@aurigma/design-atoms/Utils/AsyncHelper.js

Design Atoms is a part of Customer's Canvas SDK which allows for manipulating individual design elements through your code.

export class ExecutionToken {
}
class ExecutionTokenImpl extends ExecutionToken {
}
export class AsyncHelper {
    static getExecutionToken() {
        return new ExecutionTokenImpl();
    }
    static executeSingle(token, getTask, getContinueTask = null) {
        if (!(token instanceof ExecutionTokenImpl))
            throw new Error("token must be acquired using method getExecutionToken");
        if (token.currentExecutionPromise != null)
            return token.currentExecutionPromise;
        token.getContinueTask = getContinueTask;
        token.currentExecutionPromise = new Promise(async (resolve, reject) => {
            try {
                await getTask();
                if (token.getContinueTask)
                    await token.getContinueTask();
                resolve();
            }
            catch (ex) {
                reject(ex);
            }
            finally {
                token.currentExecutionPromise = null;
            }
        });
        return token.currentExecutionPromise;
    }
}
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