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1 | package App::Web::Oof; | |
2 | ||
3 | use 5.014000; | |
4 | use strict; | |
5 | use warnings; | |
6 | use utf8; | |
7 | use parent qw/Plack::Component/; | |
8 | ||
9 | our $VERSION = '0.000_005'; | |
10 | ||
11 | use DBIx::Simple; | |
12 | use File::Slurp; | |
13 | use HTML::TreeBuilder; | |
14 | use HTML::Element::Library; | |
15 | use JSON::MaybeXS qw/encode_json decode_json/; | |
16 | use Plack::Builder; | |
17 | use Plack::Request; | |
18 | use Try::Tiny; | |
19 | ||
20 | sub HTML::Element::iter3 { | |
21 | my ($self, $data, $code) = @_; | |
22 | my $orig = $self; | |
23 | my $prev = $orig; | |
24 | for my $el (@$data) { | |
25 | my $current = $orig->clone; | |
26 | $code->($el, $current); | |
27 | $prev->postinsert($current); | |
28 | $prev = $current; | |
29 | } | |
30 | $orig->detach; | |
31 | } | |
32 | ||
33 | sub HTML::Element::fid { shift->look_down(id => shift) } | |
34 | sub HTML::Element::fclass { shift->look_down(class => qr/\b$_[0]\b/) } | |
35 | ||
36 | ################################################## | |
37 | ||
38 | my %db; | |
39 | my ($form, $continue, $order, $details, $pay); | |
40 | ||
41 | { | |
42 | sub parse_html { | |
43 | my $builder = HTML::TreeBuilder->new; | |
44 | $builder->ignore_unknown(0); | |
45 | $builder->parse_file("tmpl/$_[0].html"); | |
46 | $builder | |
47 | } | |
48 | ||
49 | $form = parse_html 'form'; | |
50 | $continue = parse_html 'continue'; | |
51 | $order = parse_html 'order'; | |
52 | $details = parse_html 'details'; | |
53 | $pay = parse_html 'pay'; | |
54 | } | |
55 | ||
56 | sub stringify_money { sprintf "£%.2f", $_[0] / 100 } | |
57 | ||
58 | sub make_slug { | |
59 | my $slug = $_[0]; | |
60 | $slug =~ y/ /-/; | |
61 | $slug =~ y/a-zA-Z0-9-//cd; | |
62 | $slug | |
63 | } | |
64 | ||
65 | our %highlight; | |
66 | sub form_table_row { | |
67 | my ($data, $tr) = @_; | |
68 | $tr->attr(class => 'highlight') if $highlight{$data->{product}}; | |
69 | $tr->fclass($_)->replace_content($data->{$_}) for qw/title subtitle stock/; | |
70 | $tr->fclass('price')->replace_content(stringify_money $data->{price}); | |
71 | $tr->fclass('freepost')->detach unless $data->{freepost}; | |
72 | $tr->fclass('title')->attr('data-product', $data->{product}); | |
73 | $tr->fclass('title')->attr('href', '/details/'.$data->{product}.'/'.make_slug $data->{title}); | |
74 | # $tr->fclass('title')->attr('data-summary', $data->{summary}); | |
75 | $tr->look_down(_tag => 'input')->attr(max => $data->{stock}); | |
76 | $tr->look_down(_tag => 'input')->attr(name => 'quant'.$data->{product}); | |
77 | } | |
78 | ||
79 | sub form_app { | |
80 | my ($env) = @_; | |
81 | $db{$$} //= DBIx::Simple->connect($ENV{OOF_DSN} // 'dbi:Pg:'); | |
82 | my $req = Plack::Request->new($env); | |
83 | ||
84 | local %highlight = map { $_ => 1 } $req->param('highlight'); | |
85 | my $data = $db{$$}->select(products => '*', {}, 'product')->hashes; | |
86 | my $tree = $form->clone; | |
87 | $tree->find('tbody')->find('tr')->iter3($data, \&form_table_row); | |
88 | ||
89 | [200, ['Content-type' => 'text/html; charset=utf-8'], [$tree->as_HTML]] | |
90 | } | |
91 | ||
