initial commit

2019-03-30 22:43:34 -04:00
commit c4a666e3b6
78 changed files with 5332 additions and 0 deletions
--- a/search/index.php
+++ b/search/index.php
@@ -0,0 +1,125 @@
+<?php
+  require $_SERVER['DOCUMENT_ROOT']."/globalFuncs.php";
+  conn();
+?>
+<!DOCTYPE html>
+<html>
+    <?php
+      $css = "search";
+      require $_SERVER['DOCUMENT_ROOT']."/res/head";
+    ?>
+  <body>
+    <?php 
+      include $_SERVER['DOCUMENT_ROOT']."/res/top";
+    ?>
+    <div id=results>
+      <?php
+      //Setting number of results per page
+      $GLOBALS["limit"] = 20;
+      $GLOBALS["page"] = is_numeric($_GET["page"])&&$_GET["page"]>0?$_GET["page"]:1;
+      $GLOBALS["check"] = $limit * ($page - 1);
+      
+      function search($statement, $searchByClass){
+        $limit = $GLOBALS["limit"] + 1;
+        $page = $GLOBALS["page"];
+        $start = ($limit - 1) * ($page - 1);
+        //$limit is set one higher to check if there will be a next page, but is subtracted in the $start math because the math relies on the limit.
+        
+        if($searchByClass == false){
+          $stmt = $GLOBALS['conn']->prepare("SELECT * FROM forums WHERE (title LIKE CONCAT('%', :search, '%')) OR (content LIKE CONCAT('%', :search, '%')) ORDER BY date DESC LIMIT $start,$limit");
+        }else{
+          $stmt = $GLOBALS['conn']->prepare("SELECT * FROM forums WHERE (title LIKE CONCAT('%', :search, '%') AND section = :section) OR (content LIKE CONCAT('%', :search, '%') AND section = :section) ORDER BY date DESC LIMIT $start,$limit");
+          $stmt->bindParam(":section", $searchByClass);
+        }
+        $stmt->bindParam(":search", $statement);
+        $stmt->execute();
+        return $stmt->fetchAll();
+      }
+      
+      function searchClassOnly($searchByClass){
+        $limit = $GLOBALS["limit"] + 1;
+        $page = $GLOBALS["page"];
+        $start = ($limit - 1) * ($page - 1);
+        //The above was just copied from function search()
+        //If the user looks up something like "chemistry:", there will be no results so might as well give them ALL of the chemistry posts
+        $stmt = $GLOBALS['conn']->prepare("SELECT * FROM forums WHERE section = :section ORDER BY date DESC LIMIT $start,$limit");
+        $stmt->bindParam(":section", $searchByClass);
+        $stmt->execute();
+        return $stmt->fetchAll();
+      }
+      
+        //Setting the array for storing posts' ID, used to make sure results only turn up once. Also initializing the counter for amount of posts
+        $resArray = array();
+        $count = 0;
+        
+        //Getting class specification, returning false if none
+        preg_match_all("#([A-Za-z]+)(?=:)#", strtok($_GET["q"], " "), $matches);
+        $class = strtolower($matches[0][0]);
+        $classes = file_get_contents($_SERVER['DOCUMENT_ROOT']."/res/classes");
+        $classes = array_filter(explode(",", $classes));
+        if(in_array($class, $classes)){
+          $searchByClass = $class;
+        }else{
+          $searchByClass = false;
+        }
+        
+        //Getting more exact results by searching for strict phrase
+        foreach(search($search, $searchByClass) as $post){
+          $resArray[] = $post["post_id"];
+        }
+        
+        //Getting more general results by searching for each word indevidually
+        $noSpaces = preg_replace('/\s+/', ' ', $_GET["q"]." ");
+            //Adding the space to the GET[q] solves the issue where searching nothing in a class (e.g. "history:") didn't turn up results
+        $search = $searchByClass==false?$noSpaces:substr($noSpaces, strpos($noSpaces, ":")+1);
+        $search = explode(" ", strtolower($search));
+        $exclude = explode("\n", file_get_contents("stopwords.txt"));
+        $search = array_diff($search, $exclude);
+        //gets rid of superflous stop words in search
+        foreach(array_filter($search) as $word){
+          foreach(search($word." ", $searchByClass) as $post){
+            $resArray[] = $post["post_id"];
+          }
+          foreach(search(" ".$word, $searchByClass) as $post){
+            $resArray[] = $post["post_id"];
+          }
+        }
+        
+        if(count(array_filter($search)) == 0 && $searchByClass != false){
+            foreach(searchClassOnly($searchByClass) as $post){
+                $resArray[] = $post["post_id"];
+            }
+        }
+        
+        $resArray = array_unique($resArray);
+        
+        foreach($resArray as $post){
+          $count++;
+        }
+        
+        echo "<h2 id=summary>";
+        if($count==1){
+          echo "There was 1 result";
+        }else if($count > $GLOBALS["limit"] || $GLOBALS["page"] > 1){
+          echo "There were lots of results";
+        }else{
+          echo "There were $count results";
+        }
+        echo "</h2>";
+        
+        foreach($resArray as $post){
+          makePost(getPostInfo($post));
+        }
+        
+        $resArray = array_slice($resArray, 0, $GLOBALS["limit"]);
+        
+        $page = $GLOBALS["page"];
+        $query = urlencode($_GET["q"]);
+        echo "<div id=pages>";
+        echo $page!=1?"<div id=prevPage><a href=/search/?q=$query&page=".($page-1).">&larr;</a></div>":"<div></div>";
+        echo $count>$GLOBALS["limit"]?"<div id=nextPage><a href=/search/?q=$query&page=".($page+1).">&rarr;</a></div>":"<div></div>";
+        echo "</div>";
+      ?>
+    </div>
+  </body>
+</html>