کانتینرهای تزریق وابستگی در جاوا اسکریپت — از صفر تا صد

1class Frog {
2  constructor(name, gender) {
3    this.name = name
4    this.gender = gender
5  }
6  
7  jump() {
8    console.log('jumped')
9  }
10}
11
12class Toad {
13  constructor(habitat, name, gender) {
14    this.habitat = habitat
15    this.frog = new Frog(name, gender)
16  }
17}
18
19const mikeTheToad = new Toad('land', 'mike', 'male')

1class Toad {
2  constructor(habitat, name, gender, weight) {
3    this.habitat = habitat
4    this.frog = new Frog(name, gender, weight)
5  }
6}

1class Toad {
2  constructor(habitat, name, gender, weight) {
3    this.habitat = habitat
4    this.frog = new Frog(name, gender, weight)
5  }
6}

1class Frog {
2  constructor({ name, gender, weight }) {
3    this.name = name
4    this.gender = gender
5    this.weight = weight
6  }
7  
8  jump() {
9    console.log('jumped')
10  }
11}
12
13class Toad {
14  constructor(habitat, frog) {
15    this.habitat = habitat
16    this.frog = frog
17  }
18}

1const mikeTheToad = new Toad(
2  'land',
3  new Frog({
4    name: 'mike',
5    gender: 'male',
6    weight: 12.5,
7  }),
8)

1class Frog {
2  constructor({ name, gender, weight }) {
3    this.name = name
4    this.gender = gender
5    this.weight = weight
6  }
7  
8  jump() {
9    console.log('jumped')
10  }
11  
12  setHabitat(habitat) {
13    this.habitat = habitat
14  }
15}
16
17class Toad extends Frog {
18  constructor(options) {
19    super(options)
20  }
21  
22  leap() {
23    console.log('leaped')
24  }
25}
26
27class Person {
28  constructor() {
29    this.id = createId()
30  }
31  
32  setName(name) {
33    this.name = name
34    return this
35  }
36  
37  setGender(gender) {
38    this.gender = gender
39    return this
40  }
41  
42  setAge(age) {
43    this.age = age
44    return this
45  }
46}
47
48function createId() {
49  var idStrLen = 32
50  var idStr = (Math.floor(Math.random() * 25) + 10).toString(36) + '_'
51  idStr += new Date().getTime().toString(36) + '_'
52  do {
53    idStr += Math.floor(Math.random() * 35).toString(36)
54  } while (idStr.length < idStrLen)
55  return idStr
56}
57
58class FrogAdoptionFacility {
59  constructor(name, description, location) {
60    this.name = name
61    this.description = description
62    this.location = location
63    this.contracts = {}
64    this.adoptions = {}
65  }
66  
67  createContract(employee, client) {
68    const contractId = createId()
69    this.contracts[contractId] = {
70      id: contractId,
71      preparer: employee,
72      client,
73      signed: false,
74    }
75    return this.contracts[contractId]
76  }
77  
78  signContract(id, signee) {
79    this.contracts[id].signed = true
80  }
81  
82  setAdoption(frogOwner, frogOwnerLicense, frog, contract) {
83    const adoption = {
84      [frogOwner.id]: {
85        owner: {
86          firstName: frogOwner.owner.name.split(' ')[0],
87          lastName: frogOwner.owner.name.split(' ')[1],
88          id: frogOwner.id,
89        },
90        frog,
91        contract,
92        license: {
93          id: frogOwnerLicense.id,
94        },
95      },
96    }
97    this.adoptions[contract.id] = adoption
98  }
99  
100  getAdoption(id) {
101    return this.adoptions[id]
102  }
103}
104
105class FrogParadiseLicense {
106  constructor(frogOwner, licensePreparer, frog, location) {
107    this.id = createId()
108    this.client = {
109      firstName: frogOwner.name.split(' ')[0],
110      lastName: frogOwner.name.split(' ')[1],
111      id: frogOwner.id,
112    }
113    this.preparer = {
114      firstName: licensePreparer.name.split(' ')[0],
115      lastName: licensePreparer.name.split(' ')[1],
116      id: licensePreparer.id,
117    }
118    this.frog = frog
119    this.location = `${location.street} ${location.city} ${location.state} ${location.zip}`
120  }
121}
122
123class FrogParadiseOwner {
124  constructor(frogOwner, frogOwnerLicense, frog) {
125    this.id = createId()
126    this.owner = {
127      id: frogOwner.id,
128      firstName: frogOwner.name.split(' ')[0],
129      lastName: frogOwner.name.split(' ')[1],
130    }
131    this.license = frogOwnerLicense
132    this.frog = frog
133  }
134  
135  createDocument() {
136    return JSON.stringify(this, null, 2)
137  }
138}

