chore(user/mw_create_redirect_day_month.sh):Add TODO comment
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1#!/usr/bin/env bash
2# Desc: Baltakatei's verbose date command
3# Usage: bkdatev [args]
4# Example: bkdatev --date="2001-09-11T09:02:59-04"
5# Version: 0.2.2
6# Ref/Attrib: [1] "ISO 8601". Wikipedia. https://en.wikipedia.org/wiki/ISO_8601
7# [2] "Changing the Locale in Wine" https://stackoverflow.com/a/16428951
8# [3] "Shanghai vs Beijing" https://bugs.launchpad.net/ubuntu/+source/libgweather/+bug/228554
9# Notes: * Check `ls -R /usr/share/zoneinfo` for time zone names.
10# * Check `cat /usr/share/i18n/SUPPORTED` for supported locales.
11# * For list of valid locales, see: https://manpages.ubuntu.com/manpages/bionic/man3/DateTime::Locale::Catalog.3pm.html
12# * Locations chosen for population, personal signifiance, and spatial coverage.
13# * For International Atomic Time (TAI), use offsets from UTC provided in `/usr/share/zoneinfo/leap-seconds.list`.
14
15line_sep() {
16 # Input: var: n_ln
17 local skip_every=4;
18 ((n_ln++));
19 if ! ((n_ln % "$skip_every")); then
20 printf "\n";
21 fi;
22 return 0;
23}; # periodically print separating blank line
24print_dateline() {
25 # Input: var: $id
26 # var: $fs_1
27 # var: $fs_2
28 # var: $fs_3
29 # args: $@
30 # Output: stdout
31 # Depends: printf, date
32 # Ref/Attrib: * Truncate string in printf https://stackoverflow.com/a/46812677
33 local s_1 s_2 s_3 s_4;
34
35 s_1="$id";
36 s_2="$(date "$@" "$fs_1")";
37 s_3="$(date "$@" "$fs_2")";
38 s_4="$(date "$@" "$fs_3")";
39
40 printf "%-10.10s %-25.25s (%-20.20s) (%s)" "$s_1" "$s_2" "$s_3" "$s_4";
41 printf "\n";
42
43 unset fs_1 fs_2 fs_3 fs_4;
44 }; # print line of dates
45main() {
46 n_ln=0; # for line_sep()
47 unset LC_TIME; # Fall back to time zone-specific locale settings.
48
49 # format strings
50 fs_iso8601="+%Y-%m-%dT%H:%M:%S%:::z"; # typical ISO-8601
51 fs_iso8601_etc="+%G-W%V-%u, %Y-%j"; # alternate ISO-8601 dates
52 fs_locale="+%Z; %A; %c"; # locale-specific date strings
53
54 # vars for print_dateline()
55 fs_1="$fs_iso8601";
56 fs_2="$fs_iso8601_etc";
57 fs_3="$fs_locale";
58
59 # UTC (pop. (2021): 7,837,000,000)
60 (
61 export TZ=UTC;
62 id="UTC";
63 fs_3="+%s seconds since 1970-01-01T00:00+00";
64 print_dateline "$@";
65 ); line_sep;
66
67 # Hawaii
68 (
69 export TZ=US/Hawaii;
70 export LANG="haw-US.UTF8";
71 id="HAWAII";
72 print_dateline "$@";
73 ); line_sep;
74
75 # Los Angeles, USA
76 (
77 export TZ=America/Los_Angeles;
78 export LANG="en_US.UTF-8";
79 id="LOS ANGELES";
80 print_dateline "$@";
81 ); line_sep;
82
83 # Denver, USA (pop. (2021): 711,463)
84 (
85 export TZ=America/Denver;
86 export LANG="en_US.UTF-8";
87 id="DENVER";
88 print_dateline "$@";
89 ); line_sep;
90
91 # Chicago, USA (pop. (2021): 711,463)
92 (
93 export TZ=America/Chicago;
94 export LANG="en_US.UTF-8";
95 id="CHICAGO";
96 print_dateline "$@";
97 ); line_sep;
98
99 # Mexico City, Mexico (pop. (2018): 21,804,515)
100 (
101 export TZ=America/Mexico_City;
102 export LANG="es_MX.UTF8";
103 id="MEXICO CITY";
104 print_dateline "$@";
105 ); line_sep;
106
107 # Panama City, Panama
108 (
109 export TZ=America/Panama;
110 export LANG="es_PA.UTF8";
111 id="PANAMA CITY";
112 print_dateline "$@";
113 ); line_sep;
114
115 # New York, USA (pop. (2018): 20,140,470)
116 (
117 export TZ=America/New_York;
118 export LANG="en_US.UTF-8";
119 id="NEW YORK";
120 print_dateline "$@";
121 ); line_sep;
122
123 # São Paulo, Brazil
124 (
125 export TZ=America/Sao_Paulo;
126 export LANG="pt_BR.UTF8";
127 id="SAO PAULO";
128 print_dateline "$@";
129 ); line_sep;
130
131 # Buenos Aires
132 (
133 export TZ=America/Argentina/Buenos_Aires;
134 export LANG="es_AR.UTF8";
