cx/lib/posts.php

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