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378 lines
8.6 KiB
378 lines
8.6 KiB
package jdr
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import(
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"html/template"
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"log"
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"errors"
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"strings"
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"strconv"
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"regexp"
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)
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var regexp_d = regexp.MustCompile(`^[1-9][0-9]*d([468]|1[02]|20|100)$`)
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type VariableType interface {
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Name() string
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Validate(value string) bool
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ToHTML(value string) (template.HTML, error)
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DefaultValue() string
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}
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type VariableType_badType struct {}
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func (*VariableType_badType) Name() string {
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return "unknown type"
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}
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func (*VariableType_badType) Validate(s string) bool {
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return false
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}
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func (*VariableType_badType) ToHTML(value string) (template.HTML, error) {
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return template.HTML(""), errors.New("unknown type")
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}
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func (*VariableType_badType) DefaultValue() string {
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return ""
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}
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type VariableType_bool struct {}
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func (*VariableType_bool) Name() string {
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return "bool"
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}
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func (*VariableType_bool) ToBool(value string) (bool, error) {
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switch strings.ToLower(value) {
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case "true":
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return true, nil
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case "false":
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return false, nil
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default:
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return false, errors.New("unknown bool value")
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}
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}
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func (self *VariableType_bool) Validate(value string) bool {
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_, err := self.ToBool(value)
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return err == nil
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}
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func (self *VariableType_bool) ToHTML(value string) (template.HTML, error) {
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val, err := self.ToBool(value)
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if err != nil {
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return template.HTML(""), err
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}
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ret := `<input type="checkbox"`
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if(val) {
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ret += ` checked`
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}
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ret += `/>`
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return template.HTML(ret), nil
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}
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func (self *VariableType_bool) DefaultValue() string {
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return "false"
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}
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type VariableType_int struct {}
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func (*VariableType_int) Name() string {
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return "int"
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}
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func (self *VariableType_int) ToInt(value string) (int64, error) {
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return strconv.ParseInt(value, 10, 64)
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}
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func (self *VariableType_int) Validate(value string) bool {
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_, err := self.ToInt(value)
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return err == nil
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}
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func (self *VariableType_int) ToHTML(value string) (template.HTML, error) {
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val, err := self.ToInt(value)
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if err != nil {
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return template.HTML(""), err
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}
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ret := `<input type="number" step="1" value="` + strconv.FormatInt(val, 10) + `"/>`
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return template.HTML(ret), nil
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}
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func (self *VariableType_int) DefaultValue() string {
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return "0"
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}
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type VariableType_float struct {}
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func (*VariableType_float) Name() string {
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return "float"
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}
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func (*VariableType_float) ToFloat(value string) (float64, error) {
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return strconv.ParseFloat(value, 64)
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}
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func (self *VariableType_float) Validate(value string) bool {
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_, err := self.ToFloat(value)
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return err == nil
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}
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func (self *VariableType_float) ToHTML(value string) (template.HTML, error) {
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val, err := self.ToFloat(value)
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if err != nil {
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return template.HTML(""), err
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}
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ret := `<input type="number" value="` + strconv.FormatFloat(val, 'g', -1, 64) + `"/>`
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return template.HTML(ret), nil
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}
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func (self *VariableType_float) DefaultValue() string {
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return "0.0"
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}
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type VariableType_string struct {}
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func (*VariableType_string) Name() string {
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return "string"
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}
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func (*VariableType_string) Validate(s string) bool {
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return true
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}
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func (self *VariableType_string) ToHTML(value string) (template.HTML, error) {
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ret := `<input type="text" value="` + template.HTMLEscapeString(value) + `"/>`
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return template.HTML(ret), nil
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}
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func (self *VariableType_string) DefaultValue() string {
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return ""
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}
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type VariableType_d struct {}
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func (*VariableType_d) Name() string {
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return "d"
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}
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func (*VariableType_d) Validate(s string) bool {
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return regexp_d.MatchString(s)
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}
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func (self *VariableType_d) ToHTML(value string) (template.HTML, error) {
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//FIXME: non-generic version
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ret := `<input type="text" value="` + template.HTMLEscapeString(value) +`"/>`
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return template.HTML(ret), nil
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}
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func (self *VariableType_d) DefaultValue() string {
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//FIXME: non-generic version
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return ""
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}
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func makeVariableType(s string) VariableType {
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switch(strings.ToLower(s)) {
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case "bool":
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return &VariableType_bool{}
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case "int":
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return &VariableType_int{}
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case "float":
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return &VariableType_float{}
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case "string":
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return &VariableType_string{}
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case "d":
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return &VariableType_d{}
