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rui/datePicker.go

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package rui
import (
"fmt"
"strconv"
"strings"
"time"
)
const (
DateChangedEvent = "date-changed"
DatePickerMin = "date-picker-min"
DatePickerMax = "date-picker-max"
DatePickerStep = "date-picker-step"
DatePickerValue = "date-picker-value"
dateFormat = "2006-01-02"
)
// DatePicker - DatePicker view
type DatePicker interface {
View
}
type datePickerData struct {
viewData
dateChangedListeners []func(DatePicker, time.Time)
}
// NewDatePicker create new DatePicker object and return it
func NewDatePicker(session Session, params Params) DatePicker {
view := new(datePickerData)
view.init(session)
setInitParams(view, params)
return view
}
func newDatePicker(session Session) View {
return NewDatePicker(session, nil)
}
func (picker *datePickerData) init(session Session) {
picker.viewData.init(session)
picker.tag = "DatePicker"
picker.dateChangedListeners = []func(DatePicker, time.Time){}
}
func (picker *datePickerData) String() string {
return getViewString(picker)
}
func (picker *datePickerData) Focusable() bool {
return true
}
func (picker *datePickerData) normalizeTag(tag string) string {
tag = strings.ToLower(tag)
switch tag {
case Type, Min, Max, Step, Value:
return "date-picker-" + tag
}
return tag
}
func (picker *datePickerData) Remove(tag string) {
picker.remove(picker.normalizeTag(tag))
}
func (picker *datePickerData) remove(tag string) {
switch tag {
case DateChangedEvent:
if len(picker.dateChangedListeners) > 0 {
picker.dateChangedListeners = []func(DatePicker, time.Time){}
picker.propertyChangedEvent(tag)
}
return
case DatePickerMin:
delete(picker.properties, DatePickerMin)
if picker.created {
removeProperty(picker.htmlID(), Min, picker.session)
}
case DatePickerMax:
delete(picker.properties, DatePickerMax)
if picker.created {
removeProperty(picker.htmlID(), Max, picker.session)
}
case DatePickerStep:
delete(picker.properties, DatePickerStep)
if picker.created {
removeProperty(picker.htmlID(), Step, picker.session)
}
case DatePickerValue:
if _, ok := picker.properties[DatePickerValue]; ok {
delete(picker.properties, DatePickerValue)
date := GetDatePickerValue(picker)
if picker.created {
picker.session.runScript(fmt.Sprintf(`setInputValue('%s', '%s')`, picker.htmlID(), date.Format(dateFormat)))
}
for _, listener := range picker.dateChangedListeners {
listener(picker, date)
}
} else {
return
}
default:
picker.viewData.remove(tag)
return
}
picker.propertyChangedEvent(tag)
}
func (picker *datePickerData) Set(tag string, value any) bool {
return picker.set(picker.normalizeTag(tag), value)
}
func (picker *datePickerData) set(tag string, value any) bool {
if value == nil {
picker.remove(tag)
return true
}
setTimeValue := func(tag string) (time.Time, bool) {
switch value := value.(type) {
case time.Time:
picker.properties[tag] = value
return value, true
case string:
if text, ok := picker.Session().resolveConstants(value); ok {
format := "20060102"
if strings.ContainsRune(text, '-') {
if part := strings.Split(text, "-"); len(part) == 3 {
if part[0] != "" && part[0][0] > '9' {
if len(part[2]) == 2 {
format = "Jan-02-06"
} else {
format = "Jan-02-2006"
}
} else if part[1] != "" && part[1][0] > '9' {
format = "02-Jan-2006"
} else {
format = "2006-01-02"
}
}
} else if strings.ContainsRune(text, ' ') {
if part := strings.Split(text, " "); len(part) == 3 {
if part[0] != "" && part[0][0] > '9' {
format = "January 02, 2006"
} else {
format = "02 January 2006"
}
}
} else if strings.ContainsRune(text, '/') {
if part := strings.Split(text, "/"); len(part) == 3 {
if len(part[2]) == 2 {
format = "01/02/06"
} else {
format = "01/02/2006"
}
}
} else if len(text) == 6 {
format = "010206"
}
if date, err := time.Parse(format, text); err == nil {
picker.properties[tag] = value
return date, true
}
}
}
notCompatibleType(tag, value)
return time.Now(), false
}
switch tag {
case DatePickerMin:
old, oldOK := getDateProperty(picker, DatePickerMin, Min)
if date, ok := setTimeValue(DatePickerMin); ok {
if !oldOK || date != old {
if picker.created {
updateProperty(picker.htmlID(), Min, date.Format(dateFormat), picker.session)
}
picker.propertyChangedEvent(tag)
}
return true
}
case DatePickerMax:
old, oldOK := getDateProperty(picker, DatePickerMax, Max)
if date, ok := setTimeValue(DatePickerMax); ok {
if !oldOK || date != old {
if picker.created {
updateProperty(picker.htmlID(), Max, date.Format(dateFormat), picker.session)
}
picker.propertyChangedEvent(tag)
}
return true
}
case DatePickerStep:
oldStep := GetDatePickerStep(picker)
if picker.setIntProperty(DatePickerStep, value) {
if step := GetDatePickerStep(picker); oldStep != step {
if picker.created {
if step > 0 {
updateProperty(picker.htmlID(), Step, strconv.Itoa(step), picker.session)
} else {
removeProperty(picker.htmlID(), Step, picker.session)
}
}
picker.propertyChangedEvent(tag)
}
return true
}
case DatePickerValue:
oldDate := GetDatePickerValue(picker)
if date, ok := setTimeValue(DatePickerValue); ok {
if date != oldDate {
if picker.created {
picker.session.runScript(fmt.Sprintf(`setInputValue('%s', '%s')`, picker.htmlID(), date.Format(dateFormat)))
}
for _, listener := range picker.dateChangedListeners {
listener(picker, date)
}
picker.propertyChangedEvent(tag)
}
return true
