128 lines
2.3 KiB
Go
128 lines
2.3 KiB
Go
package tg
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import (
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"path"
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)
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// The type implements changing screen to the underlying ScreenId
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type ScreenGo struct {
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Path Path
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Arg any
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}
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func (sc ScreenGo) Act(c Context) {
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c.GoWithArg(sc.Path, sc.Arg)
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}
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// The same as Act.
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func (sc ScreenGo) Serve(c Context) {
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sc.Act(c)
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}
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// Unique identifier for the screen
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// and relative paths to the screen.
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type Path string
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// Returns true if the path is empty.
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func (p Path) IsEmpty() bool {
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return p == ""
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}
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// Returns true if the path is absolute.
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func (p Path) IsAbs() bool {
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if len(p) == 0 {
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return false
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}
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return p[0] == '/'
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}
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func (p Path) Dir() Path {
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return Path(path.Dir(string(p)))
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}
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// Clean the path deleting exceed ., .. and / .
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func (p Path) Clean() Path {
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return Path(path.Clean(string(p)))
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}
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// Screen statement of the bot.
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// Mostly what buttons to show.
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type Screen struct {
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// The widget to run when reaching the screen.
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Widget Widget
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}
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// The first node with the "/" path.
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type RootNode struct {
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Screen *Screen
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Subs []*Node
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}
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// The node is a simple way to represent
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// tree-like structured applications.
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type Node struct {
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Path Path
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Screen *Screen
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Subs []*Node
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}
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// Return new root node with the specified widget in the screen.
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func NewRootNode(widget Widget, subs ...*Node) *RootNode {
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ret := &RootNode{}
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ret.Screen = NewScreen(widget)
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ret.Subs = subs
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return ret
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}
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func NewNode(relPath Path, widget Widget, subs ...*Node) *Node {
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ret := &Node{}
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ret.Path = relPath
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ret.Screen = NewScreen(widget)
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ret.Subs = subs
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return ret
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}
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func (n *RootNode) ScreenMap() ScreenMap {
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m := make(ScreenMap)
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var root Path = "/"
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m[root] = n.Screen
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for _, sub := range n.Subs {
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buf := sub.ScreenMap(root)
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for k, v := range buf {
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_, ok := m[k]
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if ok {
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panic("duplicate paths in node definition")
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}
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m[k] = v
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}
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}
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return m
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}
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func (n *Node) ScreenMap(root Path) ScreenMap {
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m := make(ScreenMap)
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pth := (root + n.Path).Clean()
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m[pth] = n.Screen
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for _, sub := range n.Subs {
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buf := sub.ScreenMap(pth + "/")
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for k, v := range buf {
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_, ok := m[k]
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if ok {
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panic("duplicate paths in node definition")
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}
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m[k] = v
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}
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}
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return m
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}
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// Map structure for the screens.
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type ScreenMap map[Path] *Screen
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// Returns the new screen with specified name and widget.
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func NewScreen(widget Widget) *Screen {
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return &Screen{
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Widget: widget,
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}
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}
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