package hugolib import ( "errors" "html" "html/template" "io" "io/ioutil" "os" "path/filepath" "reflect" "strconv" "strings" "github.com/eknkc/amber" "github.com/spf13/hugo/helpers" ) func Gt(a interface{}, b interface{}) bool { var left, right int64 av := reflect.ValueOf(a) switch av.Kind() { case reflect.Array, reflect.Chan, reflect.Map, reflect.Slice: left = int64(av.Len()) case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64: left = av.Int() case reflect.String: left, _ = strconv.ParseInt(av.String(), 10, 64) } bv := reflect.ValueOf(b) switch bv.Kind() { case reflect.Array, reflect.Chan, reflect.Map, reflect.Slice: right = int64(bv.Len()) case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64: right = bv.Int() case reflect.String: right, _ = strconv.ParseInt(bv.String(), 10, 64) } return left > right } // First is exposed to templates, to iterate over the first N items in a // rangeable list. func First(limit int, seq interface{}) (interface{}, error) { if limit < 1 { return nil, errors.New("can't return negative/empty count of items from sequence") } seqv := reflect.ValueOf(seq) // this is better than my first pass; ripped from text/template/exec.go indirect(): for ; seqv.Kind() == reflect.Ptr || seqv.Kind() == reflect.Interface; seqv = seqv.Elem() { if seqv.IsNil() { return nil, errors.New("can't iterate over a nil value") } if seqv.Kind() == reflect.Interface && seqv.NumMethod() > 0 { break } } switch seqv.Kind() { case reflect.Array, reflect.Slice, reflect.String: // okay default: return nil, errors.New("can't iterate over " + reflect.ValueOf(seq).Type().String()) } if limit > seqv.Len() { limit = seqv.Len() } return seqv.Slice(0, limit).Interface(), nil } func IsSet(a interface{}, key interface{}) bool { av := reflect.ValueOf(a) kv := reflect.ValueOf(key) switch av.Kind() { case reflect.Array, reflect.Chan, reflect.Slice: if int64(av.Len()) > kv.Int() { return true } case reflect.Map: if kv.Type() == av.Type().Key() { return av.MapIndex(kv).IsValid() } } return false } func ReturnWhenSet(a interface{}, index int) interface{} { av := reflect.ValueOf(a) switch av.Kind() { case reflect.Array, reflect.Slice: if av.Len() > index { avv := av.Index(index) switch avv.Kind() { case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64: return avv.Int() case reflect.String: return avv.String() } } } return "" } func Highlight(in interface{}, lang string) template.HTML { var str string av := reflect.ValueOf(in) switch av.Kind() { case reflect.String: str = av.String() } if strings.HasPrefix(strings.TrimSpace(str), "
") {
		str = str[strings.Index(str, "
")+11:]
	}
	if strings.HasSuffix(strings.TrimSpace(str), "
") { str = str[:strings.LastIndex(str, "
")] } return template.HTML(helpers.Highlight(html.UnescapeString(str), lang)) } func SafeHtml(text string) template.HTML { return template.HTML(text) } type Template interface { ExecuteTemplate(wr io.Writer, name string, data interface{}) error Lookup(name string) *template.Template Templates() []*template.Template New(name string) *template.Template LoadTemplates(absPath string) LoadTemplatesWithPrefix(absPath, prefix string) AddTemplate(name, tpl string) error AddInternalTemplate(prefix, name, tpl string) error AddInternalShortcode(name, tpl string) error } type templateErr struct { name string err error } type GoHtmlTemplate struct { template.Template errors []*templateErr } func NewTemplate() Template { var templates = &GoHtmlTemplate{ Template: *template.New(""), errors: make([]*templateErr, 0), } funcMap := template.FuncMap{ "urlize": helpers.Urlize, "sanitizeurl": helpers.SanitizeUrl, "gt": Gt, "isset": IsSet, "echoParam": ReturnWhenSet, "safeHtml": SafeHtml, "first": First, "highlight": Highlight, "add": func(a, b int) int { return a + b }, "sub": func(a, b int) int { return a - b }, "div": func(a, b int) int { return a / b }, "mod": func(a, b int) int { return a % b }, "mul": func(a, b int) int { return a * b }, "modBool": func(a, b int) bool { return a%b == 0 }, "lower": func(a string) string { return strings.ToLower(a) }, "upper": func(a string) string { return strings.ToUpper(a) }, "title": func(a string) string { return strings.Title(a) }, } templates.Funcs(funcMap) templates.LoadEmbedded() return templates } func (t *GoHtmlTemplate) LoadEmbedded() { t.EmbedShortcodes() t.EmbedTemplates() } func (t *GoHtmlTemplate) AddInternalTemplate(prefix, name, tpl string) error { if prefix != "" { return t.AddTemplate("_internal/"+prefix+"/"+name, tpl) } else { return t.AddTemplate("_internal/"+name, tpl) } } func (t *GoHtmlTemplate) AddInternalShortcode(name, content string) error { return t.AddInternalTemplate("shortcodes", name, content) } func (t *GoHtmlTemplate) AddTemplate(name, tpl string) error { _, err := t.New(name).Parse(tpl) if err != nil { t.errors = append(t.errors, &templateErr{name: name, err: err}) } return err } func (t *GoHtmlTemplate) AddTemplateFile(name, path string) error { b, err := ioutil.ReadFile(path) if err != nil { return err } return t.AddTemplate(name, string(b)) } func (t *GoHtmlTemplate) generateTemplateNameFrom(base, path string) string { return filepath.ToSlash(path[len(base)+1:]) } func ignoreDotFile(path string) bool { return filepath.Base(path)[0] == '.' } func (t *GoHtmlTemplate) loadTemplates(absPath string, prefix string) { walker := func(path string, fi os.FileInfo, err error) error { if err != nil { return nil } if !fi.IsDir() { if ignoreDotFile(path) { return nil } tplName := t.generateTemplateNameFrom(absPath, path) if prefix != "" { tplName = strings.Trim(prefix, "/") + "/" + tplName } // TODO move this into the AddTemplateFile function if strings.HasSuffix(path, ".amber") { compiler := amber.New() // Parse the input file if err := compiler.ParseFile(path); err != nil { return nil } if _, err := compiler.CompileWithTemplate(t.New(tplName)); err != nil { return err } } else { t.AddTemplateFile(tplName, path) } } return nil } filepath.Walk(absPath, walker) } func (t *GoHtmlTemplate) LoadTemplatesWithPrefix(absPath string, prefix string) { t.loadTemplates(absPath, prefix) } func (t *GoHtmlTemplate) LoadTemplates(absPath string) { t.loadTemplates(absPath, "") }