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45 lines
1.5 KiB
C++
45 lines
1.5 KiB
C++
/*
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* Copyright (c) 2023, Matthew Olsson <mattco@serenityos.org>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#include <LibJS/Runtime/VM.h>
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#include <LibWeb/Streams/AbstractOperations.h>
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#include <LibWeb/Streams/UnderlyingSource.h>
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#include <LibWeb/WebIDL/CallbackType.h>
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namespace Web::Streams {
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JS::ThrowCompletionOr<UnderlyingSource> UnderlyingSource::from_value(JS::VM& vm, JS::Value value)
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{
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if (!value.is_object())
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return UnderlyingSource {};
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auto& object = value.as_object();
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UnderlyingSource underlying_source {
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.start = TRY(property_to_callback(vm, value, "start", WebIDL::OperationReturnsPromise::No)),
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.pull = TRY(property_to_callback(vm, value, "pull", WebIDL::OperationReturnsPromise::Yes)),
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.cancel = TRY(property_to_callback(vm, value, "cancel", WebIDL::OperationReturnsPromise::Yes)),
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.type = {},
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.auto_allocate_chunk_size = {},
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};
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auto type_value = TRY(object.get("type"));
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if (!type_value.is_undefined()) {
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auto type_string = TRY(type_value.to_string(vm));
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if (type_string == "bytes"sv)
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underlying_source.type = ReadableStreamType::Bytes;
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else
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return vm.throw_completion<JS::TypeError>(DeprecatedString::formatted("Unknown stream type '{}'", type_value));
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}
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if (TRY(object.has_property("autoAllocateChunkSize")))
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underlying_source.auto_allocate_chunk_size = TRY(TRY(object.get("autoAllocateChunkSize")).to_bigint_uint64(vm));
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return underlying_source;
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}
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}
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