Outputs JSON objects for the manly man password generator and the idea generator.

exportjson.js

// Includes functions for exporting active sheet or all sheets as JSON object (also Python object syntax compatible).
// Tweak the makePrettyJSON_ function to customize what kind of JSON to export.
 
var FORMAT_ONELINE   = 'One-line';
var FORMAT_MULTILINE = 'Multi-line';
var FORMAT_PRETTY    = 'Pretty';
 
var LANGUAGE_JS      = 'JavaScript';
var LANGUAGE_PYTHON  = 'Python';
 
var STRUCTURE_COLUMNS = 'Columns';
 
/* Defaults for this particular spreadsheet, change as desired */
var DEFAULT_FORMAT = FORMAT_PRETTY;
var DEFAULT_LANGUAGE = LANGUAGE_JS;
var DEFAULT_STRUCTURE = STRUCTURE_COLUMNS;
 
 
function onOpen() {
  var ss = SpreadsheetApp.getActiveSpreadsheet();
  var menuEntries = [
    {name: "Export JSON for this sheet", functionName: "exportSheet"},
    {name: "Configure export", functionName: "exportOptions"},
  ];
  ss.addMenu("Export JSON", menuEntries);
}
    
    
function exportOptions() {
  var doc = SpreadsheetApp.getActiveSpreadsheet();
  var app = UiApp.createApplication().setTitle('Export JSON');
  
  var grid = app.createGrid(4, 2);
  grid.setWidget(0, 0, makeLabel(app, 'Language:'));
  grid.setWidget(0, 1, makeListBox(app, 'language', [LANGUAGE_JS, LANGUAGE_PYTHON]));
  grid.setWidget(1, 0, makeLabel(app, 'Format:'));
  grid.setWidget(1, 1, makeListBox(app, 'format', [FORMAT_PRETTY, FORMAT_MULTILINE, FORMAT_ONELINE]));
  grid.setWidget(2, 0, makeLabel(app, 'Structure:'));
  grid.setWidget(2, 1, makeListBox(app, 'structure', [STRUCTURE_COLUMNS]));
  grid.setWidget(3, 0, makeButton(app, grid, 'Export Active Sheet', 'exportSheet'));
  app.add(grid);
  
  doc.show(app);
}
 
function makeLabel(app, text, id) {
  var lb = app.createLabel(text);
  if (id) lb.setId(id);
  return lb;
}
 
function makeListBox(app, name, items) {
  var listBox = app.createListBox().setId(name).setName(name);
  listBox.setVisibleItemCount(1);
  
  var cache = CacheService.getPublicCache();
  var selectedValue = cache.get(name);
  Logger.log(selectedValue);
  for (var i = 0; i < items.length; i++) {
    listBox.addItem(items[i]);
    if (items[1] == selectedValue) {
      listBox.setSelectedIndex(i);
    }
  }
  return listBox;
}
 
function makeButton(app, parent, name, callback) {
  var button = app.createButton(name);
  app.add(button);
  var handler = app.createServerClickHandler(callback).addCallbackElement(parent);;
  button.addClickHandler(handler);
  return button;
}
 
function makeTextBox(app, name) { 
  var textArea    = app.createTextArea().setWidth('100%').setHeight('200px').setId(name).setName(name);
  return textArea;
}

function exportSheet(e) {
  var options = getExportOptions(e);
  var ss = SpreadsheetApp.getActiveSpreadsheet();
  var sheet = ss.getActiveSheet();
  var dataRange = sheet.getRange(sheet.getFrozenRows()+1, sheet.getFrozenColumns() + 1, sheet.getMaxRows(), sheet.getMaxColumns());
  var outputData = getColumnsData(sheet, dataRange);
  var json = makeJSON_(outputData, options);
  return displayText_(json);
}
  
function getExportOptions(e) {
  var options = {};
  
  options.language = e && e.parameter.language || DEFAULT_LANGUAGE;
  options.format   = e && e.parameter.format || DEFAULT_FORMAT;
  options.structure = e && e.parameter.structure || DEFAULT_STRUCTURE;
  
  var cache = CacheService.getPublicCache();
  cache.put('language', options.language);
  cache.put('format',   options.format);
  cache.put('structure',   options.structure);
  
