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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 $VERSION = '0.000_002'; | |
10 | ||
11 | use DBIx::Simple; | |
12 | use File::Slurp; | |
13 | use HTML::TreeBuilder; | |
14 | use HTML::Element::Library; | |
15 | use JSON::MaybeXS qw/encode_json decode_json/; | |
16 | use Plack::Builder; | |
17 | use Plack::Request; | |
18 | use Try::Tiny; | |
19 | ||
20 | sub HTML::Element::iter3 { | |
21 | my ($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 | $slug | |
63 | } | |
64 | ||
65 | sub form_table_row { | |
66 | my ($data, $tr) = @_; | |
67 | $tr->fclass($_)->replace_content($data->{$_}) for qw/title subtitle stock/; | |
68 | $tr->fclass('price')->replace_content(stringify_money $data->{price}); | |
69 | $tr->fclass('title')->attr('data-product', $data->{product}); | |
70 | $tr->fclass('title')->attr('href', '/details/'.$data->{product}.'/'.make_slug $data->{title}); | |
71 | # $tr->fclass('title')->attr('data-summary', $data->{summary}); | |
72 | $tr->look_down(_tag => 'input')->attr(max => $data->{stock}); | |
73 | $tr->look_down(_tag => 'input')->attr(name => 'quant'.$data->{product}); | |
74 | } | |
75 | ||
76 | sub form_app { | |
77 | my ($env) = @_; | |
78 | $db{$$} //= DBIx::Simple->connect($ENV{OOF_DSN} // 'dbi:Pg:'); | |
79 | ||
80 | my $data = $db{$$}->select(products => '*', {}, 'product')->hashes; | |
81 | my $tree = $form->clone; | |
82 | $tree->find('tbody')->find('tr')->iter3($data, \&form_table_row); | |
83 | ||
84 | [200, ['Content-type' => 'text/html; charset=utf-8'], [$tree->as_HTML]] | |
85 | } | |
86 | ||
87 | sub continue_table_row { | |
88 | my ($data, $tr) = @_; | |
89 | $tr->fclass($_)->replace_content($data->{$_}) for qw/title subtitle quantity/; | |
90 | $tr->fclass('price')->replace_content(stringify_money $data->{subtotal}); | |
91 | $tr->fclass('title')->attr('data-product', $data->{product}); | |
92 | } | |
93 | ||
94 | sub continue_app { | |
95 | my ($env) = @_; | |
96 | $db{$$} //= DBIx::Simple->connect($ENV{OOF_DSN} // 'dbi:Pg:'); | |
97 | my $tree = $continue->clone; | |
98 | my $req = Plack::Request->new($env); | |
99 | my $params = $req->body_parameters; | |
100 | ||
101 | my ($quant, $total, @data, @notes); | |
102 | for (sort keys %$params) { | |
103 | next unless /^quant/; | |
104 | next unless $params->{$_}; | |
105 | my $data = $db{$$}->select(products => '*', {product => substr $_, 5})->hash; | |
106 | $data->{quantity} = $params->{$_}; | |
107 | if ($data->{stock} == 0) { | |
108 | push @notes, 'Item is out of stock and was removed from order: '.$data->{title}; | |
109 | next | |
110 | } | |
111 | if ($data->{quantity} > $data->{stock}) { | |
112 | $data->{quantity} = $data->{stock}; | |
113 | push @notes, 'Not enough units of "'.$data->{title}.'" available. Quantity reduced to '.$data->{quantity} | |
114 | } | |
115 | $data->{subtotal} = $data->{price} * $data->{quantity}; | |
116 | $quant += $data->{quantity}; | |
117 | $total += $data->{subtotal}; | |
118 | push @data, $data | |
119 | } | |
120 | ||
121 | return [500, ['Content-type' => 'text/plain'], ['Error: no items in order.']] unless $quant; | |
122 | ||
123 | $tree->fid('subtotal')->replace_content(stringify_money $total); | |
124 | my $dvalue; | |