92 | sub continue_table_row { | |
93 | my ($data, $tr) = @_; | |
94 | $tr->fclass($_)->replace_content($data->{$_}) for qw/title subtitle quantity/; | |
95 | $tr->fclass('freepost')->detach unless $data->{freepost}; | |
96 | $tr->fclass('price')->replace_content(stringify_money $data->{subtotal}); | |
97 | $tr->fclass('title')->attr('data-product', $data->{product}); | |
98 | } | |
99 | ||
100 | sub continue_app { | |
101 | my ($env) = @_; | |
102 | $db{$$} //= DBIx::Simple->connect($ENV{OOF_DSN} // 'dbi:Pg:'); | |
103 | my $tree = $continue->clone; | |
104 | my $req = Plack::Request->new($env); | |
105 | my $params = $req->body_parameters; | |
106 | ||
107 | my ($quant, $quant_freepost, $total, @data, @notes) = (0) x 3; | |
108 | for (sort keys %$params) { | |
109 | next unless /^quant/; | |
110 | next unless $params->{$_}; | |
111 | my $data = $db{$$}->select(products => '*', {product => substr $_, 5})->hash; | |
112 | $data->{quantity} = $params->{$_}; | |
113 | if ($data->{stock} == 0) { | |
114 | push @notes, 'Item is out of stock and was removed from order: '.$data->{title}; | |
115 | next | |
116 | } | |
117 | if ($data->{quantity} > $data->{stock}) { | |
118 | $data->{quantity} = $data->{stock}; | |
119 | push @notes, 'Not enough units of "'.$data->{title}.'" available. Quantity reduced to '.$data->{quantity} | |
120 | } | |
121 | $data->{subtotal} = $data->{price} * $data->{quantity}; | |
122 | $quant += $data->{quantity}; | |
123 | $quant_freepost += $data->{quantity} if $data->{freepost}; | |
124 | $total += $data->{subtotal}; | |
125 | push @data, $data | |
126 | } | |
127 | ||
128 | return [500, ['Content-type' => 'text/plain'], ['Error: no items in order.']] unless $quant; | |
129 | ||
130 | $tree->fid('subtotal')->replace_content(stringify_money $total); | |
131 | my $dvalue; | |
132 | if ($params->{discount}) { | |
133 | my $discount = $db{$$}->select(discounts => '*', {discount => $params->{discount}})->hash; | |
134 | if (!defined $discount) { | |
135 | push @notes, 'Discount code incorrect. No discount applied.' | |
136 | } elsif ($db{$$}->select(orders => 'COUNT(*)', {discount => $params->{discount}})->list) { | |
137 | push @notes, 'Discount code already used once. No discount applied.' | |
138 | } else { | |
139 | $dvalue = int (0.5 + $discount->{fraction} * $total) if $discount->{fraction}; | |
140 | $dvalue = $discount->{flat} if $discount->{flat}; | |
141 | $tree->fid('discount')->replace_content('-'.stringify_money $dvalue); | |
142 | $total -= $dvalue; | |
143 | $tree->look_down(name => 'discount')->attr(value => $params->{discount}); | |
144 | push @notes, 'Discount applied.' | |
145 | } | |
146 | } | |
147 | $tree->look_down(name => 'discount')->detach unless $dvalue; | |
148 | $tree->fid('discount_tr')->detach unless $dvalue; | |
149 | my $postage = 220 + 50 * ($quant - $quant_freepost); | |
150 | $postage = 0 if $quant == $quant_freepost; | |
151 | $tree->fid('postage')->replace_content(stringify_money $postage); | |
152 | $total += $postage; | |
153 | $tree->fid('total')->replace_content(stringify_money $total); | |
154 | ||
155 | $tree->fid('order')->find('tbody')->find('tr')->iter3(\@data, \&continue_table_row); | |
