Drafts Directory

Action

review flashcards

Posted by dhaysom, Last update over 4 years ago

A simple system for reviewing notes in the form of spaced repetition flashcards.
Drafts forum post.

Tags

  • This action uses three types of tag:
    • flashcard: used to identify notes that are to be reviewed as flashcards
    • reviewYYYYMMDD: used to keep track of the date when flashcards are due
    • masteryX: used to calculate when the next review date will be

Making Flashcards

  • turn any note into a flashcard by adding the three tags listed above, e.g. flashcard, mastery1 and review20200716
  • the action convert to flashcard will add these tags automatically
  • use the line break (—-) to split the flashcards into different sides
    • sides will be revealed one at a time
    • there is no limit to the number of sides a flashcard can have

Reviewing Flashcards

  • when this action is run, it will find all notes with the flashcard tag and a review date tag that is on or before the current date
  • if you select “remembered”, the mastery count will be doubled
  • if you select “forgot”, the mastery count will be halved (down to a minimum of 1)
  • the new mastery count indicates the number of days before the next review
    • e.g. after remembering a card with the mastery2 tag on 20200716, the tag will be updated to mastery4, and the review date tag will be updated to review20200720
    • e.g. after forgetting a card with the mastery2 tag on 20200716, the tag will be updated the mastery1, and the review date tag will be updated to review20200717

Changes

1.01

  • added autoscroll on pressing the “flip” button
  • added dark mode
  • tweaked heading font sizes
  • divided CSS and functions into separate steps for clarity

Steps

  • script

    // CSS

let stylesheet = `
<style>
@charset "utf-8";

html { 
	font-size:150%;
	font-family: Avenir, Helvetica, Arial, Freesans, clean, sans-serif;
}
body {
	margin:0;
	padding:1em;
}
@media (max-device-width: 480px) { 

} 
@media (min-device-width: 481px) { 
	body {
		margin:auto;
		max-width:600px;
	} 
}

h1, h2, h3, h4, h5, h6 {
    font-weight: bold;
}

h1 {
    font-size: 1rem;
    border-bottom: 1px solid #CCCCCC;
}

h2 {
    border-bottom: 1px solid #CCCCCC;
    color: #000000;
    font-size: 1.25rem;
}

h3 {
    font-size: 1.1rem;
}

h4 {
    font-size: 1rem;
}

h5 {
    font-size: 1rem;
}

h6 {
    color: #777777;
    background-color: inherit;
    font-size: 14px;
}

hr {
    height: 0.2em;
    border: 0;
    color: #CCCCCC;
    background-color: #CCCCCC;
}

p, blockquote, ul, ol, dl, li, table, pre {
    margin: 1em 0;
}

blockquote {
	background:		#f9f9f9;
	border-left:	10px solid #ccc;
	margin:			1.5em 10px;
	padding:		.5em 10px;
}

code, pre {
    border-radius: 3px;
    background-color: #F8F8F8;
    color: inherit;
}

code {
    border: 1px solid #EAEAEA;
    margin: 0 2px;
    padding: 0 5px;
}

pre {
    border: 1px solid #CCCCCC;
    line-height: 1.25em;
    overflow: auto;
    padding: 6px 10px;
}

pre > code {
    border: 0;
    margin: 0;
    padding: 0;
}

a, a:visited {
    color: #4183C4;
    background-color: inherit;
    text-decoration: none;
}

table {
  margin: 1em 0;
  border: 1px solid #aaa;
  border-collapse: collapse;
}

th {
  padding:.25em .5em;
  background: #efefef;
  border: 1px solid #ccc;  
}

td {
  padding:.25em .5em;
  border: 1px solid #ccc;
}

img {
    max-width: 90%;
}

.flipbutton {
	background: #e7e7e7;
	border: none;
	padding: 1rem;
	text-align: center;
	text-decoration: none;
	margin: auto;
	width: 50%;
	font-family:'Avenir',sans-serif;
	font-size: 1rem;
	border-radius: 6px;
	display: block;
	box-shadow: none;
}

.yesbutton {
	background: #d2f8d2;
	border: none;
	padding: 1rem;
	text-align: center;
	text-decoration: none;
	margin: auto;
	width: 50%;
	font-family:'Avenir',sans-serif;
	font-size: 1rem;
	border-radius: 6px;
	display: block;
	box-shadow: none;
}

.nobutton {
	background: #f8d2d2;
	border: none;
	padding: 1rem;
	text-align: center;
	text-decoration: none;
	margin: auto;
	width: 50%;
	font-family:'Avenir',sans-serif;
	font-size: 1rem;
	border-radius: 6px;
	display: block;
	box-shadow: none;
}

