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