ITWorx Pulse release export
bd774932d5
Public source validation / validate (push) Failing after 3m8s
69 lines
2.7 KiB
Go
69 lines
2.7 KiB
Go
// Package widgetapi exposes the bounded widget catalog and preview contract.
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package widgetapi
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import (
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"encoding/json"
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"errors"
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"io"
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"net/http"
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"strings"
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"github.com/itworx/pulse/internal/problem"
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"github.com/itworx/pulse/internal/widget"
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"github.com/itworx/pulse/internal/widgetpreview"
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)
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type Handler struct{ Registry widget.Registry }
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func (h Handler) ServeHTTP(w http.ResponseWriter, r *http.Request) {
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if err := r.Context().Err(); err != nil {
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return
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}
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switch {
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case r.URL.Path == "/api/v1/widgets/catalog" && r.Method == http.MethodGet:
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write(w, http.StatusOK, map[string]any{"items": h.Registry.Catalog()})
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case r.URL.Path == "/api/v1/widgets/preview" && r.Method == http.MethodPost:
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contentType := strings.ToLower(strings.TrimSpace(strings.Split(r.Header.Get("Content-Type"), ";")[0]))
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if contentType != "" && contentType != "application/json" {
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problem.Write(w, r, http.StatusUnsupportedMediaType, "UNSUPPORTED_MEDIA_TYPE", "Unsupported media type", "Widget previews require application/json.", nil)
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return
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}
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var body struct {
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Widget map[string]any `json:"widget"`
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State string `json:"state"`
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}
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decoder := json.NewDecoder(http.MaxBytesReader(w, r.Body, 1<<20))
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decoder.DisallowUnknownFields()
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if err := decoder.Decode(&body); err != nil || body.Widget == nil {
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problem.Write(w, r, http.StatusBadRequest, "INVALID_PREVIEW", "Invalid preview", "A bounded widget configuration is required.", nil)
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return
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}
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var trailing any
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if err := decoder.Decode(&trailing); !errors.Is(err, io.EOF) {
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problem.Write(w, r, http.StatusBadRequest, "INVALID_PREVIEW", "Invalid preview", "The request must contain one JSON document.", nil)
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return
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}
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preview, err := widgetpreview.Preview(body.Widget, body.State)
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if err != nil {
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var invalid widgetpreview.InvalidConfig
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if errors.As(err, &invalid) {
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problem.Write(w, r, http.StatusBadRequest, "INVALID_WIDGET_CONFIG", "Invalid widget", "The widget configuration is invalid.", invalid.Fields)
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return
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}
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problem.Write(w, r, http.StatusBadRequest, "INVALID_WIDGET_CONFIG", "Invalid widget", "The widget configuration is invalid.", nil)
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return
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}
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write(w, http.StatusOK, map[string]any{"preview": preview})
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case r.URL.Path == "/api/v1/widgets/catalog" || r.URL.Path == "/api/v1/widgets/preview":
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problem.Write(w, r, http.StatusMethodNotAllowed, "METHOD_NOT_ALLOWED", "Method not allowed", "The requested method is not supported for this widget route.", nil)
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default:
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problem.Write(w, r, http.StatusNotFound, "NOT_FOUND", "Not found", "The requested widget route does not exist.", nil)
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}
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}
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func write(w http.ResponseWriter, status int, value any) {
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w.Header().Set("Content-Type", "application/json")
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w.WriteHeader(status)
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_ = json.NewEncoder(w).Encode(value)
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}
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