google-sheets-envelope-maker/Code.gs at main · mkusold/google-sheets-envelope-maker · GitHub

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/**
 * Creates the custom menu.
 */
function onOpen() {
  SpreadsheetApp.getUi()
    .createMenu('✉️ Envelope Maker')
    .addItem('Generate Envelopes', 'showSheetPicker')
    .addToUi();
}

/**
 * Progress helpers
 */
function setProgress_(current, total) {
  PropertiesService.getUserProperties().setProperty(
    "MERGE_PROGRESS",
    JSON.stringify({ current, total })
  );
}

function pollProgress() {
  const val = PropertiesService.getUserProperties().getProperty("MERGE_PROGRESS");
  return val ? JSON.parse(val) : { current: 0, total: 0 };
}

function resetCancelFlag_() {
  PropertiesService.getUserProperties().deleteProperty("CANCEL_MERGE");
}

function setCancelFlag_() {
  PropertiesService.getUserProperties().setProperty("CANCEL_MERGE", "true");
}

/**
 * Picker Dialog: Sheet + Template + Progress
 */
function showSheetPicker() {
  const ss = SpreadsheetApp.getActiveSpreadsheet();
  const sheets = ss.getSheets();
  const sheetOptions = sheets.map(s => `<option value="${s.getName()}">${s.getName()}</option>`).join('');

  // Get parent folder of spreadsheet
  const ssFile = DriveApp.getFileById(ss.getId());
  const folders = ssFile.getParents();
  const parentFolder = folders.hasNext() ? folders.next() : DriveApp.getRootFolder();

  // Scan entire Drive for likely templates (WORKING VERSION)
  const templateFiles = [];
  const files = DriveApp.searchFiles(
    'mimeType="application/vnd.google-apps.document" and ' +
    '(title contains "template" or title contains "Template" or ' +
    ' title contains "envelope" or title contains "Envelope")'
  );

  while (files.hasNext()) {
    templateFiles.push(files.next());
  }

  const templateOptions = templateFiles.map(f => `<option value="${f.getId()}">${f.getName()}</option>`).join('');

  const oauthToken = ScriptApp.getOAuthToken(); // Pass OAuth token to HTML

  const htmlContent = `
  <html>
  <head>
    <script src="https://apis.google.com/js/api.js"></script>
    <script src="https://accounts.google.com/gsi/client"></script>
    <script src="https://apis.google.com/js/api.js"></script>
    <script src="https://www.gstatic.com/picker/1/picker.js"></script>
  </head>
  <body style="font-family: 'Roboto', Arial, sans-serif; padding:20px; color:#333;">
    <div id="setup">
      <label style="font-weight:500;">1. Select Sheet With Addresses</label>
      <p style="font-size:12px; color:#5f6368;margin-top:6px;">
        Column headers in the sheet should exactly match the placeholder names in your template document.
      </p>
      <select id="sheetSelect" style="width:100%; padding:8px; margin:8px 0 14px; border:1px solid #dadce0; border-radius:4px;">
        ${sheetOptions}
      </select>

      <label style="font-weight:500;">2. Select Template Doc</label>
      <p style="font-size:12px; color:#5f6368;margin-top:6px;">
        The template should have placeholders like *|Column Name|*.
      </p>

      <!-- Inline drop-down + picker button -->
      <div style="display:flex; align-items:center; gap:6px; margin-bottom:20px;">
        <select id="templateSelect" style="flex:1; padding:8px; border:1px solid #dadce0; border-radius:4px;">
          <option value="">-- choose a template --</option>
          ${templateOptions}
        </select>
      </div>

      <button id="mainBtn" onclick="runMerge(false)" style="background:#1a73e8;color:#fff;border:none;padding:12px;border-radius:4px;cursor:pointer;width:100%;font-weight:500;margin-bottom:8px;">Generate All</button>
      <button id="testBtn" onclick="runMerge(true)" style="background:#fff;color:#1a73e8;border:1px solid #dadce0;padding:10px;border-radius:4px;cursor:pointer;width:100%;">Test (First Row)</button>

      <div id="progressWrap" style="margin-top:16px; display:none;">
        <div style="height:6px; background:#e8f0fe; border-radius:3px;">
          <div id="bar" style="height:6px; width:0%; background:#1a73e8; border-radius:3px;"></div>
        </div>
        <div style="display:flex;justify-content: center;gap: 10px;align-items: baseline;">
          <p id="progressText" style="font-size:12px; color:#5f6368;text-align:center;margin-top:6px;"></p>
          <button id="cancelBtn" onclick="cancelMerge()" style="display:none;font-size:10px;background:#f44336;color:#fff;border:none;padding:4px 6px;border-radius:3px;cursor:pointer;margin-top:8px;">Cancel</button>
        </div>
      </div>
    </div>

