1 | 'use strict'
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2 |
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3 | const assert = require('assert')
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4 | const registeredPlugins = Symbol.for('registered-plugin')
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5 | const {
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6 | kReply,
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7 | kRequest
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8 | } = require('./symbols.js')
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9 |
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10 | function getMeta (fn) {
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11 | return fn[Symbol.for('plugin-meta')]
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12 | }
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13 |
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14 | function shouldSkipOverride (fn) {
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15 | return !!fn[Symbol.for('skip-override')]
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16 | }
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17 |
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18 | function checkDependencies (fn) {
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19 | const meta = getMeta(fn)
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20 | if (!meta) return
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21 |
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22 | const dependencies = meta.dependencies
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23 | if (!dependencies) return
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24 | assert(Array.isArray(dependencies), 'The dependencies should be an array of strings')
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25 |
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26 | dependencies.forEach(dependency => {
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27 | assert(
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28 | this[registeredPlugins].indexOf(dependency) > -1,
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29 | `The dependency '${dependency}' of plugin '${meta.name}' is not registered`
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30 | )
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31 | })
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32 | }
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33 |
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34 | function checkDecorators (fn) {
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35 | const meta = getMeta(fn)
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36 | if (!meta) return
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37 |
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38 | const decorators = meta.decorators
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39 | if (!decorators) return
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40 |
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41 | if (decorators.fastify) _checkDecorators.call(this, 'Fastify', decorators.fastify)
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42 | if (decorators.reply) _checkDecorators.call(this[kReply], 'Reply', decorators.reply)
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43 | if (decorators.request) _checkDecorators.call(this[kRequest], 'Request', decorators.request)
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44 | }
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45 |
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46 | function _checkDecorators (instance, decorators) {
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47 | assert(Array.isArray(decorators), 'The decorators should be an array of strings')
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48 |
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49 | decorators.forEach(decorator => {
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50 | assert(
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51 | instance === 'Fastify' ? decorator in this : decorator in this.prototype,
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52 | `The decorator '${decorator}' is not present in ${instance}`
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53 | )
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54 | })
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55 | }
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56 |
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57 | function registerPluginName (fn) {
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58 | const meta = getMeta(fn)
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59 | if (!meta) return
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60 |
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61 | const name = meta.name
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62 | if (!name) return
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63 | this[registeredPlugins].push(name)
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64 | }
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65 |
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66 | function registerPlugin (fn) {
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67 | registerPluginName.call(this, fn)
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68 | checkDecorators.call(this, fn)
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69 | checkDependencies.call(this, fn)
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70 | return shouldSkipOverride(fn)
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71 | }
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72 |
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73 | module.exports = {
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74 | registeredPlugins,
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75 | registerPlugin
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76 | }
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77 |
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78 | module.exports[Symbol.for('internals')] = {
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79 | shouldSkipOverride,
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80 | getMeta,
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81 | checkDecorators,
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82 | checkDependencies
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83 | }
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