156 | $tree->iter($tree->fid('notes')->find('li') => @notes); | |
157 | ||
158 | $tree->look_down(name => 'products')->attr(value => encode_json \@data); | |
159 | $tree->look_down(name => 'total')->attr(value => $total); | |
160 | ||
161 | [200, ['Content-type' => 'text/html; charset=utf-8'], [$tree->as_HTML]] | |
162 | } | |
163 | ||
164 | sub order_app { | |
165 | my ($env) = @_; | |
166 | $db{$$} //= DBIx::Simple->connect($ENV{OOF_DSN} // 'dbi:Pg:'); | |
167 | my $tree = $order->clone; | |
168 | my $req = Plack::Request->new($env); | |
169 | my ($id) = $env->{PATH_INFO} =~ m,^/([0-9A-F]+),; | |
170 | if ($id) { | |
171 | my $total = $db{$$}->select(orders => 'total', {id => $id})->list or | |
172 | return [500, ['Content-type', 'text/plain'], ['Order not found']]; | |
173 | $tree->fid('orderid')->replace_content($id); | |
174 | $tree->look_down(name => 'order')->attr(value => $id); | |
175 | $tree->fid('total')->replace_content(stringify_money $total); | |
176 | $tree->find('script')->attr('data-amount', $total); | |
177 | return [200, ['Content-type' => 'text/html; charset=utf-8'], [$tree->as_HTML]] | |
178 | } else { | |
179 | my %parms = %{$req->body_parameters}; | |
180 | my $id = sprintf "%X%04X", time, $$; | |
181 | my $err; | |
182 | try { | |
183 | $db{$$}->begin_work; | |
184 | my $products = decode_json $req->body_parameters->{products}; | |
185 | for my $prod (@$products) { | |
186 | my $stock = $db{$$}->select(products => 'stock', {product => $prod->{product}})->list; | |
187 | die "Not enough of " .$prod->{title}."\n" if $prod->{quantity} > $stock; | |
188 | $db{$$}->update(products => {stock => $stock - $prod->{quantity}}, {product => $prod->{product}}); | |
189 | } | |
190 | $db{$$}->insert(orders => {id => $id, %parms}); | |
191 | $db{$$}->commit; | |
192 | } catch { | |
193 | $db{$$}->rollback; | |
194 | $err = [500, ['Content-type', 'text/plain'], ["Error: $_"]] | |
195 | }; | |
196 | return $err if $err; | |
197 | return [303, [Location => "/order/$id"], []] | |
198 | } | |
199 | } | |
200 | ||
201 | sub cancel { | |
202 | my ($order) = @_; | |
203 | $db{$$} //= DBIx::Simple->connect($ENV{OOF_DSN} // 'dbi:Pg:'); | |
204 | $order = $db{$$}->select(orders => '*', {id => $order})->hash; | |
205 | my $products = decode_json $order->{products}; | |
206 | $db{$$}->begin_work; | |
207 | try { | |
208 | for my $prod (@$products) { | |
209 | my $stock = $db{$$}->select(products => 'stock', {product => $prod->{product}})->list; | |
210 | $db{$$}->update(products => {stock => $stock + $prod->{quantity}}, {product => $prod->{product}}); | |
211 | } | |
212 | $db{$$}->delete(orders => {id => $order->{id}}); | |
213 | $db{$$}->commit; | |
214 | } catch { | |
215 | $db{$$}->rollback; | |
216 | die $_ | |
217 | } | |
218 | } | |
219 | ||
220 | sub details_list_element { | |
221 | my ($data, $li) = @_; | |
222 | $li->find('a')->attr(href => "/$data"); | |
223 | my $thumb = $data =~ s/fullpics/thumbs/r; | |
224 | $thumb = $data unless -f $thumb; | |
225 | $li->find('img')->attr(src => "/$thumb"); | |
226 | } | |
227 | ||
228 | sub details_app { | |
229 | my ($env) = @_; | |
