Introduce class ModuleDependency

modules/setup/library/Setup/ModuleDependency.php

@@ -0,0 +1,99 @@
+<?php
+
+namespace Icinga\Module\Setup;
+
+use Icinga\Application\Modules\Module;
+use Icinga\Module\Setup\Requirement\ModuleMissingRequirement;
+use Icinga\Module\Setup\Requirement\SetRequirement;
+use Icinga\Module\Setup\Requirement\WebModuleRequirement;
+
+class ModuleDependency
+{
+    /** @var Module The given Module */
+    protected $module;
+
+    /** @var array The chosen modules */
+    protected $checkedModules;
+
+    /**
+     * @param Module $module The given module
+     *
+     * @param array $checkedModules The checked modules from module page
+     */
+    public function __construct(Module $module, array $checkedModules)
+    {
+        $this->module = $module;
+        $this->checkedModules = $checkedModules;
+    }
+
+    /**
+     * Get the module dependency requirements
+     *
+     * @return RequirementSet
+     */
+    public function getRequirements()
+    {
+        $icingadbAndMonitoring = [];
+        $set = new RequirementSet();
+
+        foreach ($this->module->getRequiredModules() as $name => $requiredVersion) {
+            if ($name === 'monitoring' || $name === 'icingadb') {
+                $icingadbAndMonitoring[$name] = $requiredVersion;
+
+                continue;
+            }
+
+            $options = [
+                'alias'         => $name,
+                'description'   => sprintf(
+                    t('Module %s (%s) is required.'),
+                    $name,
+                    $requiredVersion
+                )
+            ];
+
+            if (! in_array($name, $this->checkedModules)) {
+                $set->add(new ModuleMissingRequirement($options));
+            } else {
+                $options['condition'] = [$name, $requiredVersion];
+                $set->add(new WebModuleRequirement($options));
+            }
+        }
+
+        if (! empty($icingadbAndMonitoring)) {
+            $icingadbOrMonitoring = new RequirementSet(false, RequirementSet::MODE_OR);
+            foreach ($icingadbAndMonitoring as $name => $requiredVersion) {
+                $options = [
+                    'alias'         => $name,
+                    'optional'      => true,
+                    'description'   => sprintf(
+                        t('Module %s (%s) is required.'),
+                        $name,
+                        $requiredVersion
+                    )
+                ];
+
+                if (! in_array($name, $this->checkedModules)) {
+                    $icingadbOrMonitoring->add(new ModuleMissingRequirement($options));
+                } else {
+                    $options['condition'] = [$name, $requiredVersion];
+                    $icingadbOrMonitoring->add(new WebModuleRequirement($options));
+                }
+            }
+
+            $set->merge($icingadbOrMonitoring);
+
+            $requirement = (new SetRequirement([
+                'title'         =>'Base Module',
+                'alias'         => 'Monitoring OR Icingadb',
+                'optional'      => false,
+                'condition'     => $icingadbOrMonitoring,
+                'description'   => t('Module Monitoring OR Icingadb is required.')
+            ]));
+
+            $set->add($requirement);
+        }
+
+        return $set;
+    }
+}