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, $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, false, $draft, $title, $data, 1);
  98 }
  99
 100 function cx_posts_update_post($post_id, $title, $slug, $date, $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         $sql = 'UPDATE posts
 112                 SET post_update_time = ?,
 113                 post_slug = ?,
 114                 post_date = ?,
 115                 post_is_draft = ?,
 116                 post_title = ?,
 117                 post_data = ?
 118                 WHERE post_id == ?;';
 119                 //LIMIT 1;';
 120         cx_db_exec($sql, $update_time, $slug, $date, $draft, $title, $data, $post_id);
 121 }
 122
 123 function cx_posts_delete_post($post_id) {
 124         $sql = 'DELETE FROM posts
 125                 WHERE post_id == ?;';
 126                 //LIMIT 1;';
 127         cx_db_exec($sql, $post_id);
 128 }
 129
 130 function cx_posts_get(int $limit = 0, int $offset = 0, bool $include_drafts = false) {
 131         $sql = 'SELECT
 132                 post_id,
 133                 post_slug,
 134                 post_date,
 135                 post_is_draft,
 136                 post_title,
 137                 post_data
 138                 FROM posts
 139                 WHERE post_is_page == FALSE';
 140
 141         if ($include_drafts == false) {
 142                 $sql .= ' AND post_is_draft == FALSE';
 143         }
 144
 145         $sql .= ' ORDER BY post_date DESC';
 146
 147         if ($limit > 0) {
 148                 $sql .= ' LIMIT ' . $limit;
 149         }
 150
 151         if ($offset > 0) {
 152                 $sql .= ' OFFSET ' . $offset;
 153         }
 154
 155         $sql .= ';';
 156
 157         foreach (cx_db_query($sql) as $post) {
 158                 $p = new Post($post);
 159                 yield $p;
 160         }
 161 }
 162
 163 function cx_posts_find_post($post_id) {
 164         $sql = 'SELECT
 165                 post_id,
 166                 post_slug,
 167                 post_date,
 168                 post_is_draft,
 169                 post_title,
 170                 post_data
 171                 FROM posts
 172                 WHERE post_is_page == FALSE
 173                 AND post_id == ?
 174                 LIMIT 1;';
 175
 176         foreach (cx_db_query($sql, $post_id) as $post) {
 177                 $p = new Post($post);
 178                 return $p;
 179         }
 180
 181         return null;
 182 }
 183
 184 function cx_posts_find_post_id($post_slug) {
 185         $sql = 'SELECT
 186                 post_id
 187                 FROM posts
 188                 WHERE post_slug == ?
 189                 LIMIT 1;';
 190
 191         foreach (cx_db_query($sql, $post_slug) as $post) {
 192                 return $post['post_id'];
 193         }
 194
 195         return null;
 196 }
 197
 198 function cx_pages_get() {
 199         $sql = 'SELECT
 200                 post_id,
 201                 post_slug,
 202                 post_date,
 203                 post_is_draft,
 204                 post_title,
 205                 post_data
 206                 FROM posts
 207                 WHERE post_is_page == TRUE
 208                 AND post_is_draft == FALSE
 209                 ORDER BY post_creation_time DESC;';
 210
 211         foreach (cx_db_query($sql) as $post) {
 212                 $p = new Post($post);
 213                 yield $p;
 214         }
 215 }
 216
 217 cx_setup_register(1, function() {
 218         cx_db_exec('CREATE TABLE posts (
 219                         post_id INTEGER PRIMARY KEY,
 220                         post_site_id INTEGER,
 221                         post_creation_time INTEGER,
 222                         post_update_time INTEGER,
 223                         post_slug STRING,
 224                         post_date INTEGER,
 225                         post_is_page BOOLEAN,
 226                         post_is_draft BOOLEAN,
 227                         post_title STRING,
 228                         post_data BLOB,
 229                         post_data_version INTEGER,
 230
 231                         FOREIGN KEY(post_site_id) REFERENCES sites(site_id)
 232                 );');
 233 });