230 | $db{$$} //= DBIx::Simple->connect($ENV{OOF_DSN} // 'dbi:Pg:'); | |
231 | my $tree = $details->clone; | |
232 | my ($id) = $env->{PATH_INFO} =~ m,^/(\d+),; | |
233 | my ($title, $summary) = $db{$$}->select(products => [qw/title summary/], {product => $id})->list; | |
234 | my @pics = <static/fullpics/$id-*>; | |
235 | my $slug = make_slug $title; | |
236 | $tree->find('title')->replace_content("Pictures of $title | ledparts4you"); | |
237 | $tree->find('h2')->replace_content($title); | |
238 | $tree->fid('summary')->replace_content($summary); | |
239 | $tree->look_down(rel => 'canonical')->attr(href => "/details/$id/$slug"); | |
240 | $tree->fid('pictures')->find('li')->iter3(\@pics, \&details_list_element); | |
241 | ||
242 | for my $ahref ($tree->find('a')) { | |
243 | $ahref->attr(href => "/form?highlight=$id") if $ahref->attr('href') eq '/'; | |
244 | } | |
245 | ||
246 | [200, ['Content-type' => 'text/html; charset=utf-8'], [$tree->as_HTML]] | |
247 | } | |
248 | ||
249 | sub pay_app { | |
250 | my ($env) = @_; | |
251 | my $req = Plack::Request->new($env); | |
252 | $db{$$} //= DBIx::Simple->connect($ENV{OOF_DSN} // 'dbi:Pg:'); | |
253 | my $order = $req->body_parameters->{order}; | |
254 | my $token = $req->body_parameters->{stripeToken}; | |
255 | return [500, ['Content-type' => 'text/html; charset=utf-8'], ['No token received, payment did not succeed.']] unless $token; | |
256 | $db{$$}->update(orders => {stripe_token => $token}, {id => $order}); | |
257 | [200, ['Content-type' => 'text/html; charset=utf-8'], [$pay->as_HTML]]; | |
258 | } | |
259 | ||
260 | sub app { | |
261 | my $footer = read_file 'tmpl/footer.html'; | |
262 | builder { | |
263 | enable sub { | |
264 | my $app = shift; | |
265 | sub { | |
266 | my $res = $app->(@_); | |
267 | $res->[2][0] =~ s,</body>,$footer</body>, if $res->[0] == 200; | |
268 | $res; | |
269 | } | |
270 | }; | |
271 | mount '/' => sub { [301, [Location => '/form'], []] }; | |
272 | mount '/form' => \&form_app; | |
273 | mount '/continue' => \&continue_app; | |
274 | mount '/order' => \&order_app; | |
275 | mount '/details' => \&details_app; | |
276 | mount '/pay' => \&pay_app; | |
277 | } | |
278 | } | |
279 | ||
280 | 1; | |
281 | __END__ | |
282 | ||
283 | =head1 NAME | |
284 | ||
285 | App::Web::Oof - Oversimplified order form / ecommerce website | |
286 | ||
287 | =head1 SYNOPSIS | |
288 | ||
289 | use App::Web::Oof; | |
290 | ||
291 | =head1 DESCRIPTION | |
292 | ||
293 | Oof (Oversimplified order form) is a very simple ecommerce website. | |
294 | It is the code behind L<https://ledparts4you.uk.to>. | |
295 | ||
296 | This version is reasonably functional, yet not very reusable, hence | |
297 | the version number. | |
298 | ||
299 | =head1 AUTHOR | |
300 | ||
301 | Marius Gavrilescu, E<lt>marius@ieval.roE<gt> | |
302 | ||
303 | =head1 COPYRIGHT AND LICENSE | |
304 | ||
305 | Copyright (C) 2016 by Marius Gavrilescu | |
306 | ||
307 | This library is free software; you can redistribute it and/or modify | |
308 | it under the same terms as Perl itself, either Perl version 5.22.1 or, | |
309 | at your option, any later version of Perl 5 you may have available. | |
310 | ||
311 | ||
312 | =cut |