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module.exports.Batch = function <T>(batchSize: number): T[][] {
const batches: T[][] = [];
let i = 0;
while (i < this.length) {
const cap = Math.min(i + batchSize, this.length);
batches.push(this.slice(i, cap));
i = cap;
}
return batches;
};
module.exports.ExecuteBatches = function <I>(batchSize: number, handler: BatchHandlerSync<I>): void {
if (this.length) {
let completed = 0;
const batches = this.batch(batchSize);
const quota = batches.length;
for (let batch of batches) {
const context: BatchContext = {
completedBatches: completed,
remainingBatches: quota - completed,
isFullBatch: batch.length === batchSize
};
handler(batch, context);
completed++;
}
}
};
module.exports.ConvertInBatches = function <I, O>(batchSize: number, handler: BatchConverterSync<I, O>): O[] {
if (!this.length) {
return [];
}
let collector: O[] = [];
let completed = 0;
const batches = this.batch(batchSize);
const quota = batches.length;
for (let batch of batches) {
const context: BatchContext = {
completedBatches: completed,
remainingBatches: quota - completed,
isFullBatch: batch.length === batchSize
};
collector.push(...handler(batch, context));
completed++;
}
return collector;
};
module.exports.ExecuteInBatchesAsync = async function <I>(batchSize: number, handler: BatchHandler<I>): Promise<void> {
if (this.length) {
let completed = 0;
const batches = this.batch(batchSize);
const quota = batches.length;
for (let batch of batches) {
const context: BatchContext = {
completedBatches: completed,
remainingBatches: quota - completed,
isFullBatch: batch.length === batchSize
};
await handler(batch, context);
completed++;
}
}
};
module.exports.ConvertInBatchesAsync = async function <I, O>(batchSize: number, handler: BatchConverter<I, O>): Promise<O[]> {
if (!this.length) {
return [];
}
let collector: O[] = [];
let completed = 0;
const batches = this.batch(batchSize);
const quota = batches.length;
for (let batch of batches) {
const context: BatchContext = {
completedBatches: completed,
remainingBatches: quota - completed,
isFullBatch: batch.length === batchSize
};
collector.push(...(await handler(batch, context)));
completed++;
}
return collector;
};
module.exports.ExecuteInBatchesAtInterval = async function <I>(batchSize: number, handler: BatchHandler<I>, interval: number): Promise<void> {
if (!this.length) {
return;
}
const batches = this.batch(batchSize);
const quota = batches.length;
return new Promise<void>(async resolve => {
const iterator = batches[Symbol.iterator]();
let completed = 0;
while (true) {
const next = iterator.next();
await new Promise<void>(resolve => {
setTimeout(async () => {
const batch = next.value;
const context: BatchContext = {
completedBatches: completed,
remainingBatches: quota - completed,
isFullBatch: batch.length === batchSize
};
await handler(batch, context);
resolve();
}, interval * 1000);
});
if (++completed === quota) {
break;
}
}
resolve();
});
};
module.exports.ConvertInBatchesAtInterval = async function <I, O>(batchSize: number, handler: BatchConverter<I, O>, interval: number): Promise<O[]> {
if (!this.length) {
return [];
}
let collector: O[] = [];
const batches = this.batch(batchSize);
const quota = batches.length;
return new Promise<O[]>(async resolve => {
const iterator = batches[Symbol.iterator]();
let completed = 0;
while (true) {
const next = iterator.next();
await new Promise<void>(resolve => {
setTimeout(async () => {
const batch = next.value;
const context: BatchContext = {
completedBatches: completed,
remainingBatches: quota - completed,
isFullBatch: batch.length === batchSize
};
collector.push(...(await handler(batch, context)));
resolve();
}, interval * 1000);
});
if (++completed === quota) {
resolve(collector);
break;
}
}
});
};
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