JSON to PGN parser

2017-03-13 20:56:22 +01:00
parent 29dc9b5f8a
commit 126dc9b599
6 changed files with 280 additions and 5 deletions
--- a/JsonToPgnParser.php
+++ b/JsonToPgnParser.php
@@ -0,0 +1,113 @@
+<?php
+
+/**
+ * Created by IntelliJ IDEA.
+ * User: alfmagne1
+ * Date: 13/03/2017
+ * Time: 19:00
+ */
+class JsonToPgnParser
+{
+
+    private $games;
+
+    public function __construct()
+    {
+        $this->games = array();
+    }
+
+    /**
+     * @param string $jsonString
+     */
+    public function addGame($jsonString)
+    {
+        $this->addGameObject(json_decode($jsonString, true));
+    }
+
+    /**
+     * @param array $json
+     */
+    public function addGameObject($json)
+    {
+        $this->games[] = $json;
+    }
+
+
+    public function asPgn()
+    {
+        $ret = array();
+        foreach ($this->games as $game) {
+            $ret[] = $this->gameToPgn($game);
+
+        }
+        return implode("\n\n", $ret);
+    }
+
+    private function gameToPgn($game)
+    {
+
+        $moves = array();
+        $metadata = array();
+
+        foreach ($game as $key => $value) {
+            switch ($key) {
+                case "moves":
+                    $moves = $this->movesToPgn($value, $this->getStartMove($game));
+                    break;
+                default:
+                    if (is_string($value)) {
+                        $metadata[] = '[' . ucfirst($key) . ' "' . $value . '"]';
+                    }
+            }
+
+
+        }
+        return implode("\n", $metadata) . "\n\n" . $moves;
+
+    }
+
+    private function getStartMove($game)
+    {
+        if (empty($game["fen"])) return 1;
+        $tokens = explode(" ", $game["fen"]);
+        $ret = array_pop($tokens);
+        if ($tokens[1] == "b") $ret += .5;
+        return $ret;
+
+    }
+
+    private function movesToPgn($moves, $startMove)
+    {
+        $ret = array();
+
+        if ($startMove != floor($startMove)) {
+            $ret[] = floor($startMove) . "...";
+        }
+
+        foreach ($moves as $move) {
+            if(!empty($move["m"])){
+                if ($startMove == floor($startMove)) {
+                    $ret[] = $startMove . ".";
+                }
+                $ret[] = str_replace("..", "", $move["m"]);
+            }
+            if (!empty($move["comment"])) {
+                $ret[] = '{' . $move["comment"] . "}";
+            }
+
+            if(!empty($move["variations"])){
+                foreach($move["variations"] as $variation){
+                    if(!empty($variation)){
+                        $ret[] = "(" . $this->movesToPgn($variation, $startMove);
+                    }
+                }
+            }
+            if(!empty($move["m"])) {
+                $startMove += .5;
+            }
+        }
+
+        return implode(" ", $ret);
+
+    }
+}