Implement custom combobox for account selection

Only on balance assertion edit page currently

drcr/journal/views.py

@@ -19,7 +19,7 @@ from flask import abort, redirect, render_template, request, url_for
 from .. import AMOUNT_DPS
 from ..database import db
 from ..models import Amount, Posting, Transaction, TrialBalancer
-from ..webapp import all_transactions, app
+from ..webapp import all_accounts, all_transactions, app
 from .models import BalanceAssertion
 from ..statements.models import StatementLineReconciliation
 
@@ -146,7 +146,7 @@ def balance_assertions():
 @app.route('/balance-assertions/new', methods=['GET', 'POST'])
 def balance_assertions_new():
 	if request.method == 'GET':
-		return render_template('journal/balance_assertions_edit.html', assertion=None)
+		return render_template('journal/balance_assertions_edit.html', assertion=None, accounts=all_accounts())
 	
 	quantity = round(float(request.form['amount']) * (10**AMOUNT_DPS))
 	if request.form['sign'] == 'cr':
@@ -172,7 +172,7 @@ def balance_assertions_edit():
 		abort(404)
 	
 	if request.method == 'GET':
-		return render_template('journal/balance_assertions_edit.html', assertion=assertion)
+		return render_template('journal/balance_assertions_edit.html', assertion=assertion, accounts=all_accounts())
 	
 	if request.form.get('action', None) == 'delete':
 		# Delete balance assertion

drcr/static/js/combobox.js

@@ -0,0 +1,64 @@
+/*  DrCr: Web-based double-entry bookkeeping framework
+    Copyright (C) 2022–2024  Lee Yingtong Li (RunasSudo)
+
+    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 <https://www.gnu.org/licenses/>.
+*/
+
+function updateComboboxInputs(elCombobox, elInput) {
+	elCombobox.querySelector('ul').querySelectorAll('li').forEach((elLi) => {
+		const liText = elLi.querySelector('.combobox-text').innerText;
+		if (liText.toLowerCase().startsWith(elInput.value.toLowerCase())) {
+			elLi.classList.remove('hidden');
+			elLi.classList.add('block');
+			
+			if (liText == elInput.value) {
+				elLi.dataset.selected = 'selected';
+			} else {
+				elLi.dataset.selected = '';
+			}
+		} else {
+			elLi.classList.remove('block');
+			elLi.classList.add('hidden');
+			elLi.dataset.selected = '';
+		}
+	});
+}
+
+// Init combobox
+document.querySelectorAll('.combobox').forEach((elCombobox) => {
+	const elInput = elCombobox.querySelector('input');
+	updateComboboxInputs(elCombobox, elInput);
+	
+	// Update combobox options on input
+	elInput.addEventListener('input', (evt) => {
+		updateComboboxInputs(elCombobox, elInput);
+	});
+	
+	// Open dropdown on click button
+	elCombobox.querySelector('button').addEventListener('click', (evt) => {
+		elInput.focus();
+	});
+});
+
+// Update combobox value on select
+document.querySelectorAll('.combobox').forEach((elCombobox) => {
+	const elInput = elCombobox.querySelector('input');
+	elCombobox.querySelector('ul').querySelectorAll('li').forEach((elLi) => {
+		elLi.addEventListener('mousedown', (evt) => {
+			const liText = elLi.querySelector('.combobox-text').innerText;
+			elInput.value = liText;
+			updateComboboxInputs(elCombobox, elInput);
+		});
+	});
+});

drcr/templates/journal/balance_assertions_edit.html

@@ -35,8 +35,25 @@
 					<input type="text" class="bordered-field" name="description" id="description" value="{{ assertion.description if assertion else '' }}">
 				</div>
 				<label for="account" class="block text-gray-900 pr-4">Account</label>
-				<div>
+				<div class="relative combobox">
-					<input type="text" class="bordered-field" name="account" id="account" value="{{ assertion.account if assertion else '' }}">
+					<input type="text" class="bordered-field peer" name="account" id="account" value="{{ assertion.account if assertion else '' }}" autocomplete="off">
+					<button type="button" class="absolute inset-y-0 right-0 flex items-center px-2 focus:outline-none">
+						<svg class="h-5 w-5 text-gray-400" viewBox="0 0 20 20" fill="currentColor">
+							<path fill-rule="evenodd" d="M10 3a.75.75 0 01.55.24l3.25 3.5a.75.75 0 11-1.1 1.02L10 4.852 7.3 7.76a.75.75 0 01-1.1-1.02l3.25-3.5A.75.75 0 0110 3zm-3.76 9.2a.75.75 0 011.06.04l2.7 2.908 2.7-2.908a.75.75 0 111.1 1.02l-3.25 3.5a.75.75 0 01-1.1 0l-3.25-3.5a.75.75 0 01.04-1.06z" clip-rule="evenodd" />
+						</svg>
+					</button>
+					<ul class="hidden peer-focus:block absolute z-10 mt-1 max-h-60 w-full overflow-auto bg-white py-1 text-base shadow-lg ring-1 ring-black ring-opacity-5 focus:outline-none sm:text-sm">
+						{% for account in accounts %}
+							<li class="group relative cursor-default select-none py-1 pl-3 pr-9 text-gray-900 hover:text-white hover:bg-indigo-600">
+								<span class="combobox-text block truncate group-data-[selected=selected]:font-semibold">{{ account }}</span>
+								<span class="hidden group-data-[selected=selected]:flex absolute inset-y-0 right-0 items-center pr-4 text-indigo-600 group-hover:text-white">
+									<svg class="h-5 w-5" viewBox="0 0 20 20" fill="currentColor">
+										<path fill-rule="evenodd" d="M16.704 4.153a.75.75 0 01.143 1.052l-8 10.5a.75.75 0 01-1.127.075l-4.5-4.5a.75.75 0 011.06-1.06l3.894 3.893 7.48-9.817a.75.75 0 011.05-.143z" clip-rule="evenodd" />
+									</svg>
+								</span>
+							</li>
+						{% endfor %}
+					</ul>
 				</div>
 				<label for="amount" class="block text-gray-900 pr-4">Balance</label>
 				<div class="relative shadow-sm">
@@ -63,3 +80,7 @@
 		</form>
 	</div>
 {% endblock %}
+
+{% block scripts %}
+	<script src="{{ url_for('static', filename='js/combobox.js') }}"></script>
+{% endblock %}

drcr/webapp.py

@@ -55,6 +55,10 @@ def all_transactions(start_date=None, end_date=None, join_postings=True):
 	
 	return transactions
 
+def all_accounts():
+	# TODO: Can this be cached?
+	return sorted(list(set(p.account for t in all_transactions() for p in t.postings)))
+
 def eofy_date():
 	"""Get the datetime for the end of the financial year"""