125 | if ($params->{discount}) { | |
126 | my $discount = $db{$$}->select(discounts => '*', {discount => $params->{discount}})->hash; | |
127 | if (!defined $discount) { | |
128 | push @notes, 'Discount code incorrect. No discount applied.' | |
129 | } elsif ($db{$$}->select(orders => 'COUNT(*)', {discount => $params->{discount}})->list) { | |
130 | push @notes, 'Discount code already used once. No discount applied.' | |
131 | } else { | |
132 | $dvalue = int (0.5 + $discount->{fraction} * $total) if $discount->{fraction}; | |
133 | $dvalue = $discount->{flat} if $discount->{flat}; | |
134 | $tree->fid('discount')->replace_content('-'.stringify_money $dvalue); | |
135 | $total -= $dvalue; | |
136 | $tree->look_down(name => 'discount')->attr(value => $params->{discount}); | |
137 | push @notes, 'Discount applied.' | |
138 | } | |
139 | } | |
140 | $tree->look_down(name => 'discount')->detach unless $dvalue; | |
141 | $tree->fid('discount_tr')->detach unless $dvalue; | |
142 | my $postage = 220 + 50 * $quant; | |
143 | $tree->fid('postage')->replace_content(stringify_money $postage); | |
144 | $total += $postage; | |
145 | $tree->fid('total')->replace_content(stringify_money $total); | |
146 | ||
147 | $tree->fid('order')->find('tbody')->find('tr')->iter3(\@data, \&continue_table_row); | |
148 | $tree->iter($tree->fid('notes')->find('li') => @notes); | |
149 | ||
150 | $tree->look_down(name => 'products')->attr(value => encode_json \@data); | |
151 | $tree->look_down(name => 'total')->attr(value => $total); | |
152 | ||
153 | [200, ['Content-type' => 'text/html; charset=utf-8'], [$tree->as_HTML]] | |
154 | } | |
155 | ||
156 | sub order_app { | |
157 | my ($env) = @_; | |
158 | $db{$$} //= DBIx::Simple->connect($ENV{OOF_DSN} // 'dbi:Pg:'); | |
159 | my $tree = $order->clone; | |
160 | my $req = Plack::Request->new($env); | |
161 | my ($id) = $env->{PATH_INFO} =~ m,^/([0-9A-F]+),; | |
162 | if ($id) { | |
163 | my $total = $db{$$}->select(orders => 'total', {id => $id})->list; | |
164 | $tree->fid('orderid')->replace_content($id); | |
165 | $tree->look_down(name => 'order')->attr(value => $id); | |
166 | $tree->fid('total')->replace_content(stringify_money $total); | |
167 | $tree->find('script')->attr('data-amount', $total); | |
168 | return [200, ['Content-type' => 'text/html; charset=utf-8'], [$tree->as_HTML]] | |
169 | } else { | |
170 | my %parms = %{$req->body_parameters}; | |
171 | my $id = sprintf "%X%04X", time, $$; | |
172 | my $err; | |
173 | try { | |
174 | $db{$$}->begin_work; | |
175 | my $products = decode_json $req->body_parameters->{products}; | |
176 | for my $prod (@$products) { | |
177 | my $stock = $db{$$}->select(products => 'stock', {product => $prod->{product}})->list; | |
178 | die "Not enough of " .$prod->{title}."\n" if $prod->{quantity} > $stock; | |
179 | $db{$$}->update(products => {stock => $stock - $prod->{quantity}}, {product => $prod->{product}}); | |
180 | } | |
181 | $db{$$}->insert(orders => {id => $id, %parms}); | |
182 | $db{$$}->commit; | |
183 | } catch { | |
184 | $db{$$}->rollback; | |
185 | $err = [500, ['Content-type', 'text/plain'], ["Error: $_"]] | |
186 | }; | |
187 | return $err if $err; | |
188 | return [303, [Location => "/order/$id"], []] | |
189 | } | |
