'use strict'
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const isHeaderConditional = require('./is-header-conditional')
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// Default cacache-based cache
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const Cache = require('../cache')
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module.exports = function initializeCache (opts) {
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/**
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* NOTE: `opts.cacheManager` is the path to cache
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* We're making the assumption that if `opts.cacheManager` *isn't* a string,
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* it's a cache object
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*/
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if (typeof opts.cacheManager === 'string') {
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// Need to make a cache object
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opts.cacheManager = new Cache(opts.cacheManager, opts)
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}
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opts.cache = opts.cache || 'default'
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if (opts.cache === 'default' && isHeaderConditional(opts.headers)) {
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// If header list contains `If-Modified-Since`, `If-None-Match`,
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// `If-Unmodified-Since`, `If-Match`, or `If-Range`, fetch will set cache
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// mode to "no-store" if it is "default".
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opts.cache = 'no-store'
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}
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}
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