135 id="BUENOS AIRES";
136 print_dateline "$@";
137 ); line_sep;
138
139 # London, England
140 (
141 export TZ=Europe/London;
142 export LANG="en_GB.UTF-8";
143 id="LONDON";
144 print_dateline "$@";
145 ); line_sep;
146
147 # Kinshasa, Africa
148 (
149 export TZ=Africa/Kinshasa;
150 export LANG="ln_CD.UTF8";
151 id="KINSHASA";
152 print_dateline "$@";
153 ); line_sep;
154
155 # Lagos, Africa
156 (
157 export TZ=Africa/Lagos;
158 export LANG="en_NG.UTF8";
159 id="LAGOS";
160 print_dateline "$@";
161 ); line_sep;
162
163 # Paris, France
164 (
165 export TZ=Europe/Paris;
166 export LANG="fr_FR.UTF8";
167 id="PARIS";
168 print_dateline "$@";
169 ); line_sep;
170
171 # Stockholm, Sweden
172 (
173 export TZ=Europe/Stockholm;
174 export LANG="sv_SE.UTF8";
175 id="STOCKHOLM";
176 print_dateline "$@";
177 ); line_sep;
178
179 # Cairo, Egypt
180 (
181 export TZ=Africa/Cairo;
182 export LANG="ar_EG.UTF8";
183 id="CAIRO";
184 print_dateline "$@";
185 ); line_sep;
186
187 # Athens (pop. (2020): 3,526,887)
188 (
189 export TZ=Europe/Athens;
190 export LANG="el_GR.UTF8";
191 id="ATHENS";
192 print_dateline "$@";
193 ); line_sep;
194
195 # Istanbul (pop. (2020): 13,719,061)
196 (
197 export TZ=Asia/Istanbul;
198 export LANG="tr_TR.UTF8";
199 id="ISTANBUL";
200 print_dateline "$@";
201 ); line_sep;
202
203 # Tehran, Iran
204 (
205 export TZ=Asia/Tehran;
206 export LANG="fa_IR.UTF8";
207 id="TEHRAN";
208 print_dateline "$@";
209 ); line_sep;
210
211 # Moscow, Russia
212 (
213 export TZ=Europe/Moscow;
214 export LANG="ru_RU.UTF-8";
215 id="MOSCOW";
216 print_dateline "$@";
217 ); line_sep;
218
219 # Kyiv, Ukraine (pop. (2021): 2,962,180)
220 (
221 export TZ=Europe/Kyiv;
222 export LANG="uk_UA.UTF-8";
223 id="KYIV";
224 print_dateline "$@";
225 ); line_sep;
226
227 # Delhi, India (pop. (2018): 29,000,000)
228 (
229 export TZ=Asia/Kolkata;
230 export LANG="hi_IN.UTF-8";
231 id="DELHI";
232 print_dateline "$@";
233 ); line_sep;
234
235 # Jakarta, Indonesia (pop. (2018): 33,430,285)
236 (
237 export TZ=Asia/Jakarta;
238 export LANG="id_ID.UTF8";
239 id="JAKARTA";
240 print_dateline "$@";
241 ); line_sep;
242
243 # Singapore, Singapore (pop (2018): 5,792,000)
244 (
245 export TZ=Asia/Singapore;
246 export LANG="en_SG.UTF-8";
247 id="SINGAPORE";
248 print_dateline "$@";
249 ); line_sep;
250
251 # Beijing, China (pop. (2018): 19,618,000)
252 (
253 export TZ=Asia/Shanghai; # [3]
254 export LANG="zh_CN.UTF-8";
255 id="BEIJING";
256 print_dateline "$@";
257 ); line_sep;
258
259 # Taipei, Taiwan (pop (2019): 7,034,084)
260 (
261 export TZ=Asia/Taipei; # [3]
262 export LANG="zh_TW.UTF-8";
263 id="TAIPEI";
264 print_dateline "$@";
265 ); line_sep;
266
267 # Tokyo, Japan (pop. (2018): 37,274,000)
268 (
269 export TZ=Asia/Tokyo;
270 export LANG="ja_JP.UTF8";
271 id="TOKYO";
272 print_dateline "$@";
273 ); line_sep;
274
275 # Seoul, South Korea (pop. (2018): 25,514,000)
276 (
277 export TZ=Asia/Seoul;
278 export LANG="ko_KR.UTF8";
279 id="SEOUL";
280 print_dateline "$@";
281 ); line_sep;
282
283 # Pyongyang, North Korea
284 (
285 export TZ=Asia/Pyongyang;
286 export LANG="ko_KP.UTF8";
287 id="PYONGYANG";
288 print_dateline "$@";
289 ); line_sep;
290
291 # Sydney, Australia
292 (
293 export TZ=Australia/Sydney;
294 export LANG="en_AU.UTF8";
295 id="SYDNEY";
296 print_dateline "$@";
297 ); line_sep;
298
299 # Guam
300 (
301 export TZ=Pacific/Guam;
302 export LANG="en_GU.UTF8";
303 id="GUAM";
304 print_dateline "$@";
305 ); line_sep;
306
307 # Auckland, New Zealand
308 (
309 export TZ=Pacific/Auckland;
310 export LANG="en_NZ.UTF8";
311 id="AUCKLAND";
312 print_dateline "$@";
313 ); line_sep;
314
315 return 0;
316}; # main program
317
318main "$@";