1
|
|
|
<?php |
2
|
|
|
|
3
|
|
|
/* |
4
|
|
|
* This file is part of the PetkoparaCrudGeneratorBundle |
5
|
|
|
* |
6
|
|
|
* (c) Petko Petkov <[email protected]> |
7
|
|
|
* |
8
|
|
|
* For the full copyright and license information, please view the LICENSE |
9
|
|
|
* file that was distributed with this source code. |
10
|
|
|
*/ |
11
|
|
|
|
12
|
|
|
namespace Petkopara\CrudGeneratorBundle\Command; |
13
|
|
|
|
14
|
|
|
use Doctrine\Bundle\DoctrineBundle\Mapping\DisconnectedMetadataFactory; |
15
|
|
|
use Petkopara\CrudGeneratorBundle\Configuration\ConfigurationBuilder; |
16
|
|
|
use Petkopara\CrudGeneratorBundle\Generator\Guesser\MetadataGuesser; |
17
|
|
|
use Petkopara\CrudGeneratorBundle\Generator\PetkoparaCrudGenerator; |
18
|
|
|
use Petkopara\CrudGeneratorBundle\Generator\PetkoparaFilterGenerator; |
19
|
|
|
use Petkopara\CrudGeneratorBundle\Generator\PetkoparaFormGenerator; |
20
|
|
|
use Sensio\Bundle\GeneratorBundle\Command\AutoComplete\EntitiesAutoCompleter; |
21
|
|
|
use Sensio\Bundle\GeneratorBundle\Command\GenerateDoctrineCrudCommand; |
22
|
|
|
use Sensio\Bundle\GeneratorBundle\Command\Validators; |
23
|
|
|
use Symfony\Component\Config\Definition\Exception\Exception; |
24
|
|
|
use Symfony\Component\Console\Input\InputArgument; |
25
|
|
|
use Symfony\Component\Console\Input\InputInterface; |
26
|
|
|
use Symfony\Component\Console\Input\InputOption; |
27
|
|
|
use Symfony\Component\Console\Output\OutputInterface; |
28
|
|
|
use Symfony\Component\Console\Question\ConfirmationQuestion; |
29
|
|
|
use Symfony\Component\Console\Question\Question; |
30
|
|
|
use Symfony\Component\HttpKernel\Bundle\BundleInterface; |
31
|
|
|
use Symfony\Component\Yaml\Exception\RuntimeException; |
32
|
|
|
|
33
|
|
|
class CrudGeneratorCommand extends GenerateDoctrineCrudCommand |
34
|
|
|
{ |
35
|
|
|
|
36
|
|
|
const FILTER_TYPE_FORM = 'form'; |
37
|
|
|
const FILTER_TYPE_INPUT = 'input'; |
38
|
|
|
const FILTER_TYPE_NONE = 'none'; |
39
|
|
|
|
40
|
|
|
protected $generator; |
41
|
|
|
protected $formGenerator; |
42
|
|
|
private $filterGenerator; |
43
|
|
|
|
44
|
15 |
|
protected function configure() |
45
|
|
|
{ |
46
|
|
|
|
47
|
15 |
|
$this |
48
|
15 |
|
->setName('petkopara:generate:crud') |
49
|
15 |
|
->setDescription('A CRUD generator with pagination, filters, bulk delete and bootstrap markdown.') |
50
|
15 |
|
->setDefinition(array( |
51
|
15 |
|
new InputArgument('entity', InputArgument::OPTIONAL, 'The entity class name to initialize (shortcut notation)'), |
52
|
15 |
|
new InputOption('entity', '', InputOption::VALUE_REQUIRED, 'The entity class name to initialize (shortcut notation)'), |
53
|
15 |
|
new InputOption('route-prefix', 'r', InputOption::VALUE_REQUIRED, 'The route prefix'), |
54
|
15 |
|
new InputOption('template', 't', InputOption::VALUE_REQUIRED, 'The base template which will be extended by the templates', 'PetkoparaCrudGeneratorBundle::base.html.twig'), |
55
|
15 |
|
new InputOption('format', 'f', InputOption::VALUE_REQUIRED, 'The format used for configuration files (php, xml, yml, or annotation)', 'annotation'), |
56
|
15 |
|
new InputOption('overwrite', 'o', InputOption::VALUE_NONE, 'Overwrite any existing controller or form class when generating the CRUD contents'), |
57
|
15 |
|
new InputOption('bundle-views', 'b', InputOption::VALUE_NONE, 'Whether or not to store the view files in app/Resources/views/ or in bundle dir'), |
