~taiite/senpai

ref: 2c7bc6ac7a8adcb591a975fbc3ab3abe47fa99fa senpai/commands.go -rw-r--r-- 11.3 KiB
2c7bc6acdelthas Add notify types for fine-grained control of unread/highlight state 1 year, 1 month ago
                                                                                
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
package senpai

import (
	"fmt"
	"strings"
	"time"

	"git.sr.ht/~taiite/senpai/irc"
	"git.sr.ht/~taiite/senpai/ui"
	"github.com/gdamore/tcell/v2"
)

type command struct {
	AllowHome bool
	MinArgs   int
	MaxArgs   int
	Usage     string
	Desc      string
	Handle    func(app *App, buffer string, args []string) error
}

type commandSet map[string]*command

var commands commandSet

func init() {
	commands = commandSet{
		"HELP": {
			AllowHome: true,
			MaxArgs:   1,
			Usage:     "[command]",
			Desc:      "show the list of commands, or how to use the given one",
			Handle:    commandDoHelp,
		},
		"JOIN": {
			AllowHome: true,
			MinArgs:   1,
			MaxArgs:   2,
			Usage:     "<channels> [keys]",
			Desc:      "join a channel",
			Handle:    commandDoJoin,
		},
		"ME": {
			AllowHome: true,
			MinArgs:   1,
			MaxArgs:   1,
			Usage:     "<message>",
			Desc:      "send an action (reply to last query if sent from home)",
			Handle:    commandDoMe,
		},
		"MSG": {
			AllowHome: true,
			MinArgs:   2,
			MaxArgs:   2,
			Usage:     "<target> <message>",
			Desc:      "send a message to the given target",
			Handle:    commandDoMsg,
		},
		"NAMES": {
			Desc:   "show the member list of the current channel",
			Handle: commandDoNames,
		},
		"NICK": {
			AllowHome: true,
			MinArgs:   1,
			MaxArgs:   1,
			Usage:     "<nickname>",
			Desc:      "change your nickname",
			Handle:    commandDoNick,
		},
		"MODE": {
			AllowHome: true,
			MinArgs:   2,
			MaxArgs:   5, // <channel> <flags> <limit> <user> <ban mask>
			Usage:     "<nick/channel> <flags> [args]",
			Desc:      "change channel or user modes",
			Handle:    commandDoMode,
		},
		"PART": {
			AllowHome: true,
			MaxArgs:   2,
			Usage:     "[channel] [reason]",
			Desc:      "part a channel",
			Handle:    commandDoPart,
		},
		"QUIT": {
			AllowHome: true,
			MaxArgs:   1,
			Usage:     "[reason]",
			Desc:      "quit senpai",
			Handle:    commandDoQuit,
		},
		"QUOTE": {
			AllowHome: true,
			MinArgs:   1,
			MaxArgs:   1,
			Usage:     "<raw message>",
			Desc:      "send raw protocol data",
			Handle:    commandDoQuote,
		},
		"REPLY": {
			AllowHome: true,
			MinArgs:   1,
			MaxArgs:   1,
			Usage:     "<message>",
			Desc:      "reply to the last query",
			Handle:    commandDoR,
		},
		"TOPIC": {
			MaxArgs: 1,
			Usage:   "[topic]",
			Desc:    "show or set the topic of the current channel",
			Handle:  commandDoTopic,
		},
		"BUFFER": {
			AllowHome: true,
			MinArgs:   1,
			MaxArgs:   1,
			Usage:     "<name>",
			Desc:      "switch to the buffer containing a substring",
			Handle:    commandDoBuffer,
		},
	}
}

func noCommand(app *App, buffer, content string) error {
	// You can't send messages to home buffer, and it might get
	// delivered to a user "home" without a bouncer, which will be bad.
	if buffer == Home {
		return fmt.Errorf("Can't send message to home")
	}

	app.s.PrivMsg(buffer, content)
	if !app.s.HasCapability("echo-message") {
		buffer, line, _ := app.formatMessage(irc.MessageEvent{
			User:            app.s.Nick(),
			Target:          buffer,
			TargetIsChannel: true,
			Command:         "PRIVMSG",
			Content:         content,
			Time:            time.Now(),
		})
		app.win.AddLine(buffer, ui.NotifyNone, line)
	}

