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import asyncDB from './async';
const limit = 1024;
function put(name, objects, callback) {
asyncDB.then(db => {
const putTransaction = db.transaction(name, 'readwrite');
const putStore = putTransaction.objectStore(name);
const putIndex = putStore.index('id');
objects.forEach(object => {
function add() {
putStore.add(object);
}
putIndex.getKey(object.id).onsuccess = retrieval => {
if (retrieval.target.result) {
putStore.delete(retrieval.target.result).onsuccess = add;
} else {
add();
}
};
});
putTransaction.oncomplete = () => {
const readTransaction = db.transaction(name, 'readonly');
const readStore = readTransaction.objectStore(name);
readStore.count().onsuccess = count => {
const excess = count.target.result - limit;
if (excess > 0) {
readStore.getAll(null, excess).onsuccess =
retrieval => callback(retrieval.target.result.map(({ id }) => id));
}
};
};
});
}
export function evictAccounts(ids) {
asyncDB.then(db => {
const transaction = db.transaction(['accounts', 'statuses'], 'readwrite');
const accounts = transaction.objectStore('accounts');
const accountsIdIndex = accounts.index('id');
const accountsMovedIndex = accounts.index('moved');
const statuses = transaction.objectStore('statuses');
const statusesIndex = statuses.index('account');
function evict(toEvict) {
toEvict.forEach(id => {
accountsMovedIndex.getAllKeys(id).onsuccess =
({ target }) => evict(target.result);
statusesIndex.getAll(id).onsuccess =
({ target }) => evictStatuses(target.result.map(({ id }) => id));
accountsIdIndex.getKey(id).onsuccess =
({ target }) => target.result && accounts.delete(target.result);
});
}
evict(ids);
});
}
export function evictStatus(id) {
return evictStatuses([id]);
}
export function evictStatuses(ids) {
asyncDB.then(db => {
const store = db.transaction('statuses', 'readwrite').objectStore('statuses');
const idIndex = store.index('id');
const reblogIndex = store.index('reblog');
ids.forEach(id => {
reblogIndex.getAllKeys(id).onsuccess =
({ target }) => target.result.forEach(reblogKey => store.delete(reblogKey));
idIndex.getKey(id).onsuccess =
({ target }) => target.result && store.delete(target.result);
});
});
}
export function putAccounts(records) {
put('accounts', records, evictAccounts);
}
export function putStatuses(records) {
put('statuses', records, evictStatuses);
}
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