5 files changed, 115 insertions, 6 deletions
diff --git a/web/source/settings/lib/form/array.ts b/web/source/settings/lib/form/array.ts
new file mode 100644
index 000000000..7ddf9499c
--- /dev/null
+++ b/web/source/settings/lib/form/array.ts
@@ -0,0 +1,92 @@
+/*
+	GoToSocial
+	Copyright (C) GoToSocial Authors admin@gotosocial.org
+	SPDX-License-Identifier: AGPL-3.0-or-later
+
+	This program is free software: you can redistribute it and/or modify
+	it under the terms of the GNU Affero General Public License as published by
+	the Free Software Foundation, either version 3 of the License, or
+	(at your option) any later version.
+
+	This program is distributed in the hope that it will be useful,
+	but WITHOUT ANY WARRANTY; without even the implied warranty of
+	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+	GNU Affero General Public License for more details.
+
+	You should have received a copy of the GNU Affero General Public License
+	along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+import { useRef, useMemo } from "react";
+
+import type {
+	CreateHookNames,
+	HookOpts,
+	ArrayInputHook,
+	HookedForm,
+} from "./types";
+import getFormMutations from "./get-form-mutations";
+
+function parseFields(entries: HookedForm[], length: number): HookedForm[] {
+	const fields: HookedForm[] = [];
+
+	for (let i = 0; i < length; i++) {
+		if (entries[i] != undefined) {
+			fields[i] = Object.assign({}, entries[i]);
+		} else {
+			fields[i] = {};
+		}
+	}
+
+	return fields;
+}
+
+export default function useArrayInput(
+	{ name }: CreateHookNames,
+	{
+		initialValue,
+		length = 0,
+	}: HookOpts,
+): ArrayInputHook {
+	const _default: HookedForm[] = Array(length);
+	const fields = useRef<HookedForm[]>(_default);
+
+	const value = useMemo(
+		() => parseFields(initialValue, length),
+		[initialValue, length],
+	);
+
+	function hasUpdate() {
+		return Object.values(fields.current).some((fieldSet) => {
+			const { updatedFields } = getFormMutations(fieldSet, { changedOnly: true });
+			return updatedFields.length > 0;
+		});
+	}
+
+	return {
+		_default,
+		name,
+		Name: "",
+		value,
+		ctx: fields.current,
+		maxLength: length,
+		hasChanged: hasUpdate,
+		selectedValues() {
+			if (hasUpdate()) {
+				return Object.values(fields.current)
+					// Extract all form fields.
+					.flatMap((fieldSet) => {
+						return getFormMutations(
+							fieldSet,
+							{ changedOnly: false },
+						).updatedFields;
+					})
+					// Get just value from each
+					// field, discarding name.
+					.map((field) => field.value);
+			} else {
+				return [];
+			}
+		}
+	};
+}
diff --git a/web/source/settings/lib/form/field-array.tsx b/web/source/settings/lib/form/field-array.tsx
index 275bf2b1b..1239f033e 100644
--- a/web/source/settings/lib/form/field-array.tsx
+++ b/web/source/settings/lib/form/field-array.tsx
@@ -42,7 +42,7 @@ function parseFields(entries: HookedForm[], length: number): HookedForm[] {
 	return fields;
 }
 
-export default function useArrayInput(
+export default function useFieldArrayInput(
 	{ name }: CreateHookNames,
 	{
 		initialValue,
diff --git a/web/source/settings/lib/form/get-form-mutations.ts b/web/source/settings/lib/form/get-form-mutations.ts
index a3dc36601..0959fcf95 100644
--- a/web/source/settings/lib/form/get-form-mutations.ts
+++ b/web/source/settings/lib/form/get-form-mutations.ts
@@ -22,7 +22,12 @@ import { FormInputHook, HookedForm } from "./types";
 export default function getFormMutations(
 	form: HookedForm,
 	{ changedOnly }: { changedOnly: boolean },
-) {
+): {
+	updatedFields: FormInputHook<any>[];
+	mutationData: {
+		[k: string]: any;
+	};
+} {
 	const updatedFields: FormInputHook[] = [];
 	const mutationData: Array<[string, any]> = [];
 	