190 | } | |
191 | ||
192 | sub details_list_element { | |
193 | my ($data, $li) = @_; | |
194 | $li->find('a')->attr(href => "/$data"); | |
195 | my $thumb = $data =~ s/fullpics/thumbs/r; | |
196 | $thumb = $data unless -f $thumb; | |
197 | $li->find('img')->attr(src => "/$thumb"); | |
198 | } | |
199 | ||
200 | sub details_app { | |
201 | my ($env) = @_; | |
202 | $db{$$} //= DBIx::Simple->connect($ENV{OOF_DSN} // 'dbi:Pg:'); | |
203 | my $tree = $details->clone; | |
204 | my ($id) = $env->{PATH_INFO} =~ m,^/(\d+),; | |
205 | my $title = $db{$$}->select(products => 'title', {product => $id})->list; | |
206 | my @pics = <static/fullpics/$id-*>; | |
207 | my $slug = make_slug $title; | |
208 | $tree->find('title')->replace_content("Pictures of $title"); | |
209 | $tree->find('h2')->replace_content($title); | |
210 | $tree->look_down(rel => 'canonical')->attr(href => "/details/$id/$slug"); | |
211 | $tree->fid('pictures')->iter3(\@pics, \&details_list_element); | |
212 | ||
213 | [200, ['Content-type' => 'text/html; charset=utf-8'], [$tree->as_HTML]] | |
214 | } | |
215 | ||
216 | sub pay_app { | |
217 | my ($env) = @_; | |
218 | my $req = Plack::Request->new($env); | |
219 | $db{$$} //= DBIx::Simple->connect($ENV{OOF_DSN} // 'dbi:Pg:'); | |
220 | my $order = $req->body_parameters->{order}; | |
221 | my $token = $req->body_parameters->{stripeToken}; | |
222 | return [500, ['Content-type' => 'text/html; charset=utf-8'], ['No token received, payment did not succeed.']] unless $token; | |
223 | $db{$$}->update(orders => {stripe_token => $token}, {id => $order}); | |
224 | [200, ['Content-type' => 'text/html; charset=utf-8'], [$pay->as_HTML]]; | |
225 | } | |
226 | ||
227 | sub app { | |
228 | my $footer = read_file 'tmpl/footer.html'; | |
229 | builder { | |
230 | enable sub { | |
231 | my $app = shift; | |
232 | sub { | |
233 | my $res = $app->(@_); | |
234 | push @{$res->[2]}, $footer; | |
235 | $res; | |
236 | } | |
237 | }; | |
238 | mount '/' => sub { [301, [Location => '/form'], []] }; | |
239 | mount '/form' => \&form_app; | |
240 | mount '/continue' => \&continue_app; | |
241 | mount '/order' => \&order_app; | |
242 | mount '/details' => \&details_app; | |
243 | mount '/pay' => \&pay_app; | |
244 | } | |
245 | } | |
246 | ||
247 | 1; | |
248 | __END__ | |
249 | ||
250 | =head1 NAME | |
251 | ||
252 | App::Web::Oof - Oversimplified order form / ecommerce website | |
253 | ||
254 | =head1 SYNOPSIS | |
255 | ||
256 | use App::Web::Oof; | |
257 | ||
258 | =head1 DESCRIPTION | |
259 | ||
260 | Oof (Oversimplified order form) is a very simple ecommerce website. | |
261 | It is the code behind L<https://ledparts4you.uk.to>. | |
262 | ||
263 | This version is reasonably functional, yet not very reusable, hence | |
264 | the version number. | |
265 | ||
266 | =head1 AUTHOR | |
267 | ||
268 | Marius Gavrilescu, E<lt>marius@ieval.roE<gt> | |
269 | ||
270 | =head1 COPYRIGHT AND LICENSE | |
271 | ||
272 | Copyright (C) 2016 by Marius Gavrilescu | |
273 | ||
274 | This library is free software; you can redistribute it and/or modify | |
275 | it under the same terms as Perl itself, either Perl version 5.22.1 or, | |
276 | at your option, any later version of Perl 5 you may have available. | |
277 | ||
278 | ||
279 | =cut |