	return nil
}

func commandDoHelp(app *App, buffer string, args []string) (err error) {
	t := time.Now()
	if len(args) == 0 {
		app.win.AddLine(app.win.CurrentBuffer(), ui.NotifyNone, ui.Line{
			At:   t,
			Head: "--",
			Body: ui.PlainString("Available commands:"),
		})
		for cmdName, cmd := range commands {
			if cmd.Desc == "" {
				continue
			}
			app.win.AddLine(app.win.CurrentBuffer(), ui.NotifyNone, ui.Line{
				At:   t,
				Body: ui.PlainSprintf("  \x02%s\x02 %s", cmdName, cmd.Usage),
			})
			app.win.AddLine(app.win.CurrentBuffer(), ui.NotifyNone, ui.Line{
				At:   t,
				Body: ui.PlainSprintf("    %s", cmd.Desc),
			})
			app.win.AddLine(app.win.CurrentBuffer(), ui.NotifyNone, ui.Line{
				At: t,
			})
		}
	} else {
		search := strings.ToUpper(args[0])
		found := false
		app.win.AddLine(app.win.CurrentBuffer(), ui.NotifyNone, ui.Line{
			At:   t,
			Head: "--",
			Body: ui.PlainSprintf("Commands that match \"%s\":", search),
		})
		for cmdName, cmd := range commands {
			if !strings.Contains(cmdName, search) {
				continue
			}
			usage := new(ui.StyledStringBuilder)
			usage.Grow(len(cmdName) + 1 + len(cmd.Usage))
			usage.SetStyle(tcell.StyleDefault.Bold(true))
			usage.WriteString(cmdName)
			usage.SetStyle(tcell.StyleDefault)
			usage.WriteByte(' ')
			usage.WriteString(cmd.Usage)
			app.win.AddLine(app.win.CurrentBuffer(), ui.NotifyNone, ui.Line{
				At:   t,
				Body: usage.StyledString(),
			})
			app.win.AddLine(app.win.CurrentBuffer(), ui.NotifyNone, ui.Line{
				At:   t,
				Body: ui.PlainSprintf("  %s", cmd.Desc),
			})
			app.win.AddLine(app.win.CurrentBuffer(), ui.NotifyNone, ui.Line{
				At: t,
			})
			found = true
		}
		if !found {
			app.win.AddLine(app.win.CurrentBuffer(), ui.NotifyNone, ui.Line{
				At:   t,
				Body: ui.PlainSprintf("  no command matches %q", args[0]),
			})
		}
	}
	return
}

func commandDoJoin(app *App, buffer string, args []string) (err error) {
	key := ""
	if len(args) == 2 {
		key = args[1]
	}
	app.s.Join(args[0], key)
	return
}

func commandDoMe(app *App, buffer string, args []string) (err error) {
	if buffer == Home {
		buffer = app.lastQuery
	}
	content := fmt.Sprintf("\x01ACTION %s\x01", args[0])
	app.s.PrivMsg(buffer, content)
	if !app.s.HasCapability("echo-message") {
		buffer, line, _ := app.formatMessage(irc.MessageEvent{
			User:            app.s.Nick(),
			Target:          buffer,
			TargetIsChannel: true,
			Command:         "PRIVMSG",
			Content:         content,
			Time:            time.Now(),
		})
		app.win.AddLine(buffer, ui.NotifyNone, line)
	}
	return
}

func commandDoMsg(app *App, buffer string, args []string) (err error) {
	target := args[0]
	content := args[1]
	app.s.PrivMsg(target, content)
	if !app.s.HasCapability("echo-message") {
		buffer, line, _ := app.formatMessage(irc.MessageEvent{
			User:            app.s.Nick(),
			Target:          target,
			TargetIsChannel: true,
			Command:         "PRIVMSG",
			Content:         content,
			Time:            time.Now(),
		})
		app.win.AddLine(buffer, ui.NotifyNone, line)
	}
	return
}

func commandDoNames(app *App, buffer string, args []string) (err error) {
	sb := new(ui.StyledStringBuilder)
	sb.SetStyle(tcell.StyleDefault.Foreground(tcell.ColorGrey))
	sb.WriteString("Names: ")
	for _, name := range app.s.Names(buffer) {
		if name.PowerLevel != "" {
			sb.SetStyle(tcell.StyleDefault.Foreground(tcell.ColorGreen))
			sb.WriteString(name.PowerLevel)
			sb.SetStyle(tcell.StyleDefault.Foreground(tcell.ColorGrey))
		}
		sb.WriteString(name.Name.Name)
		sb.WriteByte(' ')
	}
	body := sb.StyledString()
	// TODO remove last space
	app.win.AddLine(buffer, ui.NotifyNone, ui.Line{
		At:        time.Now(),
		Head:      "--",
		HeadColor: tcell.ColorGray,
		Body:      body,
	})
	return
}

func commandDoNick(app *App, buffer string, args []string) (err error) {
	nick := args[0]
	if i := strings.IndexAny(nick, " :@!*?"); i >= 0 {
		return fmt.Errorf("illegal char %q in nickname", nick[i])
	}
	app.s.ChangeNick(nick)
	return
}

func commandDoMode(app *App, buffer string, args []string) (err error) {
	channel := args[0]
	flags := args[1]
	mode_args := args[2:]

	app.s.ChangeMode(channel, flags, mode_args)
	return
}

func commandDoPart(app *App, buffer string, args []string) (err error) {
	channel := buffer
	reason := ""
	if 0 < len(args) {
		if app.s.IsChannel(args[0]) {
			channel = args[0]
			if 1 < len(args) {
				reason = args[1]
			}
		} else {
			reason = args[0]
		}
	}