58
|
15 |
|
new InputOption('without-sorting', 'wsr', InputOption::VALUE_NONE, 'Whether or not have sorting in the index'), |
59
|
15 |
|
new InputOption('without-page-size', 'wps', InputOption::VALUE_NONE, 'Whether or not to show items per page select in the index'), |
60
|
15 |
|
new InputOption('without-write', 'ww', InputOption::VALUE_NONE, 'Whether or not to generate create, new and delete actions'), |
61
|
15 |
|
new InputOption('without-show', 'ws', InputOption::VALUE_NONE, 'Whether or not to generate create, new and delete actions'), |
62
|
15 |
|
new InputOption('without-bulk', 'wb', InputOption::VALUE_NONE, 'Whether or not to generate bulk actions'), |
63
|
15 |
|
new InputOption('filter-type', 'ft', InputOption::VALUE_REQUIRED, 'What type of filtrations to be used. Multi search input, Form filter or none', 'form'), |
64
|
15 |
|
)) |
65
|
15 |
|
->setHelp(<<<EOT |
66
|
|
|
The <info>%command.name%</info> command generates a CRUD based on a Doctrine entity. |
67
|
|
|
|
68
|
|
|
The default command only generates the list and show actions. |
69
|
|
|
|
70
|
|
|
<info>php %command.full_name% --entity=AcmeBlogBundle:Post --route-prefix=post_admin</info> |
71
|
|
|
|
72
|
|
|
Using the --without-write to not generate the new, edit, bulk and delete actions. |
73
|
|
|
|
74
|
|
|
Using the --bundle-views option store the view files in the bundles dir. |
75
|
|
|
|
76
|
|
|
Using the --without-bulk use this option tp not generate bulk actions code. |
77
|
|
|
|
78
|
|
|
Using the --template option allows to set base template from which the crud views to overide. |
79
|
|
|
|
80
|
|
|
<info>php %command.full_name% doctrine:generate:crud --entity=AcmeBlogBundle:Post --route-prefix=post_admin </info> |
81
|
|
|
|
82
|
|
|
Every generated file is based on a template. There are default templates but they can be overridden by placing custom templates in one of the following locations, by order of priority: |
83
|
|
|
|
84
|
|
|
<info>BUNDLE_PATH/Resources/PetkoparaCrudGeneratorBundle/skeleton/crud |
85
|
|
|
APP_PATH/Resources/PetkoparaCrudGeneratorBundle/skeleton/crud</info> |
86
|
|
|
|
87
|
|
|
And |
88
|
|
|
|
89
|
|
|
<info>BUNDLE_PATH/Resources/PetkoparaCrudGeneratorBundle/skeleton/form |
90
|
|
|
APP_PATH/Resources/PetkoparaCrudGeneratorBundle/skeleton/form</info> |
91
|
|
|
|
92
|
|
|
EOT |
93
|
15 |
|
); |
94
|
15 |
|
} |
95
|
|
|
|
96
|
|
|
protected function createGenerator($bundle = null) |
97
|
|
|
{ |
98
|
|
|
return new PetkoparaCrudGenerator($this->getContainer()->get('filesystem'), $this->getContainer()->getParameter('kernel.root_dir')); |
99
|
|
|
} |
100
|
|
|
|
101
|
|
|
protected function getSkeletonDirs(BundleInterface $bundle = null) |
102
|
|
|
{ |
103
|
|
|
$skeletonDirs = array(); |
104
|
|
|
if (isset($bundle) && is_dir($dir = $bundle->getPath() . '/Resources/PetkoparaCrudGeneratorBundle/skeleton')) { |
105
|
|
|
$skeletonDirs[] = $dir; |
106
|
|
|
} |
107
|
|
|
|
108
|
|
|
if (is_dir($dir = $this->getContainer()->get('kernel')->getRootdir() . '/Resources/PetkoparaCrudGeneratorBundle/skeleton')) { |
109
|
|
|
$skeletonDirs[] = $dir; |
110
|
|
|
} |
111
|
|
|
|
112
|
|
|
$skeletonDirs[] = $this->getContainer()->get('kernel')->locateResource('@PetkoparaCrudGeneratorBundle/Resources/skeleton'); |
113
|
|
|
