cx/lib/posts.php

   1 <?php
   2
   3 cx_require('lib', 'db.php');
   4 cx_require('lib', 'setup.php');
   5 cx_require('lib', 'markdown.php');
   6
   7 class PostMetadata {
   8         public $hero_image;
   9         public $hero_image_alt;
  10
  11         public function __construct($dict) {
  12                 $this->hero_image = isset($dict['post_hero_image']) ? $dict['post_hero_image'] : null;
  13                 $this->hero_image_alt = isset($dict['post_hero_image_alt']) ? $dict['post_hero_image_alt'] : null;
  14         }
  15 }
  16
  17 class Post {
  18         public $id;
  19         public $title;
  20         public $slug;
  21         public $date;
  22         public $is_page;
  23         public $is_draft;
  24         public $data;
  25         public $html_content;
  26         public $html_excerpt;
  27
  28         public function __construct($dict) {
  29                 $this->id = $dict['post_id']; // FIXME, hide when not used?
  30                 $this->title = $dict['post_title'];
  31                 $this->slug = $dict['post_slug'];
  32                 $this->date = $dict['post_date'];
  33                 $this->is_page = $dict['post_is_page'];
  34                 $this->is_draft = $dict['post_is_draft'];
  35                 $this->data = $dict['post_data'];
  36                 $this->html_content = cx_markdown_generate_html($this->data);
  37                 $this->html_excerpt = null;
  38
  39                 // Read more...
  40                 $segments = explode('---', $this->data, 2);
  41                 if (count($segments) > 1) {
  42                         $this->html_excerpt = cx_markdown_generate_html($segments[0]);
  43                 }
  44         }
  45
  46         public function get_metadata() {
  47                 $data = [];
  48
  49                 $doc = new DOMDocument();
  50                 $doc->loadHTML($this->html_content);
  51
  52                 $image_tag = $doc->getElementsByTagName('img')[0];
  53
  54                 if ($image_tag != null) {
  55                         $data['post_hero_image'] = $image_tag->getAttribute('src');
  56                         $data['post_hero_image_alt'] = htmlspecialchars($image_tag->getAttribute('alt'));
  57                 }
  58
  59                 return new PostMetadata($data);
  60         }
  61 }
  62
  63 function cx_post_make_slug($title) {
  64         $alnum_title = preg_replace('/[^A-Za-z0-9 ]?/', '', $title);
  65
  66         $slug_components = explode(' ', $alnum_title, 10);
  67         $slug_components = array_filter($slug_components);
  68         $slug_components = array_values($slug_components); // re-index
  69
  70         $slug = join('-', $slug_components);
  71         $slug = strtolower($slug);
  72
  73         return $slug;
  74 }
  75
  76 function cx_posts_add_post($site_id, $title, $slug, $date, $page, $draft, $data) {
  77         $creation_time = $update_time = time();
  78
  79         if ($slug == null) {
  80                 $slug = cx_post_make_slug($title);
  81         }
  82
  83         if ($date == null) {
  84                 $date = $update_time;
  85         }
  86
  87         $sql = 'INSERT INTO posts (
  88                         post_site_id,
  89                         post_creation_time,
  90                         post_update_time,
  91                         post_slug,
  92                         post_date,
  93                         post_is_page,
  94                         post_is_draft,
  95                         post_title,
  96                         post_data,
  97                         post_data_version)
  98                 VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?, ?);';
  99         cx_db_exec($sql, $site_id, $creation_time, $update_time, $slug, $date, $page, $draft, $title, $data, 1);
 100 }
 101
 102 function cx_posts_update_post($post_id, $title, $slug, $date, $page, $draft, $data) {
 103         $update_time = time();
 104
 105         if ($slug == null) {
 106                 $slug = cx_post_make_slug($title);
 107         }
 108
 109         if ($date == null) {
 110                 $date = $update_time;
 111         }
 112
 113         $sql = 'UPDATE posts
 114                 SET post_update_time = ?,
 115                 post_slug = ?,
 116                 post_date = ?,
 117                 post_is_page = ?,
 118                 post_is_draft = ?,
 119                 post_title = ?,
 120                 post_data = ?