	if channel != Home {
		app.s.Part(channel, reason)
	} else {
		err = fmt.Errorf("cannot part home!")
	}
	return
}

func commandDoQuit(app *App, buffer string, args []string) (err error) {
	reason := ""
	if 0 < len(args) {
		reason = args[0]
	}
	if app.s != nil {
		app.s.Quit(reason)
	}
	app.win.Exit()
	return
}

func commandDoQuote(app *App, buffer string, args []string) (err error) {
	app.s.SendRaw(args[0])
	return
}

func commandDoR(app *App, buffer string, args []string) (err error) {
	app.s.PrivMsg(app.lastQuery, args[0])
	if !app.s.HasCapability("echo-message") {
		buffer, line, _ := app.formatMessage(irc.MessageEvent{
			User:            app.s.Nick(),
			Target:          app.lastQuery,
			TargetIsChannel: true,
			Command:         "PRIVMSG",
			Content:         args[0],
			Time:            time.Now(),
		})
		app.win.AddLine(buffer, ui.NotifyNone, line)
	}
	return
}

func commandDoTopic(app *App, buffer string, args []string) (err error) {
	if len(args) == 0 {
		var body string

		topic, who, at := app.s.Topic(buffer)
		if who == nil {
			body = fmt.Sprintf("Topic: %s", topic)
		} else {
			body = fmt.Sprintf("Topic (by %s, %s): %s", who, at.Local().Format("Mon Jan 2 15:04:05"), topic)
		}
		app.win.AddLine(buffer, ui.NotifyNone, ui.Line{
			At:        time.Now(),
			Head:      "--",
			HeadColor: tcell.ColorGray,
			Body:      ui.Styled(body, tcell.StyleDefault.Foreground(tcell.ColorGray)),
		})
	} else {
		app.s.ChangeTopic(buffer, args[0])
	}
	return
}

// implemented from https://golang.org/src/strings/strings.go?s=8055:8085#L310
func fieldsN(s string, n int) []string {
	s = strings.TrimSpace(s)
	if s == "" || n == 0 {
		return nil
	}
	if n == 1 {
		return []string{s}
	}
	n--
	// Start of the ASCII fast path.
	var a []string
	na := 0
	fieldStart := 0
	i := 0
	// Skip spaces in front of the input.
	for i < len(s) && s[i] == ' ' {
		i++
	}
	fieldStart = i
	for i < len(s) {
		if s[i] != ' ' {
			i++
			continue
		}
		a = append(a, s[fieldStart:i])
		na++
		i++
		// Skip spaces in between fields.
		for i < len(s) && s[i] == ' ' {
			i++
		}
		fieldStart = i
		if n <= na {
			a = append(a, s[fieldStart:])
			return a
		}
	}
	if fieldStart < len(s) {
		// Last field ends at EOF.
		a = append(a, s[fieldStart:])
	}
	return a
}

func parseCommand(s string) (command, args string, isCommand bool) {
	if s[0] != '/' {
		return "", s, false
	}
	if s[1] == '/' {
		// Input starts with two slashes.
		return "", s[1:], false
	}

	i := strings.IndexByte(s, ' ')
	if i < 0 {
		i = len(s)
	}

	isCommand = true
	command = strings.ToUpper(s[1:i])
	args = strings.TrimLeft(s[i:], " ")
	return
}

func (app *App) handleInput(buffer, content string) error {
	if content == "" {
		return nil
	}

	cmdName, rawArgs, isCommand := parseCommand(content)
	if !isCommand {
		return noCommand(app, buffer, rawArgs)
	}
	if cmdName == "" {
		return fmt.Errorf("lone slash at the begining")
	}

	var chosenCMDName string
	var found bool
	for key := range commands {
		if !strings.HasPrefix(key, cmdName) {
			continue
		}
		if found {
			return fmt.Errorf("ambiguous command %q (could mean %v or %v)", cmdName, chosenCMDName, key)
		}
		chosenCMDName = key
		found = true
	}
	if !found {
		return fmt.Errorf("command %q doesn't exist", cmdName)
	}

	cmd := commands[chosenCMDName]

	var args []string
	if rawArgs != "" && cmd.MaxArgs != 0 {
		args = fieldsN(rawArgs, cmd.MaxArgs)
	}

	if len(args) < cmd.MinArgs {
		return fmt.Errorf("usage: %s %s", cmdName, cmd.Usage)
	}
	if buffer == Home && !cmd.AllowHome {
		return fmt.Errorf("command %q cannot be executed from home", cmdName)
	}

	return cmd.Handle(app, buffer, args)
}

func commandDoBuffer(app *App, buffer string, args []string) error {
	name := args[0]
	if !app.win.JumpBuffer(args[0]) {
		return fmt.Errorf("none of the buffers match %q", name)
	}

	return nil
}