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| 1 | +<?php |
| 2 | + |
| 3 | +class SocialNetwork { |
| 4 | + private $users = []; |
| 5 | + private $posts = []; |
| 6 | + private $follows = []; |
| 7 | + private $likes = []; |
| 8 | + |
| 9 | + public function registerUser($userId, $username) { |
| 10 | + if (isset($this->users[$userId])) { |
| 11 | + echo "El usuario con ID $userId ya existe.\n"; |
| 12 | + } else { |
| 13 | + $this->users[$userId] = $username; |
| 14 | + echo "Usuario $username registrado con éxito.\n"; |
| 15 | + } |
| 16 | + } |
| 17 | + |
| 18 | + public function followUser($followerId, $followeeId) { |
| 19 | + if (!isset($this->users[$followerId]) || !isset($this->users[$followeeId])) { |
| 20 | + echo "Uno de los usuarios no existe.\n"; |
| 21 | + return; |
| 22 | + } |
| 23 | + $this->follows[$followerId][$followeeId] = true; |
| 24 | + echo "Usuario $followerId ahora sigue a $followeeId.\n"; |
| 25 | + } |
| 26 | + |
| 27 | + public function unfollowUser($followerId, $followeeId) { |
| 28 | + if (isset($this->follows[$followerId][$followeeId])) { |
| 29 | + unset($this->follows[$followerId][$followeeId]); |
| 30 | + echo "Usuario $followerId ha dejado de seguir a $followeeId.\n"; |
| 31 | + } else { |
| 32 | + echo "El usuario $followerId no sigue a $followeeId.\n"; |
| 33 | + } |
| 34 | + } |
| 35 | + |
| 36 | + public function createPost($userId, $postId, $text) { |
| 37 | + if (!isset($this->users[$userId])) { |
| 38 | + echo "El usuario no existe.\n"; |
| 39 | + return; |
| 40 | + } |
| 41 | + if (strlen($text) > 200) { |
| 42 | + echo "El texto del post excede los 200 caracteres.\n"; |
| 43 | + return; |
| 44 | + } |
| 45 | + $this->posts[$postId] = [ |
| 46 | + 'userId' => $userId, |
| 47 | + 'text' => $text, |
| 48 | + 'createdAt' => date('Y-m-d H:i:s'), |
| 49 | + 'likes' => 0 |
| 50 | + ]; |
| 51 | + echo "Post creado con éxito.\n"; |
| 52 | + } |
| 53 | + |
| 54 | + public function deletePost($postId) { |
| 55 | + if (isset($this->posts[$postId])) { |
| 56 | + unset($this->posts[$postId]); |
| 57 | + echo "Post eliminado con éxito.\n"; |
| 58 | + } else { |
| 59 | + echo "El post no existe.\n"; |
| 60 | + } |
| 61 | + } |
| 62 | + |
| 63 | + public function likePost($userId, $postId) { |
| 64 | + if (!isset($this->users[$userId])) { |
| 65 | + echo "El usuario no existe.\n"; |
| 66 | + return; |
| 67 | + } |
| 68 | + if (!isset($this->posts[$postId])) { |
| 69 | + echo "El post no existe.\n"; |
| 70 | + return; |
| 71 | + } |
| 72 | + $this->likes[$userId][$postId] = true; |
| 73 | + $this->posts[$postId]['likes']++; |
| 74 | + echo "Like añadido al post $postId.\n"; |
| 75 | + } |
| 76 | + |
| 77 | + public function unlikePost($userId, $postId) { |
| 78 | + if (isset($this->likes[$userId][$postId])) { |
| 79 | + unset($this->likes[$userId][$postId]); |
| 80 | + $this->posts[$postId]['likes']--; |
| 81 | + echo "Like eliminado del post $postId.\n"; |
| 82 | + } else { |
| 83 | + echo "El usuario no ha hecho like en el post $postId.\n"; |
| 84 | + } |
| 85 | + } |
| 86 | + |
| 87 | + public function viewUserFeed($userId) { |
| 88 | + if (!isset($this->users[$userId])) { |
| 89 | + echo "El usuario no existe.\n"; |
| 90 | + return; |
| 91 | + } |
| 92 | + $userPosts = array_filter($this->posts, function($post) use ($userId) { |
| 93 | + return $post['userId'] == $userId; |
| 94 | + }); |
| 95 | + usort($userPosts, function($a, $b) { |
| 96 | + return strtotime($b['createdAt']) - strtotime($a['createdAt']); |
| 97 | + }); |
| 98 | + $userPosts = array_slice($userPosts, 0, 10); |
| 99 | + foreach ($userPosts as $post) { |
| 100 | + echo "ID: {$post['userId']}, Usuario: {$this->users[$post['userId']]}, Texto: {$post['text']}, Fecha: {$post['createdAt']}, Likes: {$post['likes']}\n"; |