$skeletonDirs[] = $this->getContainer()->get('kernel')->locateResource('@PetkoparaCrudGeneratorBundle/Resources'); |
114
|
|
|
|
115
|
|
|
return $skeletonDirs; |
116
|
|
|
} |
117
|
|
|
|
118
|
11 |
|
protected function interact(InputInterface $input, OutputInterface $output) |
119
|
|
|
{ |
120
|
|
|
|
121
|
11 |
|
$questionHelper = $this->getQuestionHelper(); |
122
|
11 |
|
$questionHelper->writeSection($output, 'Welcome to the Petkopara CRUD generator'); |
123
|
|
|
|
124
|
|
|
// namespace |
125
|
11 |
|
$output->writeln(array( |
126
|
11 |
|
'', |
127
|
11 |
|
'This command helps you generate CRUD controllers and templates.', |
128
|
11 |
|
'', |
129
|
11 |
|
'First, give the name of the existing entity for which you want to generate a CRUD', |
130
|
11 |
|
'(use the shortcut notation like <comment>AcmeBlogBundle:Post</comment>)', |
131
|
11 |
|
'', |
132
|
11 |
|
)); |
133
|
|
|
|
134
|
11 |
|
if ($input->hasArgument('entity') && $input->getArgument('entity') != '') { |
135
|
|
|
$input->setOption('entity', $input->getArgument('entity')); |
136
|
|
|
} |
137
|
|
|
|
138
|
11 |
|
$question = new Question($questionHelper->getQuestion('The Entity shortcut name', $input->getOption('entity')), $input->getOption('entity')); |
139
|
11 |
|
$question->setValidator(array('Sensio\Bundle\GeneratorBundle\Command\Validators', 'validateEntityName')); |
140
|
|
|
|
141
|
|
|
|
142
|
11 |
|
$autocompleter = new EntitiesAutoCompleter($this->getContainer()->get('doctrine')->getManager()); |
143
|
11 |
|
$autocompleteEntities = $autocompleter->getSuggestions(); |
144
|
11 |
|
$question->setAutocompleterValues($autocompleteEntities); |
145
|
11 |
|
$entity = $questionHelper->ask($input, $output, $question); |
146
|
|
|
|
147
|
11 |
|
$input->setOption('entity', $entity); |
148
|
11 |
|
list($bundle, $entity) = $this->parseShortcutNotation($entity); |
149
|
|
|
|
150
|
|
|
try { |
151
|
11 |
|
$entityClass = $this->getContainer()->get('doctrine')->getAliasNamespace($bundle) . '\\' . $entity; |
152
|
11 |
|
$this->getEntityMetadata($entityClass); |
153
|
11 |
|
} catch (\Exception $e) { |
154
|
|
|
throw new \RuntimeException(sprintf('Entity "%s" does not exist in the "%s" bundle. You may have mistyped the bundle name or maybe the entity doesn\'t exist yet (create it first with the "doctrine:generate:entity" command).', $entity, $bundle)); |
155
|
|
|
} |
156
|
|
|
|
157
|
|
|
// write? |
158
|
11 |
|
$withoutWrite = $input->getOption('without-write') ? true : false; //default false |
159
|
11 |
|
$output->writeln(array( |
160
|
11 |
|
'', |
161
|
11 |
|
'By default, the generator creates all actions: list and show, new, update, and delete.', |
162
|
11 |
|
'You can also skip it and to generate only "list and show" actions:', |
163
|
11 |
|
'', |
164
|
11 |
|
)); |
165
|
11 |
|
$question = new ConfirmationQuestion($questionHelper->getQuestion('Do you want to skip generating of the "write" actions', $withoutWrite ? 'yes' : 'no', '?', $withoutWrite), $withoutWrite); |
166
|
11 |
|
$withoutWrite = $questionHelper->ask($input, $output, $question); |
167
|
11 |
|
$input->setOption('without-write', $withoutWrite); |
168
|
|
|
|
169
|
|
|
// filters? |
170
|
11 |
|
$filterType = $input->getOption('filter-type'); |
171
|
11 |
|
$output->writeln(array( |
172
|
11 |
|
'', |
173
|
11 |
|
'By default, the generator generate filter code.', |
174
|
11 |
|
