From 601841c75461f617d867db51baa784f58515e6d9 Mon Sep 17 00:00:00 2001
From: Robbie Antenesse <dev@alamantus.com>
Date: Thu, 30 May 2019 12:18:59 -0600
Subject: [PATCH] Correctly link public word references

---
 src/php/api/Dictionary.php | 62 +++++++++++++++++++++++++++++++++++++-
 1 file changed, 61 insertions(+), 1 deletion(-)

diff --git a/src/php/api/Dictionary.php b/src/php/api/Dictionary.php
index f3e3f66..924a550 100644
--- a/src/php/api/Dictionary.php
+++ b/src/php/api/Dictionary.php
@@ -165,12 +165,13 @@ VALUES ($new_id, ?, ?, ?, ?)";
       $query = "SELECT words.* FROM words JOIN dictionaries ON id = dictionary WHERE dictionary=? AND word_id=? AND is_public=1";
       $result = $this->db->query($query, array($dictionary, $word))->fetch();
       if ($result) {
+        $details = $this->parseReferences($result['details'], $dictionary);
         return array(
           'name' => $result['name'],
           'pronunciation' => $result['pronunciation'],
           'partOfSpeech' => $result['part_of_speech'],
           'definition' => $result['definition'],
-          'details' => $result['details'],
+          'details' => $details,
           'lastUpdated' => is_null($result['last_updated']) ? intval($result['created_on']) : intval($result['last_updated']),
           'createdOn' => intval($result['created_on']),
           'wordId' => intval($result['word_id']),
@@ -180,6 +181,65 @@ VALUES ($new_id, ?, ?, ?, ?)";
     return false;
   }
 
+  private function parseReferences($details, $dictionary_id) {
+    if (preg_match_all('/\{\{.+?\}\}/', $details, $references) !== false) {
+      $references = array_unique($references[0]);
+      foreach($references as $reference) {
+        $word_to_find = preg_replace('/\{\{|\}\}/', '', $reference);
+        $homonymn = 0;
+      
+        if (strpos($word_to_find, ':') !== false) {
+          $separator = strpos($word_to_find, ':');
+          $homonymn = substr($word_to_find, $separator + 1);
+          $word_to_find = substr($word_to_find, 0, $separator);
+          if ($homonymn && trim($homonymn) && intval(trim($homonymn)) > 0) {
+            $homonymn = intval(trim($homonymn));
+          } else {
+            $homonymn = false;
+          }
+        }
+
+        $target_id = false;
+        $reference_ids = $this->getWordIdsWithName($dictionary_id, $word_to_find);
+
+        if (count($reference_ids) > 0) {
+          if ($homonymn !== false && $homonymn > 0) {
+            if (isset($reference_ids[$homonymn - 1])) {
+              $target_id = $reference_ids[$homonymn - 1];
+            }
+          } else if ($homonymn !== false) {
+            $target_id = $reference_ids[0];
+          }
+
+          if ($target_id !== false) {
+            if ($homonymn < 1) {
+              $homonymn = 1;
+            }
+            $homonymn_sub_html = $homonymn > 0 ? '<sub>' . $homonymn . '</sub>' : '';
+            $site_root = substr($_SERVER['REQUEST_URI'], 0, strpos($_SERVER['REQUEST_URI'], $dictionary_id));
+            $markdown_link = '[' . $word_to_find . $homonymn_sub_html . '](' . $site_root . $dictionary_id . '/' . $target_id . ')';
+            $details = str_replace($reference, $markdown_link, $details);
+          }
+        }
+      }
+    }
+
+    return $details;
+  }
+
+  private function getWordIdsWithName($dictionary, $word_name) {
+    if (is_numeric($dictionary)) {
+      $query = "SELECT word_id FROM words WHERE dictionary=? AND name=?";
+      $results = $this->db->query($query, array($dictionary, $word_name))->fetchAll();
+      if ($results) {
+        return array_map(function ($row) {
+          return intval($row['word_id']);
+        }, $results);
+      }
+    }
+    return array();
+  }
+
   public function getDetails ($user, $dictionary) {
     $query = "SELECT * FROM dictionaries JOIN dictionary_linguistics ON dictionary = id WHERE user=$user AND id=$dictionary";
     $result = $this->db->query($query)->fetch();