.ResponseWriter, r *http.Request) {
+		var req PresetsAutoRequest
+		if err := json.NewDecoder(r.Body).Decode(&req); err != nil {
+			writeError(w, http.StatusBadRequest, err.Error())
+			return
+		}
+		if err := a.SetAutoPresets(r.Context(), req.On, actorOf(r)); err != nil {
+			writeError(w, presetStatus(err), err.Error())
+			return
+		}
+		v, err := a.Presets(r.Context())
+		if err != nil {
+			writeError(w, presetStatus(err), err.Error())
+			return
+		}
+		writeJSON(w, http.StatusOK, v)
+	})
+}
+
+// errNoSuchPreset is a name no preset has.
+var errNoSuchPreset = errors.New("no preset of that name")
+
+func presetStatus(err error) int {
+	switch {
+	case errors.Is(err, errPresetsUnavailable):
+		return http.StatusNotImplemented
+	case errors.Is(err, errNoSuchPreset):
+		return http.StatusNotFound
+	default:
+		return http.StatusBadRequest
+	}
+}

internal/control/adminapi/routes.go

@@ -65,6 +65,7 @@ type Param struct {
 // before them and their name.
 var PathParams = map[string]string{
 	"models/{name}":     "The model's name in the catalog.",
+	"presets/{name}":    "The preset's name, as `llmgw ctl model presets` lists it.",
 	"nodes/{id}":        "The node's ID, as `llmgw ctl nodes` lists it.",
 	"jobs/{id}":         "The job's ID, as starting it answered.",
 	"runs/{id}":         "The quality run's ID, as starting it answered.",
@@ -136,6 +137,12 @@ var Routes = []Route{
 		Request: CollectRequest{}, OptionalBody: true, Response: []CollectResult{}},
 
 	// The catalog.
+	{Method: "GET", Path: "/api/v1/presets", Summary: "The models that come with llmgw: whether each fits this cluster, is in the catalog, was declined",
+		Response: PresetsView{}},
+	{Method: "POST", Path: "/api/v1/presets/{name}", Summary: "Add a preset to the catalog, and clear its decline",
+		Response: ModelAdded{}},
+	{Method: "PUT", Path: "/api/v1/presets/auto", Summary: "Turn on or off the adding of presets when a node fits them",
+		Request: PresetsAutoRequest{}, Response: PresetsView{}},
 	{Method: "GET", Path: "/api/v1/models", Summary: "Every model, with its replicas and state",
 		Response: []ModelView{}},
 	{Method: "POST", Path: "/api/v1/models", Summary: "Add a model to the catalog",