'<comment>form</comment> to use LexikFormFilterBundle to search in the entity.', |
175
|
11 |
|
'<comment>input</comment> to use PetkoparaMultiSearchBundle to search only with one input in the entity.', |
176
|
11 |
|
'<comment>none</comment> use this to not generate any filter code.', |
177
|
11 |
|
'', |
178
|
11 |
|
)); |
179
|
11 |
|
$question = new Question($questionHelper->getQuestion('Filter Type (form, input, none)', $filterType), $filterType); |
180
|
11 |
|
$question->setValidator(array('Petkopara\CrudGeneratorBundle\Command\CrudValidators', 'validateFilterType')); |
181
|
11 |
|
$filterType = $questionHelper->ask($input, $output, $question); |
182
|
11 |
|
$input->setOption('filter-type', $filterType); |
183
|
|
|
|
184
|
|
|
|
185
|
|
|
// template? |
186
|
11 |
|
$template = $input->getOption('template'); |
187
|
11 |
|
$output->writeln(array( |
188
|
11 |
|
'', |
189
|
11 |
|
'By default, the created views extends the CrudGeneratorBundle::base.html.twig', |
190
|
11 |
|
'You can also set your template which the views to extend, for example base.html.twig ', |
191
|
11 |
|
'', |
192
|
11 |
|
)); |
193
|
11 |
|
$question = new Question($questionHelper->getQuestion('Base template for the views', $template), $template); |
194
|
11 |
|
$template = $questionHelper->ask($input, $output, $question); |
195
|
11 |
|
$input->setOption('template', $template); |
196
|
|
|
|
197
|
|
|
|
198
|
|
|
// format |
199
|
11 |
|
$format = $input->getOption('format'); |
200
|
11 |
|
$output->writeln(array( |
201
|
11 |
|
'', |
202
|
11 |
|
'Determine the format to use for the generated CRUD.', |
203
|
11 |
|
'', |
204
|
11 |
|
)); |
205
|
11 |
|
$question = new Question($questionHelper->getQuestion('Configuration format (yml, xml, php, or annotation)', $format), $format); |
206
|
11 |
|
$question->setValidator(array('Sensio\Bundle\GeneratorBundle\Command\Validators', 'validateFormat')); |
207
|
11 |
|
$format = $questionHelper->ask($input, $output, $question); |
208
|
11 |
|
$input->setOption('format', $format); |
209
|
|
|
|
210
|
|
|
// route prefix |
211
|
11 |
|
$prefix = $this->getRoutePrefix($input, $entity); |
212
|
11 |
|
$output->writeln(array( |
213
|
11 |
|
'', |
214
|
11 |
|
'Determine the routes prefix (all the routes will be "mounted" under this', |
215
|
11 |
|
'prefix: /prefix/, /prefix/new, ...).', |
216
|
11 |
|
'', |
217
|
11 |
|
)); |
218
|
11 |
|
$prefix = $questionHelper->ask($input, $output, new Question($questionHelper->getQuestion('Routes prefix', '/' . $prefix), '/' . $prefix)); |
219
|
11 |
|
$input->setOption('route-prefix', $prefix); |
220
|
|
|
|
221
|
|
|
// summary |
222
|
11 |
|
$output->writeln(array( |
223
|
11 |
|
'', |
224
|
11 |
|
$this->getHelper('formatter')->formatBlock('Summary before generation', 'bg=blue;fg=white', true), |
|
|
|
|
225
|
11 |
|
'', |
226
|
11 |
|
sprintf('You are going to generate a CRUD controller for "<info>%s:%s</info>"', $bundle, $entity), |
227
|
11 |
|
sprintf('Using the "<info>%s</info>" format.', $format), |
228
|
11 |
|
sprintf('Route prefix "<info>%s</info>" format.', $prefix), |
229
|
11 |
|
sprintf('Base template "<info>%s</info>".', $template), |
230
|
11 |
|
sprintf('With write "<info>%s</info>".', (!$withoutWrite) ? 'yes' : 'no'), |
231
|
11 |
|
sprintf('Filters "<info>%s</info>".', $filterType), |
232
|
11 |
|
'', |
233
|
11 |
|
)); |
234
|
11 |
|
} |
235
