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
extern crate rand;
extern crate regex;
extern crate clap;
#[macro_use] extern crate lazy_static;
use regex::Regex;
use std::error::Error;
use std::collections::HashMap;
use rand::{Rng, SeedableRng, StdRng};
const LETTER_HEIGHT: usize = 17;
const OOZZ_HEIGHT: usize = 22;
pub const LETTERS: &'static str = "abcdefghijklmnopqrstuvwxyz.! /'\"_$1234567890";
const CHARS: &'static str = include_str!("../resources/chars.latin1");
const EXTRA: &'static str = include_str!("../resources/extra.latin1");
const OOZZ: &'static str = include_str!("../resources/oozz.latin1");
const SYMBOLS: &str = "[]";
const CHAR_WIDTH: usize = 18;
pub fn valid_chars(v: String) -> Result<(), String> {
lazy_static! {
static ref VALID_RE: Regex = Regex::new(r"[^a-zA-Z\s!\./'\042_\$0-9]").unwrap();
}
match VALID_RE.captures(&v[..]) {
None => Ok(()),
Some(cap) => Err(format!("Unsupported character: {:#?}", cap))
}
}
fn colorize (line: &str, color: u8, bold: bool) -> String {
let escape = format!("{};{}m", bold as u8, color);
line.replace("32m", &escape)
}
fn trim_prelude (line: &str) -> String {
line.replace("\x1b[0;1;40;32m", "")
}
fn create_prelude(color: u8, bold: bool) -> String {
let b = if bold { "1;" } else { "" };
format!("[0;{}{}m", b, color)
}
fn parse_string(input: &str, letters: &str, color: u8, bold: bool) -> HashMap<char, Vec<String>> {
let mut map = HashMap::new();
let mut lines: Vec<String> = input
.lines()
.enumerate()
.map(|(i, l)| {
if i == 0 {
colorize(&trim_prelude(l), color, bold)
} else {
colorize(l, color, bold)
}
})
.collect();
for c in letters.chars() {
map.insert(c, lines.drain(..LETTER_HEIGHT).collect());
}
map
}
fn parse_oozz(input: &str) -> Vec<Vec<String>> {
let mut out: Vec<Vec<String>> = Vec::new();
let mut padded: Vec<String> = Vec::new();
let all_escape_re = Regex::new(r"(\x1b[^m]*m|\x1b\[\d+C)").unwrap();
let cursor_forward_re = Regex::new(r"(\x1b\[)([0-9]+)(C)").unwrap();
for line in input.lines() {
let mut captured_padding = 0;
for cap in cursor_forward_re.captures_iter(line) {
captured_padding = captured_padding + &cap[2].parse::<usize>().expect("Failed to parse cursor_forward_re capture");
}
let trimmed = all_escape_re.replace_all(line, "");
let count = trimmed.chars().count();
let pad_count = CHAR_WIDTH - count - captured_padding;
let pad = if pad_count > 0 {
format!("\x1b[{}C", pad_count)
} else {
String::from("")
};
padded.push(String::from(line) + &pad[..]);
}
while !padded.is_empty() {
out.push(padded.drain(..OOZZ_HEIGHT).collect());
}
out
}
fn choose_oozz(input: &str, oozz: &[Vec<String>]) -> Result<Vec<Vec<String>>, Box<Error>> {
let seed: Vec<usize> = input.chars().map(|c| c as usize).collect();
let mut rng: StdRng = SeedableRng::from_seed(&seed[..]);
let mut out = Vec::new();
for _ in input.chars() {
let chosen = rng.choose(oozz).ok_or("Failed to randomly choose an oozz character from parsed")?;
out.push(chosen.to_vec());
}
Ok(out)
}
fn produce_chars(input: &str, color: u8, bold: bool) -> Result<Vec<String>, Box<Error>> {
let chars = parse_string(CHARS, LETTERS, color, bold);
let extra = parse_string(EXTRA, SYMBOLS, color, bold);
let chars_start = extra.get(&'[').ok_or("Couldn't retrive start character from extra")?;
let chars_stop = extra.get(&']').ok_or("Couldn't retrive end character from extra")?;
let mut out = Vec::new();
for n in 0..LETTER_HEIGHT {
let mut line = chars_start[n].clone();
for input_char in input.chars().enumerate() {
let (i, c) = input_char;
if i == 0 && n == 0 {
line = [create_prelude(color, bold), line].concat();
}
let output_char = chars.get(&c).ok_or("Failed to retrieve character from chars")?;
line += &output_char[n][..];
}
line += &chars_stop[n][..];
out.push(line)
}
Ok(out)
}
fn produce_oozz(input: &str) -> Result<Vec<String>, Box<Error>> {
let oozz = parse_oozz(OOZZ);
let oozz_stop = "─┘";
let oozz_start = "└─";
let oozz = choose_oozz(input, &oozz)?;
let mut out = Vec::new();
for n in 0..OOZZ_HEIGHT {
let mut line = String::new();
if n == 0 {
line += oozz_start;
} else {
line += " ";
}
for input_char in input.chars().enumerate() {
let (i, _) = input_char;
let output_char = oozz.get(i).ok_or("Failed to retrieve character from oozz")?;
line += &output_char[n][..];
}
if n == 0 {
line += oozz_stop;
} else {
line += " ";
}
out.push(line);
}
Ok(out)
}
fn get_color_id(color: &str) -> Result<u8, String> {
match color {
"black" => Ok(30),
"red" => Ok(31),
"green" => Ok(32),
"yellow" => Ok(33),
"blue" => Ok(34),
"magenta" => Ok(35),
"cyan" => Ok(36),
"white" => Ok(37),
&_ => Err(format!("unable to match provided color: {}", &color))
}
}
pub fn run(input: &str, color: &str, bold: bool, center: bool, term_width: usize) -> Result<Vec<String>, Box<Error>> {
let color = get_color_id(color)?;
let chars = produce_chars(&input, color, bold)?;
let oozz = produce_oozz(&input)?;
let mut out: Vec<String> = Vec::new();
let out_width = CHAR_WIDTH * input.chars().count();
if center && out_width < term_width {
let padding = (term_width - out_width - 4) / 2;
for c in chars {
out.push(format!("\x1b[{}C{}", padding, c));
}
for o in oozz {
out.push(format!("\x1b[{}C{}", padding, o));
}
} else {
for c in chars {out.push(format!("{}", c));}
for o in oozz {out.push(format!("{}", o));}
};
out.push(String::from("\x1b[0m"));
Ok(out)
}
#[cfg(test)]
mod test;