Implement fields having multiple items in creator

assets/scripts/Field.js

@@ -10,6 +10,7 @@ export class Field {
 	categoryName = null;
 	isHidden = false;
 	isDisabled = false;
+	allowMultiple = false;
 
 	constructor(key) {
 		this.key = key;
@@ -55,4 +56,9 @@ export class Field {
 		this.isDisabled = true;
 		return this;
 	}
+
+	multiple() {
+		this.allowMultiple = true;
+		return this;
+	}
 }

assets/scripts/FieldInput.js

@@ -1,29 +1,66 @@
+import { FieldInputItem } from "./FieldInputItem.js";
+
 /**
  * Represents the actual input element on the creator tool
- * A field may have multiple inputs if it allows multiple values
+ * May contain multiple items if the field allows multiple values
  */
 export class FieldInput {
 	constructor(field, parentElem) {
 		this.field = field;
 		this.id = "field-" + field.key;
+		this.items = [];
+		this.parent = parentElem;
 
-		if (!field.isHidden)
-			parentElem.innerHTML += `
-				<label for="${field.key}">${field.displayName}</label>
-				<p class="description">${field.description ?? ""}</p>
-				${field.getInputHtml(this.id)}
-			`;
+		this.appendHtml(parentElem);
 	}
 
-	isValid() {
-		return this.field.isValidInput(this.id);
+	appendHtml(parent) {
+		const fieldContainer = document.createElement("div");
+		fieldContainer.className = "field-container";
+
+		const item = new FieldInputItem(this, fieldContainer);
+
+		if (!this.field.isHidden) {
+			parent.insertAdjacentHTML("beforeend", `
+				<label for="${this.field.key}">${this.field.displayName}</label>
+				<p class="description">${this.field.description ?? ""}</p>
+			`);
+
+			parent.appendChild(fieldContainer);
+
+			if (this.field.allowMultiple && this.items.length === 0) {
+				const addBtn = document.createElement("button");
+				addBtn.className = "text-button";
+				addBtn.type = "button";
+				addBtn.innerText = "+ Add";
+				addBtn.onclick = () => this.addItem(fieldContainer);
+				parent.appendChild(addBtn);
+			}
+		}
+
+		this.items.push(item);
+		this.updateItems();
 	}
 
-	getValue() {
-		return this.field.getInputValue(this.id);
+	updateItems() {
+		for (const item of this.items) item.update();
 	}
 
-	toString() {
-		return this.field.inputToString(this.id);
+	addItem(parent) {
+		const item = new FieldInputItem(this, parent);
+		this.items.push(item);
+
+		this.updateItems();
+	}
+
+	removeItem(id) {
+		const i = this.items.findIndex(item => item.id === id);
+
+		this.items[i].remove();
+		this.items.splice(i, 1);
+
+		this.updateItems();
+
+		this.parent.closest("form").onchange();
 	}
 }

assets/scripts/FieldInputItem.js

@@ -0,0 +1,60 @@
+export class FieldInputItem {
+	container = null;
+	removeBtn = null;
+
+	constructor(input, parentElem) {
+		this.input = input;
+		this.field = input.field;
+		this.id = input.id + (input.field.allowMultiple ? "-" + Math.random().toString().slice(2, 5) : "");
+
+		this.appendHtml(parentElem);
+	}
+
+	appendHtml(parent) {
+		const container = document.createElement("div");
+		container.style.display = "flex";
+		container.style.gap = "0.5rem";
+
+		if (this.field.allowMultiple) {
+			const wrapper = document.createElement("div");
+			wrapper.innerHTML = this.field.getInputHtml(this.id);
+			container.appendChild(wrapper);
+
+			const removeBtn = document.createElement("button");
+			removeBtn.type = "button";
+			removeBtn.className = "text-button";
+			removeBtn.innerHTML = "× Remove";
+			removeBtn.onclick = () => this.input.removeItem(this.id);
+			container.appendChild(removeBtn);
+
+			this.removeBtn = removeBtn;
+		} else {
+			container.innerHTML = this.field.getInputHtml(this.id);
+		}
+
+		parent.appendChild(container);
+		this.container = container;
+	}
+
+	update() {
+		if (this.removeBtn) {
+			this.removeBtn.style.display = this.input.items.length > 1 ? "inline-block" : "none";
+		}
+	}
+
+	remove() {
+		this.container.remove();
+	}
+
+	isValid() {
+		return this.field.isValidInput(this.id);
+	}
+
+	getValue() {
+		return this.field.getInputValue(this.id);
+	}
+
+	toString() {
+		return this.field.inputToString(this.id);
+	}
+}

assets/scripts/records/SpfRecord.js

@@ -86,10 +86,10 @@ export class SpfRecord {
 		this.text = text;
 	}
 
-	static createFromFieldInputs(fieldInputs) {
-		const tokens = fieldInputs
-			.filter(input => !input.field.isDisabled && input.isValid())
-			.map(input => input.toString());
+	static createFromFieldInputItems(items) {
+		const tokens = items
+			.filter(item => !item.field.isDisabled && item.isValid())
+			.map(item => item.toString());
 
 		const text = tokens.join(" ");
 

assets/scripts/records/TagListRecord.js

@@ -8,10 +8,10 @@ export class TagListRecord {
 		this.text = text;
 	}
 
-	static createFromFieldInputs(fieldInputs) {
-		const tokens = fieldInputs
-			.filter(input => !input.field.isDisabled && input.isValid())
-			.filter(input => !input.field.defaultValue || input.getValue() !== input.field.defaultValue)
+	static createFromFieldInputItems(items) {
+		const tokens = items
+			.filter(item => !item.field.isDisabled && item.isValid())
+			.filter(item => !item.field.defaultValue || item.getValue() !== item.field.defaultValue)
 			.map(input => input.toString());
 
 		const text = tokens.join("; ");

assets/scripts/spf/Term.js

@@ -5,7 +5,6 @@ export class Term extends Field {
 	separator = null;
 	isRequired = false;
 	position = null;
-	allowMultiple = false;
 	valueRequirement = ValueRequirement.REQUIRED;
 
 	constructor(key) {
@@ -52,11 +51,6 @@ export class Term extends Field {
 		return this;
 	}
 
-	multiple() {
-		this.allowMultiple = true;
-		return this;
-	}
-
 	value(requirement) {
 		this.valueRequirement = requirement;
 		return this;

assets/scripts/ui/creator.js

@@ -36,7 +36,12 @@ document.getElementById("form").onchange = generate;
 generate();
 
 function generate() {
-	const record = Record.createFromFieldInputs(inputs);
+	const items = [];
+	for (const input of inputs) {
+		items.push(...input.items);
+	}
+
+	const record = Record.createFromFieldInputItems(items);
 
 	document.getElementById("record").value = record.text;
 }

assets/styles/main.css

@@ -164,3 +164,23 @@ summary {
 summary:hover {
 	color: black;
 }
+
+.field-container {
+	display: flex;
+	flex-direction: column;
+	align-items: start;
+	gap: 0.5rem;
+	margin-bottom: 0.5rem;
+}
+
+.text-button {
+	background: none;
+	border: none;
+	cursor: pointer;
+	color: #757575;
+	transition: color 200ms;
+}
+
+.text-button:hover {
+	color: black;
+}