init

lib/config.php

@@ -0,0 +1,53 @@
+<?php
+
+const MAX_FRACTION = 8;
+const PERCUSSION_REST = "r";
+const PERCUSSION_CLAP = "hc";
+const PERCUSSION_BEAT = "ss";
+const PERCUSSION_BEAT_ACCENT = "sn";
+const OUTPUT_FOLDER = "./tmp/";
+const LILYPOND_FORMAT = '\\version "2.20.0"
+\\header {
+    tagline = ""
+}
+
+main_source = \\drummode {
+    \\numericTimeSignature
+    \\time %1$s
+    \\tempo %2$s
+    %3$s
+}
+main_padded = \\drummode {
+    %4$s | \\main_source | %4$s
+}
+main = \\drummode {
+    \\main_source
+}
+beat = \\drummode {
+    \\numericTimeSignature
+    \\time %1$s
+    \\tempo %2$s
+    %5$s
+}
+\\score {
+    \\new DrumStaff <<
+        \\new DrumVoice { \\voiceOne \\main_padded }
+        \\new DrumVoice { \\voiceTwo \\beat }
+    >>
+    \\midi {
+        \\tempo %2$s
+    }
+}
+\\score {
+    \\new DrumStaff \with {
+        drumStyleTable = #percussion-style
+        \override StaffSymbol.line-count = #1
+    } <<
+        \\new DrumVoice { \\voiceOne \\main }
+    >>
+    \\layout { }
+}
+\\paper {
+}';
+
+?>

lib/helpers.php

@@ -0,0 +1,37 @@
+<?php
+
+function remove_whitespace($target)
+{
+    return str_replace(" ", "", $target);
+}
+
+function render($template, $locale, $param){
+    ob_start();
+    extract($param, EXTR_SKIP);
+    include($template);
+    $ret = ob_get_contents();
+    ob_end_clean();
+    return $ret;
+}
+
+function setup_locale()
+{
+    $locale = "de_DE.UTF-8";
+
+    if (isset($_SESSION["locale"]))
+    {
+        $locale  = $_SESSION["locale"];
+    }
+
+    putenv("LC_ALL=$locale");
+    setlocale(LC_ALL, $locale);
+
+    $domain = "rhythm";
+
+    bindtextdomain($domain, "./locale");
+    bind_textdomain_codeset($domain, 'UTF-8');
+
+    textdomain($domain);
+}
+
+?>

lib/validation.php

@@ -0,0 +1,119 @@
+<?php
+
+// https://stackoverflow.com/a/600306/9123061
+function is_valid_note($x)
+{
+    return ($x & ($x - 1)) == 0;
+}
+
+function is_valid_time($check_time)
+{
+    if(!is_string($check_time))
+    {
+        return false;
+    }
+    $check_time = remove_whitespace($check_time);
+    $check_time_explode = explode("/", $check_time, 2);
+    $check_time_explode[0] = intval($check_time_explode[0]);
+    $check_time_explode[1] = intval($check_time_explode[1]);
+    if(count($check_time_explode) != 2 || $check_time_explode[0] < 1 || $check_time_explode[1] < 1)
+    {
+        return false;
+    }
+    if(!is_valid_note($check_time_explode[1]))
+    {
+        return false;
+    }
+    $ratio = $check_time_explode[0] / $check_time_explode[1];
+    $new_rhythm_length = intval(MAX_FRACTION * $ratio);
+    if(!is_int($new_rhythm_length) || $new_rhythm_length == 0)
+    {
+        return false;
+    }
+    return true;
+}
+
+function is_valid_tempo($check_tempo)
+{
+    if(!is_string($check_tempo))
+    {
+        return false;
+    }
+    $check_tempo = remove_whitespace($check_tempo);
+    $check_tempo_explode = explode("=", $check_tempo, 2);
+    $check_tempo_explode[0] = intval($check_tempo_explode[0]);
+    $check_tempo_explode[1] = intval($check_tempo_explode[1]);
+    if(count($check_tempo_explode) != 2 || $check_tempo_explode[0] < 1 || $check_tempo_explode[1] < 1)
+    {
+        return false;
+    }
+    if(!is_valid_note($check_tempo_explode[0]))
+    {
+        return false;
+    }
+    return true;
+}
+
+function is_valid_bars($check_bars)
+{
+    if(!intval($check_bars))
+    {
+        return false;
+    }
+    $check_bars = intval($check_bars);
+    if($check_bars < 1 || $check_bars > 64)
+    {
+        return false;
+    }
+    return true;
+}
+
+function is_valid_dynamic($check_dynamic)
+{
+    if(!is_string($check_dynamic))
+    {
+        return false;
+    }
+    $allowed_dynamics_regex = "/^(p{1,5}|f{1,5}|m(p|f)|s(p{1,2}|f{1,2})|fp|(s|r)fz)$/";
+    if(!preg_match($allowed_dynamics_regex, $check_dynamic))
+    {
+        return false;
+    }
+    return true;
+}
+
+function validate_get_parameter()
+{
+    if(!(isset($_GET["time"]) && is_valid_time($_GET["time"])))
+    {
+        $_GET["time"] = "4/4";
+    }
+    $_GET["time"] = remove_whitespace($_GET["time"]);
+
+    if(!(isset($_GET["tempo"]) && is_valid_tempo($_GET["tempo"])))
+    {
+        $_GET["tempo"] = "4=90";
+    }
+    $_GET["tempo"] = remove_whitespace($_GET["tempo"]);
+
+    if(!(isset($_GET["bars"]) && is_valid_bars($_GET["bars"])))
+    {
+        $_GET["bars"] = "2";
+    }
+
+    if(!(isset($_GET["dynamic_beat"]) && is_valid_dynamic($_GET["dynamic_beat"])))
+    {
+        $_GET["dynamic_beat"] = "pp";
+    }
+    if(!(isset($_GET["dynamic_rhythm"]) && is_valid_dynamic($_GET["dynamic_rhythm"])))
+    {
+        $_GET["dynamic_rhythm"] = "ff";
+    }
+
+    if(!(isset($_GET["id"]) && is_string($_GET["id"]) && strlen($_GET["id"]) > 1))
+    {
+        $_GET["id"] = md5(random_bytes(60));
+    }
+}
+
+?>