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| 1 | <?php |
| 2 | |
| 3 | declare(strict_types=1); |
| 4 | |
| 5 | /** @license For full copyright and license information, please see the LICENSE.md file. */ |
| 6 | |
| 7 | namespace App\Modules\Mail\Application\Service\Folder; |
| 8 | |
| 9 | defined('AMMONLY_APP') || exit('Direct script access is forbidden.'); |
| 10 | |
| 11 | use App\Modules\Mail\Domain\Model\ClientMailbox; |
| 12 | use App\Modules\Mail\Domain\Model\MailFolderDto; |
| 13 | |
| 14 | /** |
| 15 | * Webmail folder hierarchy tree builder and ordering service. |
| 16 | * |
| 17 | * Constructs nested parent-child folder structures, applies special-use roles |
| 18 | * (inbox, sent, drafts, archive, spam, trash), and orders siblings according |
| 19 | * to system priorities and custom user arrangements. |
| 20 | * |
| 21 | * @package App\Modules\Mail\Application\Service\Folder |
| 22 | */ |
| 23 | final readonly class WebmailFolderTreeBuilder |
| 24 | { |
| 25 | /** |
| 26 | * Applies mailbox-specific configured special use roles to folder list. |
| 27 | * |
| 28 | * @param array<MailFolderDto> $folders Raw folder tree. |
| 29 | * @param ClientMailbox $mailbox Mailbox definition with mappings. |
| 30 | * @param bool $isChild Whether current recursion level is inside a parent folder. |
| 31 | * @return array<MailFolderDto> Folders with updated special-use roles. |
| 32 | */ |
| 33 | public function applySpecialUseMappings( |
| 34 | array $folders, |
| 35 | ClientMailbox $mailbox, |
| 36 | bool $isChild = false |
| 37 | ): array { |
| 38 | $result = []; |
| 39 | |
| 40 | foreach ($folders as $folder) { |
| 41 | $role = $this->resolveSpecialUseRole($folder, $mailbox, $isChild); |
| 42 | $children = $folder->children !== [] |
| 43 | ? $this->applySpecialUseMappings($folder->children, $mailbox, true) |
| 44 | : []; |
| 45 | |
| 46 | $result[] = new MailFolderDto( |
| 47 | id: $folder->id, |
| 48 | name: $folder->name, |
| 49 | path: $folder->path, |
| 50 | delimiter: $folder->delimiter, |
| 51 | attributes: $folder->attributes, |
| 52 | specialUse: $role, |
| 53 | totalMessages: $folder->totalMessages, |
| 54 | unseenMessages: $folder->unseenMessages, |
| 55 | uidNext: $folder->uidNext, |
| 56 | uidValidity: $folder->uidValidity, |
| 57 | highestModseq: $folder->highestModseq, |
| 58 | children: $children |
| 59 | ); |
| 60 | } |
| 61 | |
| 62 | return $result; |
| 63 | } |
| 64 | |
| 65 | /** |
| 66 | * Resolves special-use role for a folder based on mailbox configured mappings. |
| 67 | * |
| 68 | * @param MailFolderDto $folder Folder instance. |
| 69 | * @param ClientMailbox $mailbox Mailbox definition. |
| 70 | * @param bool $isChild Whether folder is a child folder. |
| 71 | * @return string|null Resolved role name. |
| 72 | */ |
| 73 | public function resolveSpecialUseRole( |
| 74 | MailFolderDto $folder, |
| 75 | ClientMailbox $mailbox, |
| 76 | bool $isChild |
| 77 | ): ?string { |
| 78 | if ($isChild) { |
| 79 | return null; |
| 80 | } |
| 81 | |
| 82 | return match ($folder->path) { |
| 83 | $mailbox->folderSent => 'sent', |
| 84 | $mailbox->folderDrafts => 'drafts', |
| 85 | $mailbox->folderTrash => 'trash', |
| 86 | $mailbox->folderSpam => 'spam', |
| 87 | $mailbox->folderArchive => 'archive', |
| 88 | $mailbox->folderInbox => 'inbox', |
| 89 | default => $folder->specialUse, |
| 90 | }; |
| 91 | } |
| 92 | |
| 93 | /** |
| 94 | * Constructs recursive folder hierarchy and sorts sibling nodes by custom order. |
| 95 | * |
| 96 | * @param array<MailFolderDto> $flatFolders Flat list of folders. |
| 97 | * @param array<string>|null $orderConfig Saved folder order array. |
| 98 | * @return array<MailFolderDto> Nested and sorted tree nodes. |
| 99 | */ |
| 100 | public function buildFolderHierarchy(array $flatFolders, ?array $orderConfig = null): array |
| 101 | { |
| 102 | $byPath = []; |
| 103 | foreach ($flatFolders as $f) { |
| 104 | $byPath[$f->path] = $f; |
| 105 | } |
| 106 | |
| 107 | $childrenMap = []; |
| 108 | foreach ($flatFolders as $f) { |
| 109 | $delim = $f->delimiter !== '' ? $f->delimiter : '/'; |
| 110 | $lastDelim = strrpos($f->path, $delim); |
| 111 | $parentPath = $lastDelim !== false ? substr($f->path, 0, $lastDelim) : null; |
| 112 | if ($parentPath !== null && !isset($byPath[$parentPath])) { |
| 113 | $parentPath = null; |
| 114 | } |
