[Web][Postfix] Add mail policies: per-recipient send/receive rules for mailboxes and groups

tests/php/Support/FakeMailPolicyLookup.php

@@ -0,0 +1,90 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Mailcow\Tests\Support;
+
+use Mailcow\MailPolicy\Model\Policy;
+use Mailcow\MailPolicy\Repository\LookupRepository;
+
+/**
+ * Address tables and policy assignments in memory, with the conditions of the SQL already applied
+ * (only active rows are listed).
+ */
+class FakeMailPolicyLookup extends LookupRepository
+{
+    /** username => domain */
+    public array $mailboxes = [];
+    /** alias domain => target domain */
+    public array $aliasDomains = [];
+    /** @var string[] domains of the mailcow (without alias domains) */
+    public array $domains = [];
+    /** id => ['address' => ?string, 'members' => string[]] */
+    public array $groups = [];
+    /** alias address => domain of aliases with the internal flag */
+    public array $internalAliases = [];
+    /** username => Policy[] assigned directly */
+    public array $mailboxPolicies = [];
+    /** group id => Policy[] */
+    public array $groupPolicies = [];
+
+    public function __construct()
+    {
+    }
+
+    public function mailbox(string $username): ?array
+    {
+        return isset($this->mailboxes[$username]) ? ['username' => $username, 'domain' => $this->mailboxes[$username]] : null;
+    }
+
+    public function aliasDomainTarget(string $domain): ?string
+    {
+        return $this->aliasDomains[$domain] ?? null;
+    }
+
+    public function isLocalDomain(string $domain): bool
+    {
+        return in_array($domain, $this->domains, true) || isset($this->aliasDomains[$domain]);
+    }
+
+    public function groupByAddress(string $address): ?int
+    {
+        foreach ($this->groups as $id => $group) {
+            if (($group['address'] ?? null) === $address) {
+                return $id;
+            }
+        }
+        return null;
+    }
+
+    public function groupAddress(int $id): ?string
+    {
+        return $this->groups[$id]['address'] ?? null;
+    }
+
+    public function isGroupMember(int $groupId, string $username): bool
+    {
+        return in_array($username, $this->groups[$groupId]['members'] ?? [], true);
+    }
+
+    public function internalAlias(string $address): ?string
+    {
+        return $this->internalAliases[$address] ?? null;
+    }
+
+    public function policiesForMailbox(string $username): array
+    {
+        $policies = $this->mailboxPolicies[$username] ?? [];
+        foreach ($this->groups as $id => $group) {
+            if (in_array($username, $group['members'] ?? [], true)) {
+                $policies = array_merge($policies, $this->groupPolicies[$id] ?? []);
+            }
+        }
+        return $policies;
+    }
+
+    public function policiesForGroup(int $groupId): array
+    {
+        return $this->groupPolicies[$groupId] ?? [];
+    }
+}