How to connect some functions for result

Question

UPD: Decided

It's script.google.com question.

I have Spreadsheet with information (row - data \ column - time), every cell inside is number of free "spaces".

Example:

Date\Time | 11:00:00 | 15:00:00 | 17:00:00
01.09.2019|    10    |    15    |    30
02.09.2019|    10    |    15    |    30
03.09.2019|    10    |    15    |    30
04.09.2019|    10    |    15    |    30

After inputting in Web form date and time - program should show me how much "space" is free.

• Now have 3 steps after web form :
  1. Get row from form (data)
  2. Get column from form (time)
  3. Get cell value and return it in form (sheet.getRange(row, col).getValue();)

How to connect 3 functions together?

// Get information from form

<script>   
function getEmptySpace(){       
     var presentDate = document.getElementById("dt").value;
     var presentTime = document.getElementById("tm").value;    
     if(presentDate.length >= 10 && presentTime.length >= 8){
  google.script.run.withSuccessHandler(updateEmptySpaceAdult).getSpaceAdult(presentDate,presentTime);             
       }  
     }

     function updateEmptySpaceAdult(spaceAdult){      
        document.getElementById("anav").value = spaceAdult;        
     }
</script>

// My 3 functions, which sholud get cell value and return it in form

//Function 1 - getRowNum

function getRowNum(){
  var sheet = SpreadsheetApp.openByUrl(url).getSheetByName("Ticket");
  var data = sheet.getDataRange().getValues();
  var name = "19.12.2018";  //Here should be arg "presentDate" (.getSpaceAdult(presentDate,presentTime);)
  for(var i = 0; i<data.length;i++){
    if(data[i][0] == name){ //[0] because serch in column A      
      return i+1;
    }
  }
}

//Function 2 - getColNum

function getColNum() {
  var sheet = SpreadsheetApp.openByUrl(url).getSheetByName("Ticket");
  var time = "17:00:00"; //Here should be arg "presentTime" (.getSpaceAdult(presentDate,presentTime);)
  var range = sheet.getRange(2, 1, 1, sheet.getMaxColumns());
  var values = range.getValues();
  
  for (var row in values) {
    for (var col in values[row]) {
      if (values[row][col] == time) {
         return parseInt(col) + 1;
      }
    }
  }
}

//Function 3 - getCellValue

function getCellValue(){
var sheet = SpreadsheetApp.openByUrl(url).getSheetByName("Ticket");
var row = 8.0;
var col = 4.0;

var value = sheet.getRange(row, col).getValue();
}

// I think main Function is - .getSpaceAdult(presentDate,presentTime)

function getSpaceAdult(presentDate,presentTime){
*Call Function 1 - getRowNum() with arg "presentDate" and get RowNumber
*Call Function 2 - getColNum() with arg "presentTime" and get ColNumber
*Call Function 3 - getCellValue() by returns "getRowNum and getColNum" and show tabel cell value
In the end function getSpaceAdult = tabel cell value
} 

Answer 1

To Read and practice:

• Functions MDN reference
• Legal parameters
• Compare dates

Script Logic:

• Declare all functions taking appropriate arguments
• Remove duplicate calling of Spreadsheet service within each function.

Snippets:

function getRowNum(date, sheet){
  //receives two arguments date and sheet.
  //DO NOT REDCLARE date and sheet using `var`: var sheet =... or var date =
  //REMOVEDvar sheet = SpreadsheetApp.openByUrl(url).getSheetByName("Ticket");
  var data = sheet.getDataRange().getValues();
  //REMOVEDvar name = "19.12.2018";  //Here should be arg "presentDate" (.getSpaceAdult(presentDate,presentTime);)
  for(var i = 0; i<data.length;i++){
    if(data[i][0] == date){ //[0] because serch in column A      
      return i+1;
    }
  }
}

function getColNum(time, sheet) {
  //receives two arguments time and sheet.
  //DO NOT REDCLARE date and sheet using `var`: var sheet =... or var time =
  /*Rest of your code except  declarations of time/ sheet
   *
   */
}

function getSpaceAdult(date, time){
  var sheet = SpreadsheetApp.openByUrl(url).getSheetByName("Ticket");
  var row = getRowNum(date, sheet); //Get row number passing on two arguments date and sheet
  var col = getColNum(time, sheet);
  var value = sheet.getRange(row, col).getValue();
  return value;//Added
}

Notes:

• getValues() returns Object[][]: Some/All of received values maybe date objects. Date objects cannot be compared with ==. You may use getDisplayValues() instead to get dates as strings.