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Simple database: Difference between revisions
→{{header|Pike}}: translated from lisp
(→{{header|Common Lisp}}: make load-db and watch-load work as intended) |
(→{{header|Pike}}: translated from lisp) |
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(main (argv))</lang>
=={{header|Pike}}==
an almost direct translation from common lisp:
<lang Pike>mapping db = ([]);
mapping make_episode(string series, string title, string episode, array date)
{
return ([ "series":series, "episode":episode, "title":title, "date":date ]);
}
void print_episode(mapping episode)
{
write(" %-30s %10s %-30s (%{%d.%})\n", episode->series, episode->episode, episode->title, episode->date);
}
void print_series(mapping series)
{
write("%-30s %-10s\n", series->series, series->status);
map(series->episodes, print_episode);
}
void dump_db(mapping database)
{
foreach(database; string name; mapping series)
{
print_series(series);
}
}
array get_latest(mapping database)
{
array latest = ({});
foreach(database; string name; mapping series)
{
latest += ({ series->episodes[0] });
}
return latest;
}
int(0..1) compare_date(array a, array b)
{
if (!arrayp(a) && !arrayp(b)) return false;
if (!arrayp(a) || !sizeof(a)) return arrayp(b) && sizeof(b);
if (!arrayp(b) || !sizeof(b)) return arrayp(a) && sizeof(a);
if (a[0] == b[0]) return compare_date(a[1..], b[1..]);
return a[0] < b[0];
}
int(0..1) compare_by_date(mapping a, mapping b)
{
return compare_date(reverse(a->date), reverse(b->date));
}
void watch_list(mapping database)
{
map(Array.sort_array(get_latest(database), compare_by_date), print_episode);
}
string prompt_read(string prompt)
{
write("%s: ", prompt);
return Stdio.stdin.gets();
}
array parse_date(string date)
{
return (array(int))(date/".");
}
mapping prompt_for_episode()
{
return make_episode(prompt_read("Series"), prompt_read("Title"), prompt_read("Episode"), parse_date(prompt_read("Date watched")));
}
void save_db(string filename, mapping database)
{
Stdio.write_file(filename, sprintf("%O", database));
}
void watch_save()
{
save_db("pwatch", db);
}
mapping load_db(string filename)
{
if (file_stat(filename))
return compile_string("mixed data = "+Stdio.read_file(filename)+";")()->data;
else return ([]);
}
mapping get_series(string name, mapping database)
{
return database[name];
}
array get_episode_list(string series, mapping database)
{
return database[series]->episodes;
}
void watch_new_series(string name, string status, mapping database)
{
database[name] = (["series":name, "status":status, "episodes":({}) ]);
}
mapping get_or_add_series(string name, mapping database)
{
if (!database[name])
{
string answer = prompt_read("Add new series? [y/n]: ");
if (answer == "y")
watch_new_series(name, "active", database);
}
return database[name];
}
void watch_add(mapping database)
{
mapping episode = prompt_for_episode();
string series_name = episode->series;
mapping series = get_or_add_series(series_name, database);
if (!series)
watch_add(database);
else
series->episodes = Array.unshift(series->episodes, episode);
}
void watch_load()
{
db = load_db("pwatch");
}
int main(int argc, array argv)
{
watch_load();
if (argc>1 && argv[1] == "add")
{
watch_add(db);
watch_save();
}
else
watch_list(db);
}</lang>
=={{header|UNIX Shell}}==
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