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feat(kanban): migrate queued commands transactionally

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req: sync/014
This commit is contained in:
slhx agent
2026-07-13 18:06:47 +02:00
parent 3ace17f9f1
commit a17de85b4f
5 changed files with 251 additions and 38 deletions
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examples/kanban/static/sync.js
+38 -8
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@@ -1,5 +1,9 @@
const DATABASE = "hemx-kanban-v1";
const DATABASE_VERSION = 2;
const COMMANDS = "commands";
const COMMAND_SCHEMA = 2;
const LEGACY_COMMAND_SCHEMA = 1;
const MIGRATION_KEY = "commandSchemaMigration";
const MAX_ATTEMPTS = 3;
const BACKOFF_MS = [25, 50];
const root = document.querySelector("[data-kanban-sync]");
@@ -43,13 +47,31 @@ function transactionDone(transaction) {
});
}
function migrateCommandLog(request, oldVersion) {
const database = request.result;
if (!database.objectStoreNames.contains(COMMANDS)) database.createObjectStore(COMMANDS, { keyPath: "id" });
if (!database.objectStoreNames.contains("meta")) database.createObjectStore("meta");
if (oldVersion === 0 || oldVersion >= DATABASE_VERSION) return;
const transaction = request.transaction;
const commands = transaction.objectStore(COMMANDS);
const meta = transaction.objectStore("meta");
const all = commands.getAll();
all.addEventListener("success", () => {
const legacy = all.result;
if (legacy.some((command) => command.schemaVersion !== LEGACY_COMMAND_SCHEMA)) {
transaction.abort();
return;
}
for (const command of legacy) {
commands.put({ ...command, schemaVersion: COMMAND_SCHEMA, targetColumn: "done" });
}
meta.put({ from: LEGACY_COMMAND_SCHEMA, to: COMMAND_SCHEMA, migrated: legacy.length }, MIGRATION_KEY);
}, { once: true });
}
async function openLog() {
const request = indexedDB.open(DATABASE, 1);
request.addEventListener("upgradeneeded", () => {
const database = request.result;
if (!database.objectStoreNames.contains(COMMANDS)) database.createObjectStore(COMMANDS, { keyPath: "id" });
if (!database.objectStoreNames.contains("meta")) database.createObjectStore("meta");
});
const request = indexedDB.open(DATABASE, DATABASE_VERSION);
request.addEventListener("upgradeneeded", (event) => migrateCommandLog(request, event.oldVersion));
return requestResult(request);
}
@@ -124,7 +146,7 @@ function setPhase(phase, message) {
}
function validatePending(command) {
if (!command || command.schemaVersion !== 1 || command.kind !== "reorder_card" || typeof command.id !== "string" || !command.id || typeof command.cardId !== "string" || !command.cardId) {
if (!command || command.schemaVersion !== COMMAND_SCHEMA || command.kind !== "reorder_card" || typeof command.id !== "string" || !command.id || typeof command.cardId !== "string" || !command.cardId || command.targetColumn !== "done") {
throw new Error("invalid pending command");
}
return command;
@@ -155,7 +177,7 @@ async function upload(command) {
root.setAttribute("data-sync-attempts", String(attempt));
setPhase(attempt === 1 ? "uploading" : "retrying", `Uploading ${command.id} (attempt ${attempt} of ${MAX_ATTEMPTS}).`);
try {
const query = new URLSearchParams({ command_id: command.id, card_id: command.cardId });
const query = new URLSearchParams({ command_id: command.id, card_id: command.cardId, column: command.targetColumn });
const response = await fetch(`/sync/commands?${query}`, { method: "POST" });
if (response.status === 503 && attempt < MAX_ATTEMPTS) {
const base = BACKOFF_MS[attempt - 1];
@@ -342,6 +364,14 @@ async function start() {
uploadLimit = Number.parseInt(root.getAttribute("data-sync-upload-limit"), 10);
if (!Number.isSafeInteger(uploadLimit) || uploadLimit < 1) throw new Error("data-sync-upload-limit must be a positive integer");
database = await openLog();
const migration = await requestResult(database.transaction("meta", "readonly").objectStore("meta").get(MIGRATION_KEY));
root.setAttribute("data-sync-database-version", String(database.version));
root.setAttribute("data-sync-command-schema", String(COMMAND_SCHEMA));
if (migration) {
root.setAttribute("data-sync-migration-from", String(migration.from));
root.setAttribute("data-sync-migration-to", String(migration.to));
root.setAttribute("data-sync-migrated-count", String(migration.migrated));
}
const commands = await pendingCommands(database);
root.setAttribute("data-sync-uploaded-this-run", "0");
root.setAttribute("data-sync-uploaded-total", "0");