<?php
/******************************************************************************
 * YMS - Yacht Management Software
 * Copyright (C) 2024-2026 Thomas Hooge
 * 
 * SPDX-License-Identifier: WTFPL
 ******************************************************************************

*/

// ========== SVG-FUNCTIONS ===================================================

function create_shapeindex($shapeindexfile) {
    // an existing index file will be overwritten
    global $g_shapedir;
    foreach (glob($g_shapedir.'/*.svg') as $f) {
        $fh = fopen($f, 'r');
        $fname = basename($f);
        // try to read metadata from top of svg file
        $header = fread($fh, 1024);
        if (preg_match('/<title[^>]*>(.*?)<\/title>/is', $header, $match)) {
            $title = trim($match[1]);
        } else {
            $title = $fname;
        }
        $shapeindex[$fname] = $title;
        fclose($fh);
    }
    $json = json_encode($shapeindex, JSON_PRETTY_PRINT | JSON_UNESCAPED_UNICODE);
    file_put_contents($shapeindexfile, $json);
    return $shapeindex;
}

function get_shapeindex() {
    global $g_doc_basepath;
    $shapeindex = [];
    $shapeindexfile = $g_doc_basepath . '/shapeindex.json';
    if (!file_exists($shapeindexfile)) {
        $shapeindex = create_shapeindex($shapeindexfile);
    } else {
        // check if shapeindex needs refresh (older than one day)
        if (time() - filemtime($shapeindexfile) > 86400) {
            $shapeindex = create_shapeindex($shapeindexfile);
        } else {
            // read svg metadata from existing file
            $json = file_get_contents($shapeindexfile);
            $shapeindex = json_decode($json, true);
            if (json_last_error() !== JSON_ERROR_NONE) {
                // some kind of error: just recreate
                $shapeindex = create_shapeindex($shapeindexfile);
            }
        }
    }
    return $shapeindex;
}

function svg_create_box($cx, $cy, $w, $h, $fg, $bg) {
}