    <script>
      let selectedTemplateId = null;
      const oauthToken = '${oauthToken}';

      document.getElementById('browseBtn').addEventListener('click', () => {
        const view = new google.picker.DocsView(google.picker.ViewId.DOCS)
                      .setIncludeFolders(true);
        const picker = new google.picker.PickerBuilder()
          .setAppId('${ScriptApp.getScriptId()}')
          .setOAuthToken(oauthToken)
          .addView(view)
          .setCallback(pickCallback)
          .build();
        picker.setVisible(true);
      });

      function pickCallback(data) {
        if (data.action === google.picker.Action.PICKED) {
          const doc = data.docs[0];
          selectedTemplateId = doc.id;

          const sel = document.getElementById('templateSelect');
          let found = false;
          for (let i = 0; i < sel.options.length; i++) {
            if (sel.options[i].value === doc.id) {
              sel.selectedIndex = i;
              found = true;
              break;
            }
          }
          if (!found) {
            const opt = document.createElement('option');
            opt.value = doc.id;
            opt.text = doc.name;
            opt.selected = true;
            sel.add(opt);
          }
        }
      }

      function runMerge(isTest) {
        const sheetName = document.getElementById('sheetSelect').value;
        const templateSelect = document.getElementById('templateSelect');
        const templateId = templateSelect.value || selectedTemplateId;
        if (!templateId) { alert('Please select a template'); return; }

        document.getElementById('mainBtn').disabled = true;
        document.getElementById('testBtn').disabled = true;
        document.getElementById('progressWrap').style.display = 'block';
        document.getElementById('cancelBtn').style.display = 'inline-block';
        document.getElementById('progressText').innerText = isTest ? 'Preparing test envelope…' : 'Initializing merge…';

        startPolling();
        google.script.run
          .withFailureHandler(err => {
            alert(err.message);
            document.getElementById('mainBtn').disabled = false;
            document.getElementById('testBtn').disabled = false;
            document.getElementById('cancelBtn').style.display = 'none';
          })
          .withSuccessHandler(() => google.script.host.close())
          .startSimpleMerge(sheetName, templateId, isTest);
      }

      function cancelMerge() {
        google.script.run.setCancelFlag_();
        document.getElementById('progressText').innerText = 'Cancelling…';
        document.getElementById('cancelBtn').disabled = true;
      }

      function startPolling() {
        const poller = setInterval(() => {
          google.script.run.withSuccessHandler(p => {
            if (!p.total) return;
            const pct = Math.round((p.current / p.total) * 100);
            document.getElementById('bar').style.width = pct + '%';
            document.getElementById('progressText').innerText = 'Processed ' + p.current + ' of ' + p.total;
            if (p.current >= p.total) clearInterval(poller);
          }).pollProgress();
        }, 400);
      }
    </script>
  </body>
  </html>
  `;

  SpreadsheetApp.getUi().showModalDialog(
    HtmlService.createHtmlOutput(htmlContent).setWidth(520).setHeight(500),
    '✉️ Envelope Maker'
  );
}

// Server-side: get parent folder of spreadsheet
function getSpreadsheetFolderId() {
  const ssFile = DriveApp.getFileById(SpreadsheetApp.getActiveSpreadsheet().getId());
  const folders = ssFile.getParents();
  return folders.hasNext() ? folders.next().getId() : DriveApp.getRootFolder().getId();
}

/**
 * Extract all *|Tag|* fields from template
 */
function extractTemplateTags_(body) {
  const regex = /\*\|([^|]+)\|\*/g;
  const tags = new Set();
  let match;
  while ((match = regex.exec(body.getText())) !== null) {
    tags.add(match[1].trim());
  }
  return [...tags];
}

/**
 * Main merge logic with progress and cancellation support
 */
function startSimpleMerge(sheetName, templateId, isTest) {
  resetCancelFlag_();

  const ss = SpreadsheetApp.getActiveSpreadsheet();
  const sheet = ss.getSheetByName(sheetName);
  const values = sheet.getDataRange().getValues();
  const headers = values.shift();

  const limit = isTest ? 1 : values.length;
  setProgress_(0, limit);

  const outFile = DriveApp.getFileById(templateId).makeCopy((isTest ? "TEST_" : "") + "Envelopes_" + sheetName);
  const doc = DocumentApp.openById(outFile.getId());
  const body = doc.getBody();

  const templateDoc = DocumentApp.openById(templateId);
  const templateBody = templateDoc.getBody();
  const templateTags = extractTemplateTags_(templateBody);

  for (let i = 0; i < limit; i++) {
    if (PropertiesService.getUserProperties().getProperty("CANCEL_MERGE") === "true") {
      outFile.setTrashed(true);
      setProgress_(i, limit);
      return;
    }

    const row = values[i];
    setProgress_(i + 1, limit);

    if (i > 0) {
      body.appendPageBreak();
      for (let j = 0; j < templateBody.getNumChildren(); j++) {
        const el = templateBody.getChild(j).copy();
        if (el.getType() === DocumentApp.ElementType.PARAGRAPH) body.appendParagraph(el);
        else if (el.getType() === DocumentApp.ElementType.TABLE) body.appendTable(el);
      }
    }

    const replacements = {};
    templateTags.forEach(tag => {
      const idx = headers.indexOf(tag);
      const val = idx === -1 ? "" : row[idx];
      replacements[`\\*\\|${tag}\\|\\*`] = val === null || val === undefined ? "" : String(val);
    });

    body.getParagraphs().forEach(p => {
      let text = p.getText();
      let hadTag = false;
      let allEmpty = true;

      for (const key in replacements) {
        const re = new RegExp(key);
        if (re.test(text)) {
          hadTag = true;
          const v = replacements[key];
          text = text.replace(re, v);
          if (v.trim()) allEmpty = false;
        }
      }

      if (hadTag) {
        if (allEmpty && p.getParent().getNumChildren() > 1) p.removeFromParent();
        else p.setText(text);
      }
    });
  }

  doc.saveAndClose();
  PropertiesService.getUserProperties().deleteProperty("MERGE_PROGRESS");
  resetCancelFlag_();
}