  Logger.log(options);
  return options;
}
 
function makeJSON_(object, options) {
  if (options.format == FORMAT_PRETTY) {
    var jsonString = JSON.stringify(object, null, 4);
  } else if (options.format == FORMAT_MULTILINE) {
    var jsonString = Utilities.jsonStringify(object);
    jsonString = jsonString.replace(/},/gi, '},\n');
    jsonString = prettyJSON.replace(/":\[{"/gi, '":\n[{"');
    jsonString = prettyJSON.replace(/}\],/gi, '}],\n');
  } else {
    var jsonString = Utilities.jsonStringify(object);
  }
  if (options.language == LANGUAGE_PYTHON) {
    // add unicode markers
    jsonString = jsonString.replace(/"([a-zA-Z]*)":\s+"/gi, '"$1": u"');
  }
  return jsonString;
}
 
function displayText_(text) {
  var app = UiApp.createApplication().setTitle('Exported JSON');
  app.add(makeTextBox(app, 'json'));
  app.getElementById('json').setText(text);
  var ss = SpreadsheetApp.getActiveSpreadsheet(); 
  ss.show(app);
  return app; 
}

// getColumnsData iterates column by column in the input range and returns an array of objects.
// Each object contains all the data for a given column, indexed by its normalized column name.
// Arguments:
//   - sheet: the sheet object that contains the data to be processed
//   - range: the exact range of cells where the data is stored
//   - rowHeadersColumnIndex: specifies the column number where the row names are stored.
//       This argument is optional and it defaults to the column immediately left of the range;
// Returns an Array of objects.
function getColumnsData(sheet, range, columnHeadersRowIndex) {
  columnHeadersRowIndex = columnHeadersRowIndex || range.getRowIndex() - 1;
  var headersTmp = sheet.getRange(columnHeadersRowIndex, range.getColumn(), 1, range.getNumColumns()).getValues();
  var headers = normalizeHeaders(headersTmp[0]);
  
  Logger.log("Number of columns: " + range.getNumColumns());
  Logger.log("Headers: " + headersTmp);

  return getObjects(range.getValues(), headers);
}


// For every row of data in data, generates an object that contains the data. Names of
// object fields are defined in keys.
// Arguments:
//   - data: JavaScript 2d array
//   - keys: Array of Strings that define the property names for the objects to create
function getObjects(data, keys) {
  var objects = {};
  for (var i = 0; i < data[0].length; ++i) {
    var object = {};
    var hasData = false;
    var array = [];
    for (var j = 0; j < data.length; ++j) {
      var cellData = data[j][i];
      if (isCellEmpty(cellData)) {
        continue;
      }
      array.push(cellData);
      hasData = true;
    }
    if (hasData) {
      objects[keys[i]] = array;
    }
  }
  return objects;
}

// Returns an Array of normalized Strings.
// Arguments:
//   - headers: Array of Strings to normalize
function normalizeHeaders(headers) {
  var keys = [];
  for (var i = 0; i < headers.length; ++i) {
    var key = normalizeHeader(headers[i]);
    if (key.length > 0) {
      keys.push(key);
    }
  }
  return keys;
}

// Normalizes a string, by removing all alphanumeric characters and using mixed case
// to separate words. The output will always start with a lower case letter.
// This function is designed to produce JavaScript object property names.
// Arguments:
//   - header: string to normalize
// Examples:
//   "First Name" -> "firstName"
//   "Market Cap (millions) -> "marketCapMillions
//   "1 number at the beginning is ignored" -> "numberAtTheBeginningIsIgnored"
function normalizeHeader(header) {
  var key = "";
  var upperCase = false;
  for (var i = 0; i < header.length; ++i) {
    var letter = header[i];
    if (letter == " " && key.length > 0) {
      upperCase = true;
      continue;
    }
    if (!isAlnum(letter)) {
      continue;
    }
    if (key.length == 0 && isDigit(letter)) {
      continue; // first character must be a letter
    }
    if (upperCase) {
      upperCase = false;
      key += letter.toUpperCase();
    } else {
      key += letter.toLowerCase();
    }
  }
  return key;
}

// Returns true if the cell where cellData was read from is empty.
// Arguments:
//   - cellData: string
function isCellEmpty(cellData) {
  return typeof(cellData) == "string" && cellData == "";
}

// Returns true if the character char is alphabetical, false otherwise.
function isAlnum(char) {
  return char >= 'A' && char <= 'Z' ||
    char >= 'a' && char <= 'z' ||
    isDigit(char);
}

// Returns true if the character char is a digit, false otherwise.
function isDigit(char) {
  return char >= '0' && char <= '9';
}