Sorting Dates in Custom Google Sheets Calendar - excel

Question

I am trying to populate a calendar with google sheets in the following way :
I have a sheet called processing which has all the projects and their dates (some use one date and some use up until 14 consecutive days). And then I have a sheet called Calendar with the actual calendar to filter all the dates.
I would like to display the project name for every calendar day that it is booked in the processing sheet.
Please see below screenshots
Processing sheet :
Here is the closest to working function I have tried :
=IFERROR(QUERY(Processing!$A$3:$V,"select A where E = date '"&text(H4,"yyyy-mm-dd")&"' or F = date '"&text(H4,"yyyy-mm-dd")&"' or G = date '"&text(H4,"yyyy-mm-dd")&"' or H = date '"&text(H4,"yyyy-mm-dd")&"' or I = date '"&text(H4,"yyyy-mm-dd")&"' or H = date '"&text(H4,"yyyy-mm-dd")&"' or J = date '"&text(H4,"yyyy-mm-dd")&"' or K = date '"&text(H4,"yyyy-mm-dd")&"' or L = date '"&text(H4,"yyyy-mm-dd")&"' or M = date '"&text(H4,"yyyy-mm-dd")&"' or N = date '"&text(H4,"yyyy-mm-dd")&"' or O = date '"&text(H4,"yyyy-mm-dd")&"' or P = date '"&text(H4,"yyyy-mm-dd")&"' or Q = date '"&text(H4,"yyyy-mm-dd")&"' or R = date '"&text(H4,"yyyy-mm-dd")&"' or S = date '"&text(H4,"yyyy-mm-dd")&"' or T = date '"&text(H4,"yyyy-mm-dd")&"' or U = date '"&text(H4,"yyyy-mm-dd")&"' or V = date '"&text(H4,"yyyy-mm-dd")&"'",1),"")
So basically on the Calendar I want to reflect/filter all values in Processing sheets column A's value that has a date matching the calendar day - so far it works only for every project's first day - but not all days.
Any help would be greatly appreciated.
Spreadsheet Link
https://docs.google.com/spreadsheets/d/1sowkIl_BcsbPoc9PUMZHL2bM7-XNMql2dV3yJo58-Sc/edit?usp=sharing

Answer 1

You can do the following, using Apps Script:
Store an object based on the data in Processing, in which the keys refer to the different dates, and the values are arrays with the different projects (in the code below, that's called datesAndProjects).
Using the A1 notation where the dates are located in Calendar (that is, B4:K4, B16:K16, B28:K28), loop through the different dates, and for each date, find the corresponding property in datesAndProjects and write the corresponding values (the projects) in that column.
Below is a detailed example of how this can be done (check inline comments for more in-depth explanation).
Code snippet:
// Copyright 2020 Google LLC.
// SPDX-License-Identifier: Apache-2.0
function projectToCalendar() {
const ss = SpreadsheetApp.getActive();
const sourceSheet = ss.getSheetByName("Processing");
const sourceData = sourceSheet.getRange(2, 1, sourceSheet.getLastRow()-1, sourceSheet.getLastColumn()).getValues();
let datesAndProjects = {};
sourceData.forEach(row => { // Iterate through each row in "Processing"
const project = row.shift(); // Retrieve first value in each row (project names)
row.forEach(val => {
if (val instanceof Date) { // Check if value is Date
const time = getDayTime(val); // Convert date to milliseconds since Epoch in order to compare them
if (!datesAndProjects[time]) datesAndProjects[time] = []; // Inititalize property if it doesn't exist
datesAndProjects[time].push([project]); // Add project to date
}
});
});
const targetSheet = ss.getSheetByName("Calendar");
const dateRangeNotations = ["B4:K4", "B16:K16", "B28:K28"]; // A1 notations where dates are located
targetSheet.getRangeList(dateRangeNotations).getRanges().forEach(range => { // Iterate through each row with dates
const times = range.getValues()[0].map(date => getDayTime(date)); // Get ms since Epoch in order to compare dates
times.forEach((time, i) => { // Iterate each date (ms)
if (datesAndProjects[time]) { // Check if property exists
targetSheet.getRange(range.getRow() + 2, range.getColumn() + i, datesAndProjects[time].length).setValues(datesAndProjects[time]); // Write values at corresponding column, starting two rows after date cell
}
});
});
}
function getDayTime(date) {
return new Date(date.getFullYear(), date.getMonth(), date.getDate()).getTime();
}
Note:
In this snippet, setValues is being called inside a loop, something which is not optimal for efficiency purposes. This could probably be improved, but I think this snippet is enough for you to get the idea.