| 115 | $childrenMap[$parentPath][] = $f; |
| 116 | } |
| 117 | |
| 118 | return $this->assembleHierarchyNode(null, $childrenMap, $orderConfig); |
| 119 | } |
| 120 | |
| 121 | /** |
| 122 | * Recursively builds tree nodes and applies sibling ordering. |
| 123 | * |
| 124 | * @param string|null $parentPath Current parent path. |
| 125 | * @param array<string|null, array<MailFolderDto>> $childrenMap Grouped children map. |
| 126 | * @param array<string>|null $orderConfig Custom order list. |
| 127 | * @return array<MailFolderDto> Sorted children DTOs with their nested subfolders. |
| 128 | */ |
| 129 | private function assembleHierarchyNode(?string $parentPath, array $childrenMap, ?array $orderConfig): array |
| 130 | { |
| 131 | $items = $childrenMap[$parentPath] ?? []; |
| 132 | if ($items === []) { |
| 133 | return []; |
| 134 | } |
| 135 | |
| 136 | $result = []; |
| 137 | foreach ($items as $item) { |
| 138 | $children = $this->assembleHierarchyNode($item->path, $childrenMap, $orderConfig); |
| 139 | $result[] = new MailFolderDto( |
| 140 | id: $item->id, |
| 141 | name: $item->name, |
| 142 | path: $item->path, |
| 143 | delimiter: $item->delimiter, |
| 144 | attributes: $item->attributes, |
| 145 | specialUse: $item->specialUse, |
| 146 | totalMessages: $item->totalMessages, |
| 147 | unseenMessages: $item->unseenMessages, |
| 148 | uidNext: $item->uidNext, |
| 149 | uidValidity: $item->uidValidity, |
| 150 | highestModseq: $item->highestModseq, |
| 151 | children: $children |
| 152 | ); |
| 153 | } |
| 154 | |
| 155 | usort($result, fn (MailFolderDto $a, MailFolderDto $b): int => $this->compareFolderOrder( |
| 156 | $a, |
| 157 | $b, |
| 158 | $orderConfig |
| 159 | )); |
| 160 | |
| 161 | return $result; |
| 162 | } |
| 163 | |
| 164 | /** |
| 165 | * Compares two folder DTOs for sorting. |
| 166 | * |
| 167 | * @param MailFolderDto $a First folder. |
| 168 | * @param MailFolderDto $b Second folder. |
| 169 | * @param array<string>|null $orderConfig Custom order list. |
| 170 | * @return int Comparison result. |
| 171 | */ |
| 172 | public function compareFolderOrder(MailFolderDto $a, MailFolderDto $b, ?array $orderConfig): int |
| 173 | { |
| 174 | if ($orderConfig !== null && $orderConfig !== []) { |
| 175 | $configDiff = $this->compareConfigOrder($a, $b, $orderConfig); |
| 176 | if ($configDiff !== null) { |
| 177 | return $configDiff; |
| 178 | } |
| 179 | } |
| 180 | |
| 181 | $priorityMap = [ |
| 182 | 'inbox' => 1, |
| 183 | 'sent' => 2, |
| 184 | 'drafts' => 3, |
| 185 | 'archive' => 4, |
| 186 | 'spam' => 5, |
| 187 | 'trash' => 6, |
| 188 | ]; |
| 189 | |
| 190 | $prioA = $a->isInbox() ? 1 : ($priorityMap[$a->specialUse ?? ''] ?? 100); |
| 191 | $prioB = $b->isInbox() ? 1 : ($priorityMap[$b->specialUse ?? ''] ?? 100); |
| 192 | |
| 193 | if ($prioA !== $prioB) { |
| 194 | return $prioA <=> $prioB; |
| 195 | } |
| 196 | |
| 197 | return strcasecmp($a->name, $b->name); |
| 198 | } |
| 199 | |
| 200 | /** |
| 201 | * Compares folder positions within explicit configuration array. |
| 202 | * |
| 203 | * @param MailFolderDto $a First folder. |
| 204 | * @param MailFolderDto $b Second folder. |
| 205 | * @param array<string> $orderConfig Configured path order. |
| 206 | * @return int|null Comparison result or null if neither configured. |
| 207 | */ |
| 208 | private function compareConfigOrder(MailFolderDto $a, MailFolderDto $b, array $orderConfig): ?int |
| 209 | { |
| 210 | $posA = array_search($a->path, $orderConfig, true); |
| 211 | $posB = array_search($b->path, $orderConfig, true); |
| 212 | if ($posA !== false && $posB !== false) { |
| 213 | return $posA <=> $posB; |
| 214 | } |
| 215 | if ($posA !== false) { |
| 216 | return -1; |
| 217 | } |
| 218 | |
| 219 | return $posB !== false ? 1 : null; |
| 220 | } |
| 221 | |
| 222 | /** |
| 223 | * Recursively extracts flat list of folder DTOs. |
| 224 | * |
| 225 | * @param array<MailFolderDto> $folders Hierarchy. |
| 226 | * @return array<MailFolderDto> Flattened folders. |
| 227 | */ |
| 228 | public function flattenFolderPaths(array $folders): array |
| 229 | { |
| 230 | $result = []; |
| 231 | foreach ($folders as $f) { |
| 232 | $result[] = $f; |
| 233 | if ($f->hasChildren()) { |
| 234 | $result = array_merge($result, $this->flattenFolderPaths($f->children)); |
| 235 | } |
| 236 | } |
| 237 | |
| 238 | return $result; |
| 239 | } |
| 240 | } |