@@ -34,7 +39,7 @@ export default function getFormMutations(
 		}
 		
 		if ("selectedValues" in field) {
-			// FieldArrayInputHook.
+			// (Field)ArrayInputHook.
 			const selected = field.selectedValues();
 			if (!changedOnly || selected.length > 0) {
 				updatedFields.push(field);
diff --git a/web/source/settings/lib/form/index.ts b/web/source/settings/lib/form/index.ts
index 20de33eda..409ef0328 100644
--- a/web/source/settings/lib/form/index.ts
+++ b/web/source/settings/lib/form/index.ts
@@ -26,6 +26,7 @@ import bool from "./bool";
 import radio from "./radio";
 import combobox from "./combo-box";
 import checklist from "./check-list";
+import array from "./array";
 import fieldarray from "./field-array";
 
 import type {
@@ -37,8 +38,9 @@ import type {
 	FileFormInputHook,
 	BoolFormInputHook,
 	ComboboxFormInputHook,
-	FieldArrayInputHook,
 	ChecklistInputHook,
+	FieldArrayInputHook,
+	ArrayInputHook,
 } from "./types";
 
 function capitalizeFirst(str: string) {
@@ -110,5 +112,6 @@ export const useBoolInput = inputHook(bool) as (_name: string, _opts?: HookOpts<
 export const useRadioInput = inputHook(radio) as (_name: string, _opts?: HookOpts<string>) => RadioFormInputHook;
 export const useComboBoxInput = inputHook(combobox) as (_name: string, _opts?: HookOpts<string>) => ComboboxFormInputHook;
 export const useCheckListInput = inputHook(checklist) as (_name: string, _opts?: HookOpts<boolean>) => ChecklistInputHook;
+export const useArrayInput = inputHook(array) as (_name: string, _opts?: HookOpts<string[]>) => ArrayInputHook;
 export const useFieldArrayInput = inputHook(fieldarray) as (_name: string, _opts?: HookOpts<string>) => FieldArrayInputHook;
 export const useValue = value as <T>(_name: string, _initialValue: T) => FormInputHook<T>;
diff --git a/web/source/settings/lib/form/types.ts b/web/source/settings/lib/form/types.ts
index 8ea194df7..17fbec53a 100644
--- a/web/source/settings/lib/form/types.ts
+++ b/web/source/settings/lib/form/types.ts
@@ -141,6 +141,10 @@ interface _withNew {
 }
 
 interface _withSelectedValues {
+	selectedValues: () => string[];
+}
+
+interface _withSelectedFieldValues {
 	selectedValues: () => {
 		[_: string]: any;
 	}[]
@@ -200,11 +204,16 @@ export interface ComboboxFormInputHook extends FormInputHook<string>,
 	_withNew,
 	_withReset {}
 
-export interface FieldArrayInputHook extends FormInputHook<HookedForm[]>,
+export interface ArrayInputHook extends FormInputHook<HookedForm[]>,
 	_withSelectedValues,
 	_withMaxLength,
 	_withCtx {}
 
+export interface FieldArrayInputHook extends FormInputHook<HookedForm[]>,
+	_withSelectedFieldValues,
+	_withMaxLength,
+	_withCtx {}
+
 export interface Checkable {
 	key: string;
 	checked?: boolean;
@@ -213,7 +222,7 @@ export interface Checkable {
 export interface ChecklistInputHook<T = Checkable> extends FormInputHook<{[k: string]: T}>,
 	_withReset,
 	_withToggleAll,
-	_withSelectedValues,
+	_withSelectedFieldValues,
 	_withSomeSelected,
 	_withUpdateMultiple {
 		// Uses its own funky onChange handler.