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) 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){} } case DatePickerMin: delete(picker.properties, DatePickerMin) removeProperty(picker.htmlID(), Min, picker.session) case DatePickerMax: delete(picker.properties, DatePickerMax) removeProperty(picker.htmlID(), Max, picker.session) case DatePickerStep: delete(picker.properties, DatePickerMax) removeProperty(picker.htmlID(), Step, picker.session) case DatePickerValue: delete(picker.properties, DatePickerValue) updateProperty(picker.htmlID(), Value, time.Now().Format(dateFormat), picker.session) default: picker.viewData.remove(tag) picker.propertyChanged(tag) } } func (picker *datePickerData) Set(tag string, value interface{}) bool { return picker.set(picker.normalizeTag(tag), value) } func (picker *datePickerData) set(tag string, value interface{}) bool { if value == nil { picker.remove(tag) return true } setTimeValue := func(tag string) (time.Time, bool) { //old, oldOK := getDateProperty(picker, tag, shortTag) switch value := value.(type) { case time.Time: picker.properties[tag] = value return value, true case string: if text, ok := picker.Session().resolveConstants(value); ok { if date, err := time.Parse(dateFormat, 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 { updateProperty(picker.htmlID(), Min, date.Format(dateFormat), picker.session) } return true } case DatePickerMax: old, oldOK := getDateProperty(picker, DatePickerMax, Max) if date, ok := setTimeValue(DatePickerMax); ok { if !oldOK || date != old { updateProperty(picker.htmlID(), Max, date.Format(dateFormat), picker.session) } return true } case DatePickerStep: oldStep := GetDatePickerStep(picker, "") if picker.setIntProperty(DatePickerStep, value) { step := GetDatePickerStep(picker, "") if oldStep != step { if step > 0 { updateProperty(picker.htmlID(), Step, strconv.Itoa(step), picker.session) } else { removeProperty(picker.htmlID(), Step, picker.session) } } return true } case DatePickerValue: oldDate := GetDatePickerValue(picker, "") if date, ok := setTimeValue(DatePickerMax); ok { picker.session.runScript(fmt.Sprintf(`setInputValue('%s', '%s')`, picker.htmlID(), date.Format(dateFormat))) if date != oldDate { for _, listener := range picker.dateChangedListeners { listener(picker, date) } } return true } case DateChangedEvent: switch value := value.(type) { case func(DatePicker, time.Time): picker.dateChangedListeners = []func(DatePicker, time.Time){value} case func(time.Time): fn := func(view DatePicker, date time.Time) { value(date) } picker.dateChangedListeners = []func(DatePicker, time.Time){fn} case []func(DatePicker, time.Time): picker.dateChangedListeners = value case []func(time.Time): listeners := make([]func(DatePicker, time.Time), len(value)) for i, val := range value { if val == nil { notCompatibleType(tag, val) return false } listeners[i] = func(view DatePicker, date time.Time) { val(date) } } picker.dateChangedListeners = listeners case []interface{}: listeners := make([]func(DatePicker, time.Time), len(value)) for i, val := range value { if val == nil { notCompatibleType(tag, val) return false } switch val := val.(type) { case func(DatePicker, time.Time): listeners[i] = val case func(time.Time): listeners[i] = func(view DatePicker, date time.Time) { val(date) } default: notCompatibleType(tag, val) return false } } picker.dateChangedListeners = listeners } return true default: if picker.viewData.set(tag, value) { picker.propertyChanged(tag) return true } } return false } func (picker *datePickerData) Get(tag string) interface{} { return picker.get(picker.normalizeTag(tag)) } func (picker *datePickerData) get(tag string) interface{} { 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)"`) } 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 interface{}) (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, ok := valueFromStyle(view, shortTag); ok { 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 "" then a value from the first argument (view) is returned. func GetDatePickerMin(view View, subviewID string) (time.Time, bool) { if subviewID != "" { view = ViewByID(view, subviewID) } 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 "" then a value from the first argument (view) is returned. func GetDatePickerMax(view View, subviewID string) (time.Time, bool) { if subviewID != "" { view = ViewByID(view, subviewID) } 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 "" then a value from the first argument (view) is returned. func GetDatePickerStep(view View, subviewID string) int { if subviewID != "" { view = ViewByID(view, subviewID) } if view != nil { if result, _ := intStyledProperty(view, DatePickerStep, 0); result >= 0 { return result } } return 0 } // GetDatePickerValue returns the date of DatePicker subview. // If the second argument (subviewID) is "" then a value from the first argument (view) is returned. func GetDatePickerValue(view View, subviewID string) time.Time { if subviewID != "" { view = ViewByID(view, subviewID) } 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 "" then a value from the first argument (view) is returned. func GetDateChangedListeners(view View, subviewID string) []func(DatePicker, time.Time) { if subviewID != "" { view = ViewByID(view, subviewID) } if view != nil { if value := view.Get(DateChangedEvent); value != nil { if listeners, ok := value.([]func(DatePicker, time.Time)); ok { return listeners } } } return []func(DatePicker, time.Time){} }