// RenderInContext - Renders compiled component from context.
// Stores result in context to be retrieved with `components.ContextRendered`.
func RenderInContext(next xhandler.HandlerC) xhandler.HandlerC {
return xhandler.HandlerFuncC(func(ctx context.Context, w http.ResponseWriter, r *http.Request) {
c, ok := components.CompiledFromContext(ctx)
if !ok {
helpers.WriteError(w, r, http.StatusBadRequest, "component not compiled")
return
}
t, _ := components.TemplateContext(ctx)
res, err := components.Render(c, t)
if err != nil {
helpers.WriteError(w, r, http.StatusExpectationFailed, fmt.Sprintf("render error: %v", err))
return
}
ctx = components.NewRenderedContext(ctx, res)
next.ServeHTTPC(ctx, w, r)
})
}
// WriteRenderedHTML - Writes rendered component from context to response writer.
func WriteRenderedHTML(ctx context.Context, w http.ResponseWriter, r *http.Request) {
res, ok := components.RenderedFromContext(ctx)
if !ok {
helpers.WriteError(w, r, http.StatusBadRequest, "component not rendered")
return
}
w.Header().Set("Content-Type", "text/html")
w.Write([]byte(res.HTML()))
}
// WriteRenderedJSON - Writes rendered component from context to response writer.
func WriteRenderedJSON(ctx context.Context, w http.ResponseWriter, r *http.Request) {
res, ok := components.RenderedFromContext(ctx)
if !ok {
helpers.WriteError(w, r, http.StatusBadRequest, "component not rendered")
return
}
w.Header().Set("Content-Type", "application/json")
if err := json.NewEncoder(w).Encode(res); err != nil {
glog.Warningf("[api] response encode error: %v", err)
}
}
// CompileInContext - Compiles component from context.
// Stores result in context to be retrieved with `components.FromContext`.
func CompileInContext(next xhandler.HandlerC) xhandler.HandlerC {
return xhandler.HandlerFuncC(func(ctx context.Context, w http.ResponseWriter, r *http.Request) {
compiled, err := compiler.Compile(ctx)
if err != nil {
helpers.WriteError(w, r, http.StatusExpectationFailed, fmt.Sprintf("compile error: %v", err))
return
}
ctx = components.NewCompiledContext(ctx, compiled)
next.ServeHTTPC(ctx, w, r)
})
}
// UnmarshalFromBody - Unmarshals component from request bodyCompileInContext() on certain methods.
// Stores result in context to be retrieved with `components.FromContext`.
func UnmarshalFromBody(methods ...string) middlewares.Handler {
return middlewares.ToHandler(func(ctx context.Context, w http.ResponseWriter, r *http.Request, next xhandler.HandlerC) {
if !helpers.Contain(methods, r.Method) {
next.ServeHTTPC(ctx, w, r)
return
}
c := new(components.Component)
err := json.NewDecoder(r.Body).Decode(c)
if err != nil {
helpers.WriteError(w, r, http.StatusBadRequest, err.Error())
return
}
ctx = components.NewContext(ctx, c)
next.ServeHTTPC(ctx, w, r)
})
}
// UnmarshalFromQuery - Unmarshals component from `json` query on certain methods.
// Stores result in context to be retrieved with `components.FromContext`.
func UnmarshalFromQuery(methods ...string) middlewares.Handler {
return middlewares.ToHandler(func(ctx context.Context, w http.ResponseWriter, r *http.Request, next xhandler.HandlerC) {
if len(methods) != 0 && !helpers.Contain(methods, r.Method) {
next.ServeHTTPC(ctx, w, r)
return
}
// Read component from request
c, err := readComponent(r)
if err != nil {
helpers.WriteError(w, r, http.StatusBadRequest, err.Error())
return
}
// Create a context with component and move to next handler
ctx = components.NewContext(ctx, c)
next.ServeHTTPC(ctx, w, r)
})
}
