61 rinda
1.1 KiB
Go
61 rinda
1.1 KiB
Go
package chat
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import (
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"fmt"
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"sort"
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"strings"
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"git.tcp.direct/kayos/sh3lly/chat/message"
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)
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type helpItem struct {
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Prefix string
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Text string
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}
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type help struct {
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items []helpItem
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prefixWidth int
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}
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// NewCommandsHelp creates a help container from a commands container.
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func NewCommandsHelp(c []*Command) fmt.Stringer {
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lookup := map[string]struct{}{}
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h := help{
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items: []helpItem{},
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}
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for _, cmd := range c {
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if cmd.Help == "" {
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// Skip hidden commands.
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continue
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}
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_, exists := lookup[cmd.Prefix]
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if exists {
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// Duplicate (alias)
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continue
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}
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lookup[cmd.Prefix] = struct{}{}
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prefix := fmt.Sprintf("%s %s", cmd.Prefix, cmd.PrefixHelp)
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h.add(helpItem{prefix, cmd.Help})
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}
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return &h
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}
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func (h *help) add(item helpItem) {
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h.items = append(h.items, item)
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if len(item.Prefix) > h.prefixWidth {
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h.prefixWidth = len(item.Prefix)
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}
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}
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func (h help) String() string {
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var r []string
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format := fmt.Sprintf("%%-%ds - %%s", h.prefixWidth)
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for _, item := range h.items {
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r = append(r, fmt.Sprintf(format, item.Prefix, item.Text))
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}
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sort.Strings(r)
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return strings.Join(r, message.Newline)
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}
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