39 lines
1.2 KiB
JavaScript
39 lines
1.2 KiB
JavaScript
'use strict'
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const ModuleError = require('module-error')
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const hasOwnProperty = Object.prototype.hasOwnProperty
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const rangeOptions = new Set(['lt', 'lte', 'gt', 'gte'])
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module.exports = function (options, keyEncoding) {
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const result = {}
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for (const k in options) {
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if (!hasOwnProperty.call(options, k)) continue
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if (k === 'keyEncoding' || k === 'valueEncoding') continue
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if (k === 'start' || k === 'end') {
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throw new ModuleError(`The legacy range option '${k}' has been removed`, {
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code: 'LEVEL_LEGACY'
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})
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} else if (k === 'encoding') {
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// To help migrating to abstract-level
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throw new ModuleError("The levelup-style 'encoding' alias has been removed, use 'valueEncoding' instead", {
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code: 'LEVEL_LEGACY'
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})
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}
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if (rangeOptions.has(k)) {
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// Note that we don't reject nullish and empty options here. While
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// those types are invalid as keys, they are valid as range options.
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result[k] = keyEncoding.encode(options[k])
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} else {
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result[k] = options[k]
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}
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}
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result.reverse = !!result.reverse
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result.limit = Number.isInteger(result.limit) && result.limit >= 0 ? result.limit : -1
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return result
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}
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