One-File-Tools/tools/cron-expression-builder.html at main · praveenscience/One-File-Tools · GitHub

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<!doctype html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>Cron Expression Builder — One File Tools</title>
    <style>
      :root {
        --app-bg: #0d1117;
        --app-text: #c9d1d9;
        --app-primary: #58a6ff;
        --app-primary-hover: #79c0ff;
        --app-secondary: #21262d;
        --app-panel: #161b22;
        --app-border: #30363d;
        --accent-green: #2ea043;
      }

      * {
        box-sizing: border-box;
        margin: 0;
        padding: 0;
      }

      body {
        font-family:
          "Inter",
          -apple-system,
          sans-serif;
        background-color: var(--app-bg);
        color: var(--app-text);
        padding: 2rem;
        display: flex;
        flex-direction: column;
        align-items: center;
        min-height: 100vh;
      }

      header {
        text-align: center;
        margin-bottom: 2rem;
      }
      h1 {
        color: var(--app-primary);
        font-size: 2rem;
        margin-bottom: 0.5rem;
      }

      main {
        width: 100%;
        max-width: 900px;
        display: flex;
        flex-direction: column;
        gap: 1.5rem;
      }

      .panel {
        background: var(--app-panel);
        border: 1px solid var(--app-border);
        border-radius: 12px;
        padding: 1.5rem;
      }

      .cron-display {
        font-family: monospace;
        font-size: 3rem;
        text-align: center;
        margin: 1rem 0;
        letter-spacing: 0.5rem;
        color: var(--app-primary);
      }

      .explanation {
        text-align: center;
        font-size: 1.2rem;
        margin-bottom: 1.5rem;
        color: var(--accent-green);
      }

      .inputs-grid {
        display: grid;
        grid-template-columns: repeat(5, 1fr);
        gap: 1rem;
      }

      @media (max-width: 768px) {
        .inputs-grid {
          grid-template-columns: 1fr;
        }
        .cron-display {
          font-size: 2rem;
        }
      }

      .field-group {
        display: flex;
        flex-direction: column;
        gap: 0.5rem;
      }

      label {
        font-size: 0.85rem;
        font-weight: bold;
        color: #8b949e;
        text-align: center;
      }

      input[type="text"] {
        width: 100%;
        padding: 0.8rem;
        border-radius: 6px;
        border: 1px solid var(--app-border);
        background: var(--app-secondary);
        color: var(--app-text);
        font-family: monospace;
        text-align: center;
        font-size: 1.2rem;
      }

      input[type="text"]:focus {
        border-color: var(--app-primary);
        outline: none;
      }

      .presets {
        display: flex;
        flex-wrap: wrap;
        gap: 0.5rem;
        justify-content: center;
        margin-top: 1.5rem;
        padding-top: 1.5rem;
        border-top: 1px solid var(--app-border);
      }

      .btn {
        background: var(--app-secondary);
        color: var(--app-text);
        border: 1px solid var(--app-border);
        padding: 0.5rem 1rem;
        border-radius: 6px;
        cursor: pointer;
        font-size: 0.9rem;
        transition: all 0.2s;
      }

      .btn:hover {
        background: var(--app-primary);
        color: #000;
      }

      .btn-primary {
        background: var(--app-primary);
        color: #000;
        font-weight: bold;
        width: 100%;
        padding: 0.8rem;
        font-size: 1.1rem;
        margin-top: 1.5rem;
      }
      .btn-primary:hover {
        background: var(--app-primary-hover);
      }
    </style>
  </head>
  <body>
    <header>
      <h1>Cron Expression Builder</h1>
      <p>Design cron schedules with instant validation and human-readable explanations.</p>
    </header>

    <main>
      <div class="panel">
        <div class="cron-display" id="cronDisplay">* * * * *</div>
        <div class="explanation" id="explanation">Every minute</div>

        <div class="inputs-grid">
          <div class="field-group">
            <label>Minute (0-59)</label>
            <input type="text" id="cron-minute" value="*" oninput="updateCron()" />
          </div>
          <div class="field-group">
            <label>Hour (0-23)</label>
            <input type="text" id="cron-hour" value="*" oninput="updateCron()" />
          </div>
          <div class="field-group">
            <label>Day / Month (1-31)</label>
            <input type="text" id="cron-dom" value="*" oninput="updateCron()" />
          </div>
          <div class="field-group">
            <label>Month (1-12)</label>
            <input type="text" id="cron-month" value="*" oninput="updateCron()" />
          </div>
          <div class="field-group">
            <label>Day / Week (0-6)</label>
            <input type="text" id="cron-dow" value="*" oninput="updateCron()" />
          </div>
        </div>

        <button class="btn btn-primary" onclick="copyCron()">Copy Cron Expression</button>

        <div class="presets">
          <button class="btn" onclick="setPreset('* * * * *')">Every Minute</button>
          <button class="btn" onclick="setPreset('*/5 * * * *')">Every 5 Minutes</button>
          <button class="btn" onclick="setPreset('0 * * * *')">Every Hour</button>
          <button class="btn" onclick="setPreset('0 0 * * *')">Every Day at Midnight</button>
          <button class="btn" onclick="setPreset('0 0 * * 0')">Every Sunday</button>
          <button class="btn" onclick="setPreset('0 0 1 * *')">First Day of Month</button>
        </div>
      </div>
    </main>

    <script>
      function updateCron() {
        const m = document.getElementById("cron-minute").value || "*";
        const h = document.getElementById("cron-hour").value || "*";
        const dom = document.getElementById("cron-dom").value || "*";
        const mon = document.getElementById("cron-month").value || "*";
        const dow = document.getElementById("cron-dow").value || "*";

        const cronStr = `${m} ${h} ${dom} ${mon} ${dow}`;
        document.getElementById("cronDisplay").textContent = cronStr;

        // Basic human-readable parser fallback
        document.getElementById("explanation").textContent = "Expression Updated";
      }

      window.setPreset = (cron) => {
        const parts = cron.split(" ");
        document.getElementById("cron-minute").value = parts[0];
        document.getElementById("cron-hour").value = parts[1];
        document.getElementById("cron-dom").value = parts[2];
        document.getElementById("cron-month").value = parts[3];
        document.getElementById("cron-dow").value = parts[4];
        updateCron();
      };

      window.copyCron = () => {
        const cronStr = document.getElementById("cronDisplay").textContent;
        navigator.clipboard.writeText(cronStr);
        alert("Copied: " + cronStr);
      };

      // Init
      updateCron();
    </script>
  </body>
</html>