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const {
ObjectDefineProperties,
SymbolToStringTag,
} = primordials;
const {
codes: {
ERR_INVALID_THIS,
ERR_MISSING_OPTION,
},
} = require('internal/errors');
const {
customInspectSymbol: kInspect,
kEnumerableProperty,
} = require('internal/util');
const {
customInspect,
isBrandCheck,
kType,
kState,
} = require('internal/webstreams/util');
const {
validateObject,
} = require('internal/validators');
const isByteLengthQueuingStrategy =
isBrandCheck('ByteLengthQueuingStrategy');
const isCountQueuingStrategy =
isBrandCheck('CountQueuingStrategy');
/**
* @callback QueuingStrategySize
* @param {any} chunk
* @returns {number}
*/
/**
* @typedef {{
* highWaterMark : number,
* size? : QueuingStrategySize,
* }} QueuingStrategy
*/
// eslint-disable-next-line func-name-matching,func-style
const byteSizeFunction = function size(chunk) { return chunk.byteLength; };
// eslint-disable-next-line func-name-matching,func-style
const countSizeFunction = function size() { return 1; };
/**
* @type {QueuingStrategy}
*/
class ByteLengthQueuingStrategy {
[kType] = 'ByteLengthQueuingStrategy';
get [SymbolToStringTag]() { return this[kType]; }
/**
* @param {{
* highWaterMark : number
* }} init
*/
constructor(init) {
validateObject(init, 'init');
if (init.highWaterMark === undefined)
throw new ERR_MISSING_OPTION('options.highWaterMark');
// The highWaterMark value is not checked until the strategy
// is actually used, per the spec.
this[kState] = {
highWaterMark: +init.highWaterMark,
};
}
/**
* @readonly
* @type {number}
*/
get highWaterMark() {
if (!isByteLengthQueuingStrategy(this))
throw new ERR_INVALID_THIS('ByteLengthQueuingStrategy');
return this[kState].highWaterMark;
}
/**
* @type {QueuingStrategySize}
*/
get size() {
if (!isByteLengthQueuingStrategy(this))
throw new ERR_INVALID_THIS('ByteLengthQueuingStrategy');
return byteSizeFunction;
}
[kInspect](depth, options) {
return customInspect(depth, options, this[kType], {
highWaterMark: this.highWaterMark,
});
}
}
ObjectDefineProperties(ByteLengthQueuingStrategy.prototype, {
highWaterMark: kEnumerableProperty,
size: kEnumerableProperty,
});
/**
* @type {QueuingStrategy}
*/
class CountQueuingStrategy {
[kType] = 'CountQueuingStrategy';
get [SymbolToStringTag]() { return this[kType]; }
/**
* @param {{
* highWaterMark : number
* }} init
*/
constructor(init) {
validateObject(init, 'init');
if (init.highWaterMark === undefined)
throw new ERR_MISSING_OPTION('options.highWaterMark');
// The highWaterMark value is not checked until the strategy
// is actually used, per the spec.
this[kState] = {
highWaterMark: +init.highWaterMark,
};
}
/**
* @readonly
* @type {number}
*/
get highWaterMark() {
if (!isCountQueuingStrategy(this))
throw new ERR_INVALID_THIS('CountQueuingStrategy');
return this[kState].highWaterMark;
}
/**
* @type {QueuingStrategySize}
*/
get size() {
if (!isCountQueuingStrategy(this))
throw new ERR_INVALID_THIS('CountQueuingStrategy');
return countSizeFunction;
}
[kInspect](depth, options) {
return customInspect(depth, options, this[kType], {
highWaterMark: this.highWaterMark,
});
}
}
ObjectDefineProperties(CountQueuingStrategy.prototype, {
highWaterMark: kEnumerableProperty,
size: kEnumerableProperty,
});
module.exports = {
ByteLengthQueuingStrategy,
CountQueuingStrategy,
};
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