From c7eceaa8da3cfcc008d8b89849bc44145d054f68 Mon Sep 17 00:00:00 2001
From: Alexey Yerin <yyp@disroot.org>
Date: Tue, 27 Apr 2021 15:58:36 +0300
Subject: Add BUFFER command to jump to the matching buffer

Is is very useful when you have joined a bunch of channels and scrolling
with Ctrl+n/Ctrl+p is quite inefficient.
---
 commands.go      | 17 +++++++++++++++++
 doc/senpai.1.scd |  3 +++
 ui/ui.go         | 12 ++++++++++++
 3 files changed, 32 insertions(+)

diff --git a/commands.go b/commands.go
index b3c2d14..6be50ed 100644
--- a/commands.go
+++ b/commands.go
@@ -100,6 +100,14 @@ func init() {
 			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,
+		},
 	}
 }
 
@@ -375,3 +383,12 @@ func (app *App) handleInput(buffer, content string) error {
 
 	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
+}
diff --git a/doc/senpai.1.scd b/doc/senpai.1.scd
index b2e05fd..3aecb3a 100644
--- a/doc/senpai.1.scd
+++ b/doc/senpai.1.scd
@@ -140,6 +140,9 @@ _name_ is matched case-insensitively.  It can be one of the following:
 *QUOTE* <raw message>
 	Send _raw message_ verbatim.
 
+*BUFFER* <name>
+	Switch to the buffer containing _name_.
+
 # SEE ALSO
 
 *senpai*(5)
diff --git a/ui/ui.go b/ui/ui.go
index 50ddab5..9ab9024 100644
--- a/ui/ui.go
+++ b/ui/ui.go
@@ -1,6 +1,7 @@
 package ui
 
 import (
+	"strings"
 	"sync/atomic"
 	"time"
 
@@ -140,6 +141,17 @@ func (ui *UI) AddLines(buffer string, lines []Line) {
 	ui.bs.AddLines(buffer, lines)
 }
 
+func (ui *UI) JumpBuffer(sub string) bool {
+	for i, b := range ui.bs.list {
+		if strings.Contains(b.title, sub) {
+			ui.bs.To(i)
+			return true
+		}
+	}
+
+	return false
+}
+
 func (ui *UI) SetStatus(status string) {
 	ui.status = status
 }
-- 
cgit v1.2.3