 121                 WHERE post_id == ?;';
 122                 //LIMIT 1;';
 123         cx_db_exec($sql, $update_time, $slug, $date, $page, $draft, $title, $data, $post_id);
 124 }
 125
 126 function cx_posts_delete_post($post_id) {
 127         $sql = 'DELETE FROM posts
 128                 WHERE post_id == ?;';
 129                 //LIMIT 1;';
 130         cx_db_exec($sql, $post_id);
 131 }
 132
 133 function cx_posts_get(int $limit = 0, int $offset = 0, bool $include_drafts = false) {
 134         $sql = 'SELECT
 135                 post_id,
 136                 post_slug,
 137                 post_date,
 138                 post_is_draft,
 139                 post_title,
 140                 post_data
 141                 FROM posts
 142                 WHERE post_is_page == FALSE';
 143
 144         if ($include_drafts == false) {
 145                 $sql .= ' AND post_is_draft == FALSE';
 146         }
 147
 148         $sql .= ' ORDER BY post_date DESC';
 149
 150         if ($limit > 0) {
 151                 $sql .= ' LIMIT ' . $limit;
 152         }
 153
 154         if ($offset > 0) {
 155                 $sql .= ' OFFSET ' . $offset;
 156         }
 157
 158         $sql .= ';';
 159
 160         foreach (cx_db_query($sql) as $post) {
 161                 $p = new Post($post);
 162                 yield $p;
 163         }
 164 }
 165
 166 function cx_posts_count(bool $include_drafts = false) {
 167         $sql = 'SELECT
 168                 COUNT(post_id) AS _count
 169                 FROM posts
 170                 WHERE post_is_page == FALSE';
 171
 172         if ($include_drafts == false) {
 173                 $sql .= ' AND post_is_draft == FALSE';
 174         }
 175
 176         $sql .= ';';
 177
 178
 179         foreach (cx_db_query($sql) as $count_details) {
 180                 return $count_details['_count'];
 181         }
 182
 183         return 0;
 184 }
 185
 186 function cx_posts_find_post($post_id) {
 187         $sql = 'SELECT
 188                 post_id,
 189                 post_slug,
 190                 post_date,
 191                 post_is_draft,
 192                 post_title,
 193                 post_data
 194                 FROM posts
 195                 WHERE post_id == ?
 196                 LIMIT 1;';
 197
 198         foreach (cx_db_query($sql, $post_id) as $post) {
 199                 $p = new Post($post);
 200                 return $p;
 201         }
 202
 203         return null;
 204 }
 205
 206 function cx_posts_find_article_id($post_slug) {
 207         $sql = 'SELECT
 208                 post_id
 209                 FROM posts
 210                 WHERE post_slug == ?
 211                 AND post_is_page == FALSE
 212                 AND post_is_draft == FALSE
 213                 LIMIT 1;';
 214
 215         foreach (cx_db_query($sql, $post_slug) as $post) {
 216                 return $post['post_id'];
 217         }
 218
 219         return null;
 220 }
 221
 222 function cx_posts_find_page_id($post_slug) {
 223         $sql = 'SELECT
 224                 post_id
 225                 FROM posts
 226                 WHERE post_slug == ?
 227                 AND post_is_page == TRUE
 228                 AND post_is_draft == FALSE
 229                 LIMIT 1;';
 230
 231         foreach (cx_db_query($sql, $post_slug) as $post) {
 232                 return $post['post_id'];
 233         }
 234
 235         return null;
 236 }
 237
 238 function cx_pages_get() {
 239         $sql = 'SELECT
 240                 post_id,
 241                 post_slug,
 242                 post_date,
 243                 post_is_draft,
 244                 post_title,
 245                 post_data
 246                 FROM posts
 247                 WHERE post_is_page == TRUE
 248                 AND post_is_draft == FALSE
 249                 ORDER BY post_creation_time DESC;';
 250
 251         foreach (cx_db_query($sql) as $post) {
 252                 $p = new Post($post);
 253                 yield $p;
 254         }
 255 }
 256
 257 cx_setup_register(1, function() {
 258         cx_db_exec('CREATE TABLE posts (
 259                         post_id INTEGER PRIMARY KEY,
 260                         post_site_id INTEGER,
 261                         post_creation_time INTEGER,
 262                         post_update_time INTEGER,
 263                         post_slug STRING,
 264                         post_date INTEGER,
 265                         post_is_page BOOLEAN,
 266                         post_is_draft BOOLEAN,
 267                         post_title STRING,
 268                         post_data BLOB,
 269                         post_data_version INTEGER,
 270
 271                         FOREIGN KEY(post_site_id) REFERENCES sites(site_id)
 272                 );');
 273 });