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default:
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log.Println("Unknown type:", s)
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return &VariableType_badType{}
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}
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}
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type CustomEnum struct {
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name string
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BaseType VariableType
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Values []string
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}
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func (self *CustomEnum) Name() string {
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return self.name
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}
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func (self *CustomEnum) ToId(value string) (int, error) {
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if !self.BaseType.Validate(value) {
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return 0, errors.New("Invalid value")
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}
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for i := 0; i < len(self.Values); i++ {
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if self.Values[i] == value {
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return i, nil
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}
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}
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return 0, errors.New("No such element")
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}
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func (self *CustomEnum) Validate(value string) bool {
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_, err := self.ToId(value)
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return err == nil
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}
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func (self *CustomEnum) ToHTML(value string) (template.HTML, error) {
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selectItem := value != ""
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value_id := 0
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if selectItem {
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var err error
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value_id, err = self.ToId(value)
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if err != nil {
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return template.HTML(""), err
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}
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}
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ret := `<select>`
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for i, v := range(self.Values) {
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ret += `<option`
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if selectItem && i == value_id {
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ret += ` selected`
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}
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ret += `>`
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ret += template.HTMLEscapeString(v)
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ret += `</option>`
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}
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ret += `</select>`
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return template.HTML(ret), nil
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}
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func (self *CustomEnum) DefaultValue() string {
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return ""
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}
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type CustomStruct struct {
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name string
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Variables []Variable
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}
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func (self *CustomStruct) Name() string {
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return self.name
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}
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func (self *CustomStruct) Validate(s string) bool {
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//FIXME
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log.Println("Custom struct Validate is not (yet) implemented")
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return false
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}
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func (self *CustomStruct) ToHTML(value string) (template.HTML, error) {
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//FIXME: implement
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return template.HTML(""), nil
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}
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func (self *CustomStruct) DefaultValue() string {
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//FIXME: non-generic version
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return ""
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}
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func parseCustomEnum(root xmlNode) (*CustomEnum, error) {
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customEnum := CustomEnum {}
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nameOk := false;
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typeOk := false;
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for i := 0; i < len(root.Attrs); i++ {
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attrName := root.Attrs[i].Name.Local
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attrVal := root.Attrs[i].Value
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switch attrName {
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case "name":
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nameOk = true
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customEnum.name = attrVal
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case "base-type":
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typeOk = true
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customEnum.BaseType = makeVariableType(attrVal)
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switch customEnum.BaseType.(type) {
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case *VariableType_badType:
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typeOk = false
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}
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}
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}
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if !nameOk {
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return nil, errors.New("Unnamed custom enum")
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}
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if !typeOk {
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return nil, errors.New("Bad base type for " + customEnum.Name())
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}
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for i := 0; i < len(root.Nodes); i++ {
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node := root.Nodes[i]
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switch node.XMLName.Local {
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case "value":
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value := string(node.Content)
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if customEnum.BaseType.Validate(value) {
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customEnum.Values = append(customEnum.Values, value)
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} else {
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log.Println("Cannot validate value enum \"" + value + "\" with type \"" +
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customEnum.BaseType.Name() + "\". Discarded")
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}
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}
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}
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return &customEnum, nil
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}
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func parseCustomStruct(root xmlNode) (*CustomStruct, error) {
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customType := CustomStruct{}
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nameOk := false
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for i := 0; i < len(root.Attrs); i++ {
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attrName := root.Attrs[i].Name.Local
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attrVal := root.Attrs[i].Value
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switch attrName {
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case "name":
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nameOk = true
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customType.name = attrVal
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}
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}
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if !nameOk {
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return nil, errors.New("Unnamed custom type")
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}
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return &customType, nil
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}
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func parseCustomTypes(root xmlNode) ([]VariableType, error) {
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types := []VariableType{}
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for i := 0; i < len(root.Nodes); i++ {
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node := root.Nodes[i]
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switch node.XMLName.Local {
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case "enum":
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customEnum, err := parseCustomEnum(node)
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if err != nil {
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return []VariableType{}, err
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}
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types = append(types, customEnum)
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case "type":
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customType, err := parseCustomStruct(node)
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if err != nil {
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return []VariableType{}, err
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}
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types = append(types, customType)
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default:
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return []VariableType{}, errors.New("Unknown CustomType: " + root.Nodes[i].XMLName.Local)
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}
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}
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return types, nil
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}
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