.content {
	display: none;
}

#section1 {
	display: block;
}

@media (prefers-color-scheme: dark) {
  body {
    color: #eee;
    background: #121212;
  }

  body a {
    color: #809fff;
  }
  
  blockquote {
	background: #404040;
	border-left: 10px solid #686868;
	}
	
	th {
	  background: #404040;   
	}
  
  .flipbutton {
    background: #606060;
    color: #D3D3D3;
	}
	
	.yesbutton {
	  background: #093909;
	  color: #D3D3D3;
	}
	
	.nobutton {
	  background: #6C1111;
	  color: #D3D3D3;
	}
	
}

</style>

<script>

function yesButton() {
	Drafts.send("cardCheckButton", "remembered");
	Drafts.continue();
}

function noButton() {
	Drafts.send("cardCheckButton", "forgot");
	Drafts.continue()
}

function flipButton(divCount) {
	let nextSection = "section"+(divCount+1);
	let thisButton = "flipbutton"+divCount;
	document.getElementById(thisButton).style.display = "none";
	document.getElementById(nextSection).style.display = "block";
	document.getElementById(nextSection).scrollIntoView();
}

</script>
`

  • script

    let divCount = 1;

// format and number the divisions of each card

function divFormat(divContent) {
	return `<div class = 'content' id = 'section${divCount}'>`+divContent+`<br>
	<button id = 'flipbutton${divCount}' class = 'flipbutton' onclick = 'flipButton(${divCount})'>flip</button></div>`
	
//	<button onclick='document.getElementById("section${divCount+1}").style.display = "block"' class = 'flipbutton'>flip</button></div>`
}

// format the final division of the card with remembered/forgot buttons

function finalDivFormat(finalDivContent) {
	return `<div class = 'content' id = 'section${divCount}'>`+finalDivContent+`<br>
	<button name = "yesbutton1" class="yesbutton" onclick="yesButton()">remembered</button><button name = "nobutton1" class="nobutton" onclick="noButton()">forgot</button></div>
	`
}

// display card as HTML

function displayCard(cardInput) {
	let cardTitle = cardInput.title;
	// process markdown to HTML
	let cardContent = cardInput.processTemplate("%%[[body]]%%");
	// divide card into sections by line break
	let dividedCard = cardContent.split("<hr />");
	
	// assign div class and ID to each section
	divCount = 1;
	let dividedCardDivs = []
	for (let z = 0; z < (dividedCard.length-1); z++) {
		dividedCardDivs.push(divFormat(dividedCard[z]));
		divCount++;
	}
	dividedCardDivs.push(finalDivFormat(dividedCard[dividedCard.length - 1]));
	
	// display as HTML
	let cardHTML = "<html><head><title>" + cardTitle + "</title>" + stylesheet + "<body>" + dividedCardDivs.join("")+"</body>";
	return cardHTML;
}

// search all drafts for flashcard tag
let allCards = Draft.query("", "all", ["flashcard"], [], "modified", false, false);
let dueCards = [];

// get today's date

var now = new Date();

// format as YYYYMMDD

function yyyymmdd(dateInput) {
    var y = dateInput.getFullYear();
    var m = dateInput.getMonth() + 1;
    var d = dateInput.getDate();
    var mm = m < 10 ? '0' + m : m;
    var dd = d < 10 ? '0' + d : d;
    return '' + y + mm + dd;
}

currentDate = yyyymmdd(now);

// calculate the date for next review by adding mastery level to current date

function getReviewDate(date, days) {
	const copy = new Date(Number(date))
	copy.setDate(date.getDate() + days)
	return copy
}

for (let i = 0; i < allCards.length; i++) {
	let cardDueDate;
	let cardMastery;
	allCardTags = allCards[i].tags;
	// go through each tag of each card
	for (let j = 0; j < allCardTags.length; j++) {
		
		// find tag containing string "review"
		if (allCardTags[j].match(/review/) != null) {
		
			//identify card due date
			let dueDateTag = allCardTags[j]; 
			let dateMatch = dueDateTag.match(/(\d+)/);
			cardDueDate = dateMatch[0];
		
			if (currentDate >= cardDueDate) {
			
				// if due, remove old due date tag
				allCards[i].removeTag(allCardTags[j]);
				allCards[i].update();

				// if due, display card content
				let html = displayCard(allCards[i])
				let preview = HTMLPreview.create();
				preview.show(html);
				
				for (let k = 0; k < allCardTags.length; k++) {
					// find tag containing string "mastery"
					if (allCardTags[k].match(/mastery/) != null) {
						// identify mastery counter tag
						let cardMasteryTag = allCardTags[k];
						let cardMasteryMatch = cardMasteryTag.match(/(\d+)/);
						cardMastery = parseInt(cardMasteryMatch[0]);
						// remove old mastery counter tag
						allCards[i].removeTag(allCardTags[k]);
						allCards[i].update();
					}
				}
				
				// double card mastery counter if remembered, halve if forgotten
								
				let cardCheck = context.previewValues["cardCheckButton"];
				
				if (cardCheck === "remembered") {
					cardMastery = cardMastery * 2;
				}
				
				if ((cardCheck === "forgot") && (cardMastery > 1)) {
					cardMastery = cardMastery / 2;
				}
				
				
				// update review date with new mastery counter
				let nextReviewDate = getReviewDate(now, cardMastery);
				let nextReviewDateFormatted = yyyymmdd(nextReviewDate);
				// add new review date tag
				allCards[i].addTag("review"+nextReviewDateFormatted);
				// add new mastery counter tag
				allCards[i].addTag("mastery"+cardMastery);
				allCards[i].update();
				
			}
		}
	}	
}

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