prosody
3f1889608f3e
util/human/io.lua

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util/human/io.lua @ 10870:3f1889608f3e

util.human.io: New central place for UI helpers
author Matthew Wild <mwild1@gmail.com>
date Tue, 02 Jun 2020 08:00:37 +0100
child 10872:a3f3f42736f2
comparison
equal deleted inserted replaced
10869:c91697b81349 10870:3f1889608f3e
1 local function getchar(n)
2 local stty_ret = os.execute("stty raw -echo 2>/dev/null");
3 local ok, char;
4 if stty_ret == true or stty_ret == 0 then
5 ok, char = pcall(io.read, n or 1);
6 os.execute("stty sane");
7 else
8 ok, char = pcall(io.read, "*l");
9 if ok then
10 char = char:sub(1, n or 1);
11 end
12 end
13 if ok then
14 return char;
15 end
16 end
17
18 local function getline()
19 local ok, line = pcall(io.read, "*l");
20 if ok then
21 return line;
22 end
23 end
24
25 local function getpass()
26 local stty_ret, _, status_code = os.execute("stty -echo 2>/dev/null");
27 if status_code then -- COMPAT w/ Lua 5.1
28 stty_ret = status_code;
29 end
30 if stty_ret ~= 0 then
31 io.write("\027[08m"); -- ANSI 'hidden' text attribute
32 end
33 local ok, pass = pcall(io.read, "*l");
34 if stty_ret == 0 then
35 os.execute("stty sane");
36 else
37 io.write("\027[00m");
38 end
39 io.write("\n");
40 if ok then
41 return pass;
42 end
43 end
44
45 local function show_yesno(prompt)
46 io.write(prompt, " ");
47 local choice = getchar():lower();
48 io.write("\n");
49 if not choice:match("%a") then
50 choice = prompt:match("%[.-(%U).-%]$");
51 if not choice then return nil; end
52 end
53 return (choice == "y");
54 end
55
56 local function read_password()
57 local password;
58 while true do
59 io.write("Enter new password: ");
60 password = getpass();
61 if not password then
62 print("No password - cancelled");
63 return;
64 end
65 io.write("Retype new password: ");
66 if getpass() ~= password then
67 if not show_yesno [=[Passwords did not match, try again? [Y/n]]=] then
68 return;
69 end
70 else
71 break;
72 end
73 end
74 return password;
75 end
76
77 local function show_prompt(prompt)
78 io.write(prompt, " ");
79 local line = getline();
80 line = line and line:gsub("\n$","");
81 return (line and #line > 0) and line or nil;
82 end
83
84 local function printf(fmt, ...)
85 print(msg:format(...));
86 end
87
88 return {
89 getchar = getchar;
90 getline = getline;
91 getpass = getpass;
92 show_yesno = show_yesno;
93 read_password = read_password;
94 show_prompt = show_prompt;
95 printf = printf;
96 };