|
|
|
|
236
|
|
|
/** |
237
|
|
|
* @see Command |
238
|
|
|
*/ |
239
|
15 |
|
protected function execute(InputInterface $input, OutputInterface $output) |
240
|
|
|
{ |
241
|
15 |
|
$questionHelper = $this->getQuestionHelper(); |
242
|
|
|
|
243
|
15 |
|
if ($input->isInteractive()) { |
244
|
11 |
|
$question = new ConfirmationQuestion($questionHelper->getQuestion('Do you confirm generation', 'yes', '?'), true); |
245
|
11 |
|
if (!$questionHelper->ask($input, $output, $question)) { |
246
|
|
|
$output->writeln('<error>Command aborted</error>'); |
247
|
|
|
return 1; |
248
|
|
|
} |
249
|
11 |
|
} |
250
|
|
|
|
251
|
15 |
|
$entity = Validators::validateEntityName($input->getOption('entity')); |
252
|
15 |
|
list($bundle, $entity) = $this->parseShortcutNotation($entity); |
253
|
|
|
|
254
|
|
|
//get the options |
255
|
15 |
|
$format = Validators::validateFormat($input->getOption('format')); |
256
|
15 |
|
$prefix = $this->getRoutePrefix($input, $entity); |
257
|
15 |
|
$withoutWrite = $input->getOption('without-write'); //default with write |
258
|
15 |
|
$filterType = CrudValidators::validateFilterType($input->getOption('filter-type')); |
259
|
15 |
|
$withoutBulk = $input->getOption('without-bulk'); |
260
|
15 |
|
$withoutShow = $input->getOption('without-show'); |
261
|
15 |
|
$withoutSorting = $input->getOption('without-sorting'); |
262
|
15 |
|
$withoutPageSize = $input->getOption('without-page-size'); |
263
|
15 |
|
$bundleViews = $input->getOption('bundle-views'); |
264
|
15 |
|
$template = $input->getOption('template'); |
265
|
|
|
|
266
|
15 |
|
$forceOverwrite = $input->getOption('overwrite'); |
267
|
|
|
|
268
|
15 |
|
$questionHelper->writeSection($output, 'CRUD generation'); |
269
|
|
|
|
270
|
|
|
try { |
271
|
15 |
|
$entityClass = $this->getContainer()->get('doctrine')->getAliasNamespace($bundle) . '\\' . $entity; |
272
|
15 |
|
$metadata = $this->getEntityMetadata($entityClass); |
273
|
15 |
|
} catch (Exception $e) { |
274
|
|
|
throw new RuntimeException(sprintf('Entity "%s" does not exist in the "%s" bundle. Create it with the "doctrine:generate:entity" command and then execute this command again.', $entity, $bundle)); |
275
|
|
|
} |
276
|
|
|
|
277
|
15 |
|
$bundle = $this->getContainer()->get('kernel')->getBundle($bundle); |
278
|
|
|
|
279
|
|
|
|
280
|
15 |
|
$configBuilder = new ConfigurationBuilder(); |
281
|
|
|
$configuration = $configBuilder |
282
|
15 |
|
->setBaseTemplate($template) |
283
|
15 |
|
->setBundleViews($bundleViews) |
284
|
15 |
|
->setFilterType($filterType) |
285
|
15 |
|
->setWithoutWrite($withoutWrite) |
286
|
15 |
|
->setWithoutBulk($withoutBulk) |
287
|
15 |
|
->setWithoutShow($withoutShow) |
288
|
15 |
|
->setWithoutSorting($withoutSorting) |
289
|
15 |
|
->setWithoutPageSize($withoutPageSize) |
290
|
15 |
|
->setOverwrite($forceOverwrite) |
291
|
15 |
|
->setFormat($format) |
292
|
15 |
|
->setRoutePrefix($prefix) |
293
|
15 |
|
->getConfiguration() |
294
|
15 |
|
; |
295
|
15 |
|
$generator = $this->getGenerator($bundle); |
296
|
|
|
|
297
|
15 |
|
$generator->generateCrud($bundle, $entity, $metadata[0], $configuration); |
298
|
|
|
|
299
|
15 |
|
$output->writeln('Generating the CRUD code: <info>OK</info>'); |
300
|
|
|
|
301
|
15 |
|
$errors = array(); |
302
|
15 |
|
$runner = $questionHelper->getRunner($output, $errors); |
303
|
|
|
|
304
|
|
|
// form |
