Creates a Safety file from

create_safetyfile.gs

/**
 * Generate Google Docs based on a template document and data incoming from a Google Spreadsheet
 *
 * License: MIT
 *
 * Copyright 2013 Mikko Ohtamaa, http://opensourcehacker.com
 * 
 * Modified by Gal Bracha for http://dreams.midburnerot.com
 * This is the source file from which we generate the Safety file template
 * https://docs.google.com/document/d/1jTb-7Y3ApVchQwqfw7CcKstBNAt8-rmwtLMYU4oi2jk/edit?usp=sharing
 * The output is a CSV File created from the admin panel of http://dreams.midburnerot.com
 */

// Google Doc id from the document template
// (Get ids from the URL)
var SOURCE_TEMPLATE = "1jTb-7Y3ApVchQwqfw7CcKstBNAt8-rmwtLMYU4oi2jk";

// In which spreadsheet we have all the dreams data
var DREAMS_SPREADSHEET = "1b-1BCeh7C48-yTogvEQBrQuYaJ9RLJEZljr1X6ANbyQ";

// In which Google Drive folder we toss the target documents (Id)
var TARGET_FOLDER = "0B-uj4x8Jf3gWZVV0UVFrN1RTQkE";

var DREAMS_URL_FOR_IMAGES = 'http://dreams.midburnerot.com/dreams/';

// We will read the number of columns into this dynamic var
var columnLength;
/**
 * Return spreadsheet row content as JS array.
 *
 * Note: We assume the row ends when we encounter
 * the first empty cell. This might not be 
 * sometimes the desired behavior.
 *
 * Rows start at 1, not zero based!!! 🙁
 *
 */
function getRowAsArray(sheet, row) {
  var dataRange = sheet.getRange(row, 1, 1, 99);
  var data = dataRange.getValues();
  var columns = [];

  for (i in data) {
    var row = data[i];

    Logger.log("Got row", row);

    for(var l=0; l<99; l++) {
        var col = row[l];
        // First empty column interrupts unless columnLength is set
        if(!columnLength && !col) {
            break;
        }
        // We first get number of columns then we count to number of columns
        if(columnLength && l >= columnLength){
          break;
        }

        columns.push(col);
    }
  }

  return columns;
}

/**
 * Duplicates a Google Apps doc
 *
 * @return a new document with a given name from the orignal
 */
function createDuplicateDocument(sourceId, name) {
    var source = DriveApp.getFileById(sourceId);
    var newFile = source.makeCopy(name);

    var targetFolder = DriveApp.getFolderById(TARGET_FOLDER);
    targetFolder.addFile(newFile);
    newFile.getParents().next().removeFile(newFile);
    return DocumentApp.openById(newFile.getId());
}

/**
 * Search a paragraph in the document and replaces it with the generated text 
 */
function replaceParagraph(doc, keyword, newText) {
  var ps = doc.getParagraphs();
  for(var i=0; i<ps.length; i++) {
    var p = ps[i];
    var text = p.getText();

    if(text.indexOf(keyword) >= 0) {
      if(newText) {
        p.setText(newText);
      }else {
        p.setText(" ");
      }
      break;
    }
  } 
}

/**
 * Script entry point
 */
function generateSafetyFiles() {
  var data = SpreadsheetApp.openById(DREAMS_SPREADSHEET);
  
  // Fetch variable names
  // they are column names in the spreadsheet
  var sheet = data.getSheets()[0];
  var numberOfRows = sheet.getLastRow();
  numberOfRows = 9;//TODO
  for(var row=2; row <= numberOfRows; row++) {
    generateSafetyFile(row);
  }
}


function getImages(dreamId) {
  var result = [];
  Logger.log("Getting image " + dreamId);
  var response = UrlFetchApp.fetch(DREAMS_URL_FOR_IMAGES + dreamId);
  page_content = response.getContentText();
  var imageIndex = page_content.indexOf('thumbnail');
  while(imageIndex != -1) {
   var imgUrl = extractNextImageUrl(page_content,imageIndex);
   result.push(imgUrl);
   Logger.log(imgUrl);
   imageIndex = page_content.indexOf('thumbnail', imageIndex+1);
  }
  return result;
}

function insertImage(doc, imgUrl) {
  var image = UrlFetchApp.fetch(imgUrl);
  Logger.log(imgUrl);
  var imagesParagraph = findImagesParagraph(doc);
  var inlineImage = imagesParagraph.appendInlineImage(image.getBlob());
  fixImageRatio(inlineImage);
  imagesParagraph.appendText("\r\n");
}

function fixImageRatio(inlineImage) {
  var MAX_HEIGHT = 900;
  var MAX_WIDTH = 900;
  var width = inlineImage.getWidth();
  var newW = width;
  var height = inlineImage.getHeight();
  var newH = height;
  var ratio = width/height;
  
  if(width>MAX_WIDTH){
    newW = MAX_WIDTH;
    newH = parseInt(newW/ratio);
    if(newH > MAX_HEIGHT) {
      newH = MAX_HEIGHT;
      newW = parseInt(newH/ratio);
    }
  }else if(height > MAX_HEIGHT) {
      newH = MAX_HEIGHT;
      newW = parseInt(newH/ratio);
   }
  inlineImage.setWidth(newW).setHeight(newH);
}

function findImagesParagraph(doc) {
  var imageTag = "תמונות:";

  var ps = doc.getParagraphs();
  for(var i=0; i<ps.length; i++) {
    var p = ps[i];
    var text = p.getText();

    if(text.indexOf(imageTag) >= 0) {
      return p;
    }
  }
}

function extractNextImageUrl(html_content, index) {
  var imgStartIndex = html_content.indexOf('http',index);
  var imgEndIndex = html_content.indexOf('"',imgStartIndex);
  return html_content.substring(imgStartIndex, imgEndIndex);
}

function generateSafetyFile(rowNumber) {
  var data = SpreadsheetApp.openById(DREAMS_SPREADSHEET);
  if(!rowNumber) {
      return; 
  }

  // Fetch variable names
  // they are column names in the spreadsheet
  var sheet = data.getSheets()[0];
  var columns = getRowAsArray(sheet, 1);
  columnLength = columns.length;

  Logger.log("Processing columns:" + columns);

  var customerData = getRowAsArray(sheet, rowNumber);  
  Logger.log("Processing data:" + customerData);

  // Assume second column holds the name of the dream
  var dreamName = customerData[1];

  var target = createDuplicateDocument(SOURCE_TEMPLATE, dreamName);

  Logger.log("Created new document:" + target.getId());

  for(var i=0; i<columns.length; i++) {
      var key = columns[i] + ":"; 
      // We don't replace the whole text, but leave the template text as a label
      var text = customerData[i] || ""; // No Javascript undefined
      replaceParagraph(target, key, text);
  }
  
  // Replace Images
  var dreamId = customerData[0];
  var imagesUrlArr = getImages(dreamId);
  Logger.log("Found " + imagesUrlArr + " Images");
  for(var i=0;i<imagesUrlArr.length;i++) {
     insertImage(target, imagesUrlArr[i]);
  }
}

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