| 1 | import createLoaders from './loaders'
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| 2 |
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| 3 | const debug = require('debug')('graphbrainz:context')
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| 4 |
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| 5 | export function extendContext (extension, context, options) {
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| 6 | if (extension.extendContext) {
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| 7 | if (typeof extension.extendContext === 'function') {
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| 8 | debug(`Extending context via a function from the “${extension.name}” extension.`)
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| 9 | context = extension.extendContext(context, options)
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| 10 | } else {
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| 11 | throw new Error(
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| 12 | `Extension “${extension.name}” contains an invalid \`extendContext\` ` +
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| 13 | `value: ${extension.extendContext}`
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| 14 | )
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| 15 | }
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| 16 | }
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| 17 | return context
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| 18 | }
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| 19 |
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| 20 | export function createContext (options) {
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| 21 | const { client } = options
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| 22 | const loaders = createLoaders(client)
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| 23 | const context = { client, loaders }
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| 24 | return options.extensions.reduce((context, extension) => {
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| 25 | return extendContext(extension, context, options)
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| 26 | }, context)
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| 27 | }
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