}
case DateChangedEvent:
listeners, ok := valueToEventListeners[DatePicker, time.Time](value)
if !ok {
notCompatibleType(tag, value)
return false
} else if listeners == nil {
listeners = []func(DatePicker, time.Time){}
}
picker.dateChangedListeners = listeners
picker.propertyChangedEvent(tag)
return true
default:
return picker.viewData.set(tag, value)
}
return false
}
func (picker *datePickerData) Get(tag string) any {
return picker.get(picker.normalizeTag(tag))
}
func (picker *datePickerData) get(tag string) any {
switch tag {
case DateChangedEvent:
return picker.dateChangedListeners
default:
return picker.viewData.get(tag)
}
}
func (picker *datePickerData) htmlTag() string {
return "input"
}
func (picker *datePickerData) htmlProperties(self View, buffer *strings.Builder) {
picker.viewData.htmlProperties(self, buffer)
buffer.WriteString(` type="date"`)
if min, ok := getDateProperty(picker, DatePickerMin, Min); ok {
buffer.WriteString(` min="`)
buffer.WriteString(min.Format(dateFormat))
buffer.WriteByte('"')
}
if max, ok := getDateProperty(picker, DatePickerMax, Max); ok {
buffer.WriteString(` max="`)
buffer.WriteString(max.Format(dateFormat))
buffer.WriteByte('"')
}
if step, ok := intProperty(picker, DatePickerStep, picker.Session(), 0); ok && step > 0 {
buffer.WriteString(` step="`)
buffer.WriteString(strconv.Itoa(step))
buffer.WriteByte('"')
}
buffer.WriteString(` value="`)
buffer.WriteString(GetDatePickerValue(picker).Format(dateFormat))
buffer.WriteByte('"')
buffer.WriteString(` oninput="editViewInputEvent(this)"`)
if picker.getRaw(ClickEvent) == nil {
buffer.WriteString(` onclick="stopEventPropagation(this, event)"`)
}
}
func (picker *datePickerData) htmlDisabledProperties(self View, buffer *strings.Builder) {
if IsDisabled(self) {
buffer.WriteString(` disabled`)
}
picker.viewData.htmlDisabledProperties(self, buffer)
}
func (picker *datePickerData) handleCommand(self View, command string, data DataObject) bool {
switch command {
case "textChanged":
if text, ok := data.PropertyValue("text"); ok {
if value, err := time.Parse(dateFormat, text); err == nil {
oldValue := GetDatePickerValue(picker)
picker.properties[DatePickerValue] = value
if value != oldValue {
for _, listener := range picker.dateChangedListeners {
listener(picker, value)
}
}
}
}
return true
}
return picker.viewData.handleCommand(self, command, data)
}
func getDateProperty(view View, mainTag, shortTag string) (time.Time, bool) {
valueToTime := func(value any) (time.Time, bool) {
if value != nil {
switch value := value.(type) {
case time.Time:
return value, true
case string:
if text, ok := view.Session().resolveConstants(value); ok {
if result, err := time.Parse(dateFormat, text); err == nil {
return result, true
}
}
}
}
return time.Now(), false
}
if view != nil {
if result, ok := valueToTime(view.getRaw(mainTag)); ok {
return result, true
}
if value := valueFromStyle(view, shortTag); value != nil {
if result, ok := valueToTime(value); ok {
return result, true
}
}
}
return time.Now(), false
}
// GetDatePickerMin returns the min date of DatePicker subview and "true" as the second value if the min date is set,
// "false" as the second value otherwise.
// If the second argument (subviewID) is not specified or it is "" then a value from the first argument (view) is returned.
func GetDatePickerMin(view View, subviewID ...string) (time.Time, bool) {
if len(subviewID) > 0 && subviewID[0] != "" {
view = ViewByID(view, subviewID[0])
}
if view != nil {
return getDateProperty(view, DatePickerMin, Min)
}
return time.Now(), false
}
// GetDatePickerMax returns the max date of DatePicker subview and "true" as the second value if the min date is set,
// "false" as the second value otherwise.
// If the second argument (subviewID) is not specified or it is "" then a value from the first argument (view) is returned.
func GetDatePickerMax(view View, subviewID ...string) (time.Time, bool) {
if len(subviewID) > 0 && subviewID[0] != "" {
view = ViewByID(view, subviewID[0])
}
if view != nil {
return getDateProperty(view, DatePickerMax, Max)
}
return time.Now(), false
}
// GetDatePickerStep returns the date changing step in days of DatePicker subview.
// If the second argument (subviewID) is not specified or it is "" then a value from the first argument (view) is returned.
func GetDatePickerStep(view View, subviewID ...string) int {
return intStyledProperty(view, subviewID, DatePickerStep, 0)
}
// GetDatePickerValue returns the date of DatePicker subview.
// If the second argument (subviewID) is not specified or it is "" then a value from the first argument (view) is returned.
func GetDatePickerValue(view View, subviewID ...string) time.Time {
if len(subviewID) > 0 && subviewID[0] != "" {
view = ViewByID(view, subviewID[0])
}
if view == nil {
return time.Now()
}
date, _ := getDateProperty(view, DatePickerValue, Value)
return date
}
// GetDateChangedListeners returns the DateChangedListener list of an DatePicker subview.
// If there are no listeners then the empty list is returned
// If the second argument (subviewID) is not specified or it is "" then a value from the first argument (view) is returned.
func GetDateChangedListeners(view View, subviewID ...string) []func(DatePicker, time.Time) {
return getEventListeners[DatePicker, time.Time](view, subviewID, DateChangedEvent)
}