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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,154 @@ | ||
| package feedback | ||
|
|
||
| import ( | ||
| "context" | ||
| _ "embed" // for templates | ||
| "errors" | ||
| "fmt" | ||
| "html/template" | ||
| "net/http" | ||
|
|
||
| "github.com/dkotik/htadaptor" | ||
| "github.com/nicksnyder/go-i18n/v2/i18n" | ||
| ) | ||
|
|
||
| //go:embed form.htmx | ||
| var htmx string | ||
|
|
||
| var templates = template.Must(template.New("htmx").Parse(htmx)) | ||
|
|
||
| type formRequest struct { | ||
| Letter // embed letter to defer validation handler function | ||
| } | ||
|
|
||
| func (r *formRequest) Validate(ctx context.Context) error { | ||
| // do nothing, because Letter validation | ||
| // will be performed inside the handler function | ||
| // because HTMX will render the error together with | ||
| // the rest of the response | ||
| return nil | ||
| } | ||
|
|
||
| type formResponse struct { | ||
| Letter // embed request to inject form values into form | ||
| Sent bool | ||
| Localizer *i18n.Localizer | ||
| Error error | ||
| } | ||
|
|
||
| func (f *formResponse) Title() (string, error) { | ||
| return f.Localizer.Localize(&i18n.LocalizeConfig{ | ||
| DefaultMessage: &i18n.Message{ | ||
| ID: "PageTitle", | ||
| Other: "Provide Feedback", | ||
| }, | ||
| }) | ||
| } | ||
|
|
||
| func (f *formResponse) NameLabel() (string, error) { | ||
| return f.Letter.nameLabel(f.Localizer) | ||
| } | ||
|
|
||
| func (f *formResponse) PhoneLabel() (string, error) { | ||
|
|
||
| return f.Letter.phoneLabel(f.Localizer) | ||
| } | ||
|
|
||
| func (f *formResponse) EmailLabel() (string, error) { | ||
|
|
||
| return f.Letter.emailLabel(f.Localizer) | ||
| } | ||
|
|
||
| func (f *formResponse) MessageLabel() (string, error) { | ||
| return f.Letter.messageLabel(f.Localizer) | ||
| } | ||
|
|
||
| func (f *formResponse) SendLabel() (string, error) { | ||
| return f.Localizer.Localize(&i18n.LocalizeConfig{ | ||
| DefaultMessage: &i18n.Message{ | ||
| ID: "Send", | ||
| Other: "Send", | ||
| }, | ||
| }) | ||
| } | ||
|
|
||
| func (f *formResponse) Success() (string, error) { | ||
| return f.Localizer.Localize(&i18n.LocalizeConfig{ | ||
| DefaultMessage: &i18n.Message{ | ||
| ID: "Sent", | ||
| Other: "Thank you! We will follow up with you soon.", | ||
| }, | ||
| }) | ||
| } | ||
|
|
||
| type formHandler struct { | ||
| get http.Handler | ||
| post http.Handler | ||
| } | ||
|
|
||
| func (h *formHandler) ServeHTTP(w http.ResponseWriter, r *http.Request) { | ||
| switch r.Method { | ||
| case http.MethodGet: | ||
| h.get.ServeHTTP(w, r) | ||
| case http.MethodPost: | ||
| h.post.ServeHTTP(w, r) | ||
| default: | ||
| h.get.ServeHTTP(w, r) | ||
| } | ||
| } | ||
|
|
||
| func New(sender Sender) (http.Handler, error) { | ||
| if sender == nil { | ||
| return nil, errors.New("cannot use a <nil> feedback sender") | ||
| } | ||
|
|
||
| get, err := htadaptor.NewNullaryFuncAdaptor( | ||
| func(ctx context.Context) (*formResponse, error) { | ||
| // localizer is passed through context using | ||
| // acceptlanguage middleware all the same | ||
| l, ok := htadaptor.LocalizerFromContext(ctx) | ||
| if !ok { | ||
| return nil, errors.New("there is no localizer in context") | ||
| } | ||
| return &formResponse{ | ||
| Localizer: l, | ||
| }, nil | ||
| }, | ||
| htadaptor.WithTemplate(templates.Lookup("page")), | ||
| ) | ||
| if err != nil { | ||
| return nil, fmt.Errorf("unable to create get handler: %w", err) | ||
| } | ||
|
|
||
| post, err := htadaptor.NewUnaryFuncAdaptor( | ||
| func(ctx context.Context, r *formRequest) (*formResponse, error) { | ||
| // localizer is passed through context using | ||
| // acceptlanguage middleware | ||
| l, ok := htadaptor.LocalizerFromContext(ctx) | ||
| if !ok { | ||
| return nil, errors.New("there is no localizer in context") | ||
| } | ||
| f := &formResponse{ | ||
| Letter: r.Letter, | ||
| Localizer: l, | ||
| } | ||
| if f.Error = r.Letter.ValidateWithLocale(l); f.Error != nil { | ||
| return f, nil | ||
| } | ||
| f.Error = sender(ctx, &r.Letter) | ||
| if f.Error == nil { | ||
| f.Sent = true | ||
| } | ||
| return f, nil | ||
| }, | ||
| htadaptor.WithTemplate(templates.Lookup("form")), | ||
| ) | ||
| if err != nil { | ||
| return nil, fmt.Errorf("unable to create post handler: %w", err) | ||
| } | ||
|
|
||
| return &formHandler{ | ||
| get: get, | ||
| post: post, | ||
| }, nil | ||
| } |
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