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form.go
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form.go
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package editor
import (
"bytes"
"fmt"
"github.com/fanky5g/ponzu/config"
"github.com/fanky5g/ponzu/content/item"
"strings"
)
type Tab struct {
Name string
Icon string
ClassNames []string
Content []byte
}
func getTabIdentifier(name string) string {
return strings.ToLower(name)
}
func getTabContent(tab Tab) string {
return fmt.Sprintf(
`<div id="%s" class="col s12 card-content %s">%s</div>`,
getTabIdentifier(tab.Name),
strings.Join(tab.ClassNames, " "),
string(tab.Content),
)
}
// Form takes editable entities and any number of Field funcs to describe the edit
// page for any entities struct added by a user
func Form(post Editable, paths config.Paths, fields ...Field) ([]byte, error) {
viewBuf := &bytes.Buffer{}
tabs, err := getTabs(post, fields)
if err != nil {
return nil, err
}
if len(tabs) == 0 {
return nil, nil
}
if len(tabs) == 1 {
tab := tabs[0]
_, err = viewBuf.WriteString(fmt.Sprintf(`<div class="row">%s`, getTabContent(tab)))
if err != nil {
return nil, fmt.Errorf("failed to write HTML string to editor Form buffer: %v", err)
}
} else {
_, err = viewBuf.WriteString(`<div class="row"><div class="col s12"><ul class="tabs">`)
if err != nil {
return nil, fmt.Errorf("failed to write HTML string to editor Form buffer: %v", err)
}
// write tab header
for _, tab := range tabs {
_, err = viewBuf.WriteString(fmt.Sprintf(`
<li class="tab col s3"><a href="#%s"><i class="material-icons">%s</i>%s</a></li>`,
getTabIdentifier(tab.Name),
tab.Icon,
tab.Name,
))
if err != nil {
return nil, fmt.Errorf("failed to write HTML string to editor Form buffer: %v", err)
}
}
// tab header closing tag
_, err = viewBuf.WriteString(`</ul></div>`)
if err != nil {
return nil, fmt.Errorf("failed to write HTML string to editor Form buffer: %v", err)
}
// write content
for _, tab := range tabs {
_, err = viewBuf.WriteString(getTabContent(tab))
if err != nil {
return nil, fmt.Errorf("failed to write HTML string to editor Form buffer: %v", err)
}
}
}
script := &bytes.Buffer{}
scriptTmpl := makeScript("editor")
if err = scriptTmpl.Execute(script, paths); err != nil {
panic(err)
}
editorControls := makeHtml("editor_controls")
_, err = viewBuf.WriteString(editorControls + script.String() + `</div>`)
if err != nil {
return nil, fmt.Errorf("failed to write HTML string to editor Form buffer: %v", err)
}
return viewBuf.Bytes(), nil
}
func getTabs(e Editable, contentFields []Field) ([]Tab, error) {
tabs := make([]Tab, 0)
if len(contentFields) > 0 {
contentTab, err := getContentTab(contentFields)
if err != nil {
return nil, err
}
if contentTab != nil {
tabs = append(tabs, *contentTab)
}
}
properties, err := getPropertiesTab(e)
if err != nil {
return nil, err
}
if properties != nil {
tabs = append(tabs, *properties)
}
return tabs, nil
}
func getContentTab(fields []Field) (*Tab, error) {
viewBuf := &bytes.Buffer{}
for _, f := range fields {
_, err := viewBuf.Write(f.View)
if err != nil {
return nil, fmt.Errorf("error writing field view to editor view buffer: %v", err)
}
}
return &Tab{
Name: "Edit",
Icon: "edit",
Content: viewBuf.Bytes(),
ClassNames: []string{"editor-content"},
}, nil
}
func getPropertiesTab(e Editable) (*Tab, error) {
properties := getDefaultFields(e)
if len(properties) == 0 {
return nil, nil
}
viewBuf := &bytes.Buffer{}
for _, f := range properties {
_, err := viewBuf.Write(f.View)
if err != nil {
return nil, fmt.Errorf("error writing field view to editor view buffer: %v", err)
}
}
_, err := viewBuf.WriteString(makeHtml("editor_timestamp"))
if err != nil {
return nil, fmt.Errorf("error writing field view to editor view buffer: %v", err)
}
return &Tab{
Name: "Properties",
Icon: "tune",
Content: viewBuf.Bytes(),
ClassNames: []string{"editor-metadata"},
}, nil
}
// Default fields (properties) are system generated, and mostly non-editable. Most system entities that do not
// have properties by default. E.g. System Configuration entities. As such, we only render properties
// for existing entities that already have these properties. This
// allows us to omit rendering properties unnecessarily for auto-generated system entities.
func getDefaultFields(e Editable) []Field {
iface := (interface{})(e)
properties := make([]Field, 0)
if sluggable, ok := iface.(item.Sluggable); ok {
if sluggable.ItemSlug() != "" {
properties = append(properties, Field{
View: Input("Slug", e, map[string]string{
"label": "URL Slug",
"type": "text",
"disabled": "true",
"placeholder": "Will be set automatically",
}, nil),
})
}
}
if sortable, ok := iface.(item.Sortable); ok {
if sortable.Time() != 0 {
properties = append(properties, []Field{
{
View: Timestamp("Timestamp", e, map[string]string{
"type": "hidden",
"class": "timestamp __ponzu",
}),
},
{
View: Timestamp("Updated", e, map[string]string{
"type": "hidden",
"class": "updated __ponzu",
}),
},
}...)
}
}
return properties
}