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package askcli
import (
"context"
"io"
)
type commandHandler func(d *Dispatcher, ctx context.Context, args []string, stdin io.Reader, stdout, stderr io.Writer) (int, error)
type simpleCommand func(d *Dispatcher, ctx context.Context, args []string, stdout, stderr io.Writer) (int, error)
func wrapSimpleCommand(handler simpleCommand) commandHandler {
return func(d *Dispatcher, ctx context.Context, args []string, stdin io.Reader, stdout, stderr io.Writer) (int, error) {
return handler(d, ctx, args, stdout, stderr)
}
}
type commandEntry struct {
name string
description string
handler commandHandler
includeInCompletion bool
singleSelector bool
readOnly bool
}
type commandTable struct {
entries []commandEntry
lookup map[string]int
}
// newCommandTable builds a command table and returns a pointer to it. A
// pointer is used because add mutates the table (it grows the entries slice
// and updates the lookup map), and all methods therefore share the same
// pointer-receiver convention to keep the receiver type consistent.
func newCommandTable(entries []commandEntry) *commandTable {
lookup := make(map[string]int, len(entries))
for i := range entries {
entry := entries[i]
lookup[entry.name] = i
}
return &commandTable{entries: entries, lookup: lookup}
}
// get returns the entry registered under name. Uses a pointer receiver to
// match add, which must mutate the table.
func (t *commandTable) get(name string) (*commandEntry, bool) {
idx, ok := t.lookup[name]
if !ok {
return nil, false
}
return &t.entries[idx], true
}
// rootCompletionEntries returns the entries that should appear in top-level
// shell completion. Pointer receiver for consistency with the rest of the type.
func (t *commandTable) rootCompletionEntries() []commandEntry {
var entries []commandEntry
for _, entry := range t.entries {
if entry.includeInCompletion {
entries = append(entries, entry)
}
}
return entries
}
// singleSelectorNames returns the names of commands that take a single task
// selector. Pointer receiver for consistency with the rest of the type.
func (t *commandTable) singleSelectorNames() []string {
var names []string
for _, entry := range t.entries {
if entry.singleSelector {
names = append(names, entry.name)
}
}
return names
}
// add appends an entry and records its index in the lookup map. This mutates
// the receiver, which is why the whole type uses pointer receivers.
func (t *commandTable) add(entry commandEntry) {
t.entries = append(t.entries, entry)
t.lookup[entry.name] = len(t.entries) - 1
}
var commandRegistry = newCommandTable([]commandEntry{
{
name: "add",
description: "Create a new task",
handler: wrapSimpleCommand((*Dispatcher).handleAdd),
includeInCompletion: true,
},
{
name: "list",
description: "List active tasks",
handler: wrapSimpleCommand((*Dispatcher).handleList),
includeInCompletion: true,
readOnly: true,
},
{
name: "all",
description: "List all tasks",
handler: wrapSimpleCommand((*Dispatcher).handleAll),
includeInCompletion: true,
readOnly: true,
},
{
name: "ready",
description: "List READY tasks",
handler: wrapSimpleCommand((*Dispatcher).handleReady),
includeInCompletion: true,
readOnly: true,
},
{
name: "completed",
description: "List completed tasks",
handler: wrapSimpleCommand((*Dispatcher).handleCompleted),
includeInCompletion: true,
readOnly: true,
},
{
name: "info",
description: "Show task details",
handler: wrapSimpleCommand((*Dispatcher).handleInfo),
includeInCompletion: true,
singleSelector: true,
readOnly: true,
},
{
name: "annotate",
description: "Add an annotation",
handler: wrapSimpleCommand((*Dispatcher).handleAnnotate),
includeInCompletion: true,
singleSelector: true,
},
{
name: "start",
description: "Start a task",
handler: wrapSimpleCommand((*Dispatcher).handleStart),
includeInCompletion: true,
singleSelector: true,
},
{
name: "stop",
description: "Stop a task",
handler: wrapSimpleCommand((*Dispatcher).handleStop),
includeInCompletion: true,
singleSelector: true,
},
{
name: "done",
description: "Mark a task complete",
handler: wrapSimpleCommand((*Dispatcher).handleDone),
includeInCompletion: true,
singleSelector: true,
},
{
name: "priority",
description: "Set priority",
handler: wrapSimpleCommand((*Dispatcher).handlePriority),
includeInCompletion: true,
singleSelector: true,
},
{
name: "tag",
description: "Add or remove a tag",
handler: wrapSimpleCommand((*Dispatcher).handleTag),
includeInCompletion: true,
singleSelector: true,
},
{
name: "modify",
description: "Modify task fields",
handler: wrapSimpleCommand((*Dispatcher).handleModify),
includeInCompletion: true,
singleSelector: true,
},
{
name: "denotate",
description: "Remove an annotation",
handler: wrapSimpleCommand((*Dispatcher).handleDenotate),
includeInCompletion: true,
singleSelector: true,
},
{
name: "delete",
description: "Delete a task",
handler: (*Dispatcher).handleDelete,
includeInCompletion: true,
singleSelector: true,
},
{
name: "dep",
description: "Manage dependencies",
handler: wrapSimpleCommand((*Dispatcher).handleDep),
includeInCompletion: true,
},
{
name: "urgency",
description: "List tasks sorted by urgency",
handler: wrapSimpleCommand((*Dispatcher).handleUrgency),
includeInCompletion: true,
readOnly: true,
},
})
func init() {
commandRegistry.add(commandEntry{
name: "projects",
description: "List projects with pending, not-yet-started tasks",
handler: wrapSimpleCommand((*Dispatcher).handleProjects),
includeInCompletion: true,
readOnly: true,
})
commandRegistry.add(commandEntry{
name: "watch",
description: "Repeatedly run a subcommand and redraw when output changes",
handler: wrapSimpleCommand((*Dispatcher).handleWatch),
includeInCompletion: true,
})
commandRegistry.add(commandEntry{
name: "edit",
description: "Edit a task description in $EDITOR (or create one)",
handler: wrapSimpleCommand((*Dispatcher).handleEdit),
includeInCompletion: true,
singleSelector: true,
})
commandRegistry.add(commandEntry{
name: "fish",
description: "Emit Fish shell completion script",
handler: wrapSimpleCommand((*Dispatcher).handleFish),
includeInCompletion: true,
})
commandRegistry.add(commandEntry{
name: "help",
description: "Show help",
readOnly: true,
handler: func(d *Dispatcher, ctx context.Context, args []string, stdin io.Reader, stdout, stderr io.Writer) (int, error) {
_ = ctx
_ = args
_ = stdin
_ = stderr
return d.help(stdout)
},
includeInCompletion: true,
})
commandRegistry.add(commandEntry{
name: "complete-uuids",
description: "Emit task selector list",
handler: wrapSimpleCommand((*Dispatcher).handleCompleteUUIDs),
includeInCompletion: false,
})
commandRegistry.add(commandEntry{
name: "complete-aliases",
description: "Emit short task selector list for Fish completion",
handler: wrapSimpleCommand((*Dispatcher).handleCompleteAliases),
includeInCompletion: false,
})
}
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