| 101 | + } |
| 102 | + } |
| 103 | + |
| 104 | + public function viewFollowedFeed($userId) { |
| 105 | + if (!isset($this->users[$userId])) { |
| 106 | + echo "El usuario no existe.\n"; |
| 107 | + return; |
| 108 | + } |
| 109 | + $followedPosts = []; |
| 110 | + if (isset($this->follows[$userId])) { |
| 111 | + foreach ($this->follows[$userId] as $followeeId => $value) { |
| 112 | + foreach ($this->posts as $postId => $post) { |
| 113 | + if ($post['userId'] == $followeeId) { |
| 114 | + $followedPosts[] = $post; |
| 115 | + } |
| 116 | + } |
| 117 | + } |
| 118 | + } |
| 119 | + usort($followedPosts, function($a, $b) { |
| 120 | + return strtotime($b['createdAt']) - strtotime($a['createdAt']); |
| 121 | + }); |
| 122 | + $followedPosts = array_slice($followedPosts, 0, 10); |
| 123 | + foreach ($followedPosts as $post) { |
| 124 | + echo "ID: {$post['userId']}, Usuario: {$this->users[$post['userId']]}, Texto: {$post['text']}, Fecha: {$post['createdAt']}, Likes: {$post['likes']}\n"; |
| 125 | + } |
| 126 | + } |
| 127 | +} |
| 128 | + |
| 129 | +// Menú interactivo |
| 130 | +$network = new SocialNetwork(); |
| 131 | + |
| 132 | +while (true) { |
| 133 | + echo "Seleccione una opción:\n"; |
| 134 | + echo "1. Registrar usuario\n"; |
| 135 | + echo "2. Seguir a un usuario\n"; |
| 136 | + echo "3. Dejar de seguir a un usuario\n"; |
| 137 | + echo "4. Crear post\n"; |
| 138 | + echo "5. Eliminar post\n"; |
| 139 | + echo "6. Hacer like en un post\n"; |
| 140 | + echo "7. Eliminar like de un post\n"; |
| 141 | + echo "8. Ver feed del usuario\n"; |
| 142 | + echo "9. Ver feed de usuarios seguidos\n"; |
| 143 | + echo "0. Salir\n"; |
| 144 | + $option = readline("Opción: "); |
| 145 | + |
| 146 | + switch ($option) { |
| 147 | + case 1: |
| 148 | + $userId = readline("ID de usuario: "); |
| 149 | + $username = readline("Nombre de usuario: "); |
| 150 | + $network->registerUser($userId, $username); |
| 151 | + break; |
| 152 | + case 2: |
| 153 | + $followerId = readline("ID del seguidor: "); |
| 154 | + $followeeId = readline("ID del seguido: "); |
| 155 | + $network->followUser($followerId, $followeeId); |
| 156 | + break; |
| 157 | + case 3: |
| 158 | + $followerId = readline("ID del seguidor: "); |
| 159 | + $followeeId = readline("ID del seguido: "); |
| 160 | + $network->unfollowUser($followerId, $followeeId); |
| 161 | + break; |
| 162 | + case 4: |
| 163 | + $userId = readline("ID de usuario: "); |
| 164 | + $postId = readline("ID del post: "); |
| 165 | + $text = readline("Texto del post: "); |
| 166 | + $network->createPost($userId, $postId, $text); |
| 167 | + break; |
| 168 | + case 5: |
| 169 | + $postId = readline("ID del post: "); |
| 170 | + $network->deletePost($postId); |
| 171 | + break; |
| 172 | + case 6: |
| 173 | + $userId = readline("ID de usuario: "); |
| 174 | + $postId = readline("ID del post: "); |
| 175 | + $network->likePost($userId, $postId); |
| 176 | + break; |
| 177 | + case 7: |
| 178 | + $userId = readline("ID de usuario: "); |
| 179 | + $postId = readline("ID del post: "); |
| 180 | + $network->unlikePost($userId, $postId); |
| 181 | + break; |
| 182 | + case 8: |
| 183 | + $userId = readline("ID de usuario: "); |
| 184 | + $network->viewUserFeed($userId); |
| 185 | + break; |
| 186 | + case 9: |
| 187 | + $userId = readline("ID de usuario: "); |
| 188 | + $network->viewFollowedFeed($userId); |
| 189 | + break; |
| 190 | + case 0: |
| 191 | + exit("¡Hasta luego!\n"); |
| 192 | + default: |
| 193 | + echo "Opción no válida. Intente de nuevo.\n"; |
| 194 | + break; |
| 195 | + } |
| 196 | +} |
| 197 | + |
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