305
|
15 |
|
if ($withoutWrite === false) { |
306
|
13 |
|
$this->generateForm($bundle, $entity, $metadata, $forceOverwrite); |
307
|
13 |
|
$output->writeln('Generating the Form code: <info>OK</info>'); |
308
|
13 |
|
} |
309
|
|
|
|
310
|
15 |
|
if ($filterType !== self::FILTER_TYPE_NONE) { |
311
|
|
|
|
312
|
14 |
|
$this->generateFilter($bundle, $entity, $metadata, $forceOverwrite, $filterType); |
313
|
14 |
|
$output->writeln('Generating the Filter code: <info>OK</info>'); |
314
|
14 |
|
} |
315
|
|
|
// routing |
316
|
15 |
|
$output->write('Updating the routing: '); |
317
|
15 |
|
if ('annotation' != $format) { |
318
|
4 |
|
$runner($this->updateRouting($questionHelper, $input, $output, $bundle, $format, $entity, $prefix)); |
319
|
4 |
|
} else { |
320
|
11 |
|
$runner($this->updateAnnotationRouting($bundle, $entity, $prefix)); |
321
|
|
|
} |
322
|
|
|
|
323
|
15 |
|
$questionHelper->writeGeneratorSummary($output, $errors); |
324
|
15 |
|
} |
325
|
|
|
|
326
|
|
|
/** |
327
|
|
|
* Tries to generate filtlers if they don't exist yet and if we need write operations on entities. |
328
|
|
|
* @param string $entity |
329
|
|
|
*/ |
330
|
14 |
|
protected function generateFilter($bundle, $entity, $metadata, $forceOverwrite = false, $type = self::FILTER_TYPE_INPUT) |
331
|
|
|
{ |
332
|
14 |
|
$this->getFilterGenerator($bundle)->generate($bundle, $entity, $metadata[0], $forceOverwrite, $type); |
333
|
14 |
|
} |
334
|
|
|
|
335
|
14 |
View Code Duplication |
protected function getFilterGenerator($bundle = null) |
|
|
|
|
336
|
|
|
{ |
337
|
14 |
|
if (null === $this->filterGenerator) { |
338
|
|
|
$metadataGuesser = new MetadataGuesser(new DisconnectedMetadataFactory($this->getContainer()->get('doctrine'))); |
339
|
|
|
$this->filterGenerator = new PetkoparaFilterGenerator($metadataGuesser); |
340
|
|
|
$this->filterGenerator->setSkeletonDirs($this->getSkeletonDirs($bundle)); |
341
|
|
|
} |
342
|
|
|
|
343
|
14 |
|
return $this->filterGenerator; |
344
|
|
|
} |
345
|
|
|
|
346
|
13 |
View Code Duplication |
protected function getFormGenerator($bundle = null) |
|
|
|
|
347
|
|
|
{ |
348
|
13 |
|
if (null === $this->formGenerator) { |
349
|
|
|
$metadataGuesser = new MetadataGuesser(new DisconnectedMetadataFactory($this->getContainer()->get('doctrine'))); |
350
|
|
|
$this->formGenerator = new PetkoparaFormGenerator($metadataGuesser); |
351
|
|
|
$this->formGenerator->setSkeletonDirs($this->getSkeletonDirs($bundle)); |
352
|
|
|
} |
353
|
|
|
|
354
|
13 |
|
return $this->formGenerator; |
355
|
|
|
} |
356
|
|
|
|
357
|
15 |
|
public function setFilterGenerator(PetkoparaFilterGenerator $filterGenerator) |
358
|
|
|
{ |
359
|
15 |
|
$this->filterGenerator = $filterGenerator; |
360
|
15 |
|
} |
361
|
|
|
|
362
|
15 |
|
public function setFormCrudGenerator(PetkoparaFormGenerator $formGenerator) |
363
|
|
|
{ |
364
|
15 |
|
$this->formGenerator = $formGenerator; |
365
|
15 |
|
} |
366
|
|
|
|
367
|
|
|
} |
368
|
|
|
|
Let’s take a look at an example:
In the above example, the authenticate() method works fine as long as you just pass instances of MyUser. However, if you now also want to pass a different implementation of User which does not have a getDisplayName() method, the code will break.
Available Fixes
Change the type-hint for the parameter:
Add an additional type-check:
Add the method to the interface: