forked from ungerik/go-start
/
linkmodel.go
108 lines (91 loc) · 2.5 KB
/
linkmodel.go
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package view
import (
"fmt"
"reflect"
)
type LinkModel interface {
URL
LinkContent(ctx *Context) View
LinkTitle(ctx *Context) string
LinkRel(ctx *Context) string
}
func NewLinkModel(url interface{}, content ...interface{}) LinkModel {
getContent := func() View {
if len(content) == 0 {
return nil
}
return NewViews(content...)
}
getContentString := func() string {
if len(content) == 0 {
return ""
}
switch s := content[0].(type) {
case string:
return s
case fmt.Stringer:
return s.String()
}
return ""
}
switch s := url.(type) {
case **Page:
return &PageLink{Page: s, Content: getContent(), Title: getContentString()}
case *ViewWithURL:
return &URLLink{Url: IndirectViewWithURL(s), Content: NewViews(content...), Title: getContentString()}
case LinkModel:
if len(content) > 0 {
return &URLLink{Url: s, Content: NewViews(content...), Title: getContentString()}
}
return s
case URL:
return &URLLink{Url: s, Content: getContent(), Title: getContentString()}
case fmt.Stringer:
return &StringLink{Url: s.String(), Content: getContent(), Title: getContentString()}
}
v := reflect.ValueOf(url)
if v.Kind() != reflect.String {
panic(fmt.Errorf("Invalid type for url: %T", url))
}
return &StringLink{Url: v.String(), Content: getContent(), Title: getContentString()}
}
func NewLinkModelRel(url interface{}, rel string, content ...interface{}) LinkModel {
getContent := func() View {
if len(content) == 0 {
return nil
}
return NewViews(content...)
}
getContentString := func() string {
if len(content) == 0 {
return ""
}
switch s := content[0].(type) {
case string:
return s
case fmt.Stringer:
return s.String()
}
return ""
}
switch s := url.(type) {
case **Page:
return &PageLink{Page: s, Content: getContent(), Rel: rel, Title: getContentString()}
case *ViewWithURL:
return &URLLink{Url: IndirectViewWithURL(s), Content: NewViews(content...), Rel: rel, Title: getContentString()}
case LinkModel:
if len(content) > 0 {
return &URLLink{Url: s, Content: NewViews(content...), Rel: rel, Title: getContentString()}
}
return s
case URL:
return &URLLink{Url: s, Content: getContent(), Rel: rel, Title: getContentString()}
case fmt.Stringer:
return &StringLink{Url: s.String(), Content: getContent(), Rel: rel, Title: getContentString()}
}
v := reflect.ValueOf(url)
if v.Kind() != reflect.String {
panic(fmt.Errorf("Invalid type for url: %T", url))
}
return &StringLink{Url: v.String(), Content: getContent(), Rel: rel}
}