1const facilityTitle = 'Frog Paradise'
2
3const facilityDescription =
4  'Your new one-stop location for fresh frogs from the sea! ' +
5  'Our frogs are housed with great care from the best professionals all over the world. ' +
6  'Our frogs make great companionship from a wide variety of age groups, from toddlers to ' +
7  'senior adults! What are you waiting for? ' +
8  'Buy a frog today and begin an unforgettable adventure with a companion you dreamed for!'
9
10const facilityLocation = {
11  address: '1104 Bodger St',
12  suite: '#203',
13  state: 'NY',
14  country: 'USA',
15  zip: 92804,
16}
17
18const frogParadise = new FrogAdoptionFacility(
19  facilityTitle,
20  facilityDescription,
21  facilityLocation,
22)
23
24const mikeTheToad = new Toad({
25  name: 'mike',
26  gender: 'male',
27  weight: 12.5,
28})
29
30const sally = new Person()
31sally
32  .setName('sally tran')
33  .setGender('female')
34  .setAge(27)
35  
36const richardTheEmployee = new Person()
37richardTheEmployee
38  .setName('richard rodriguez')
39  .setGender('male')
40  .setAge(77)
41  
42const contract = frogParadise.createContract(richardTheEmployee, sally)
43frogParadise.signContract(contract.id, sally)
44
45const sallysLicense = new FrogParadiseLicense(
46  sally,
47  richardTheEmployee,
48  mikeTheToad,
49  facilityLocation,
50)
51
52const sallyAsPetOwner = new FrogParadiseOwner(sally, sallysLicense, mikeTheToad)
53frogParadise.setAdoption(sallyAsPetOwner, sallysLicense, mikeTheToad, contract)
54
55const adoption = frogParadise.getAdoption(contract.id)
56console.log(JSON.stringify(adoption, null, 2))

1class FrogParadiseOwner {
2  constructor(frogOwner, frogOwnerLicense, frog) {
3    this.id = createId()
4    this.owner = frogOwner
5    this.license = frogOwnerLicense
6    this.frog = frog
7  }
8  
9  createDocument() {
10    return JSON.stringify(this, null, 2)
11  }
12}

1class FrogParadiseOwner {
2  constructor(frogOwner, frogOwnerLicense, frog) {
3    this.id = createId()
4    this.owner = frogOwner
5    this.license = frogOwnerLicense
6    this.frog = frog
7  }
8  
9  createDocument() {
10    return JSON.stringify(this, null, 2)
11  }
12}

1class Client extends Person {
2  
3  setName(name) {
4    this.name = name
5  }
6}

1import parseFunction from 'parse-function'
2
3const app = parseFunction({
4  ecmaVersion: 2017,
5})
6
7class DIC {
8  constructor() {
9    this.dependencies = {}
10    this.factories = {}
11  }
12  
13  register(name, dependency) {
14    this.dependencies[name] = dependency
15  }
16  
17  factory(name, factory) {
18    this.factories[name] = factory
19  }
20  
21  get(name) {
22    if (!this.dependencies[name]) {
23      const factory = this.factories[name]
24      if (factory) {
25        this.dependencies[name] = this.inject(factory)
26      } else {
27        throw new Error('No module found for: ' + name)
28      }
29    }
30    return this.dependencies[name]
31  }
32  
33  inject(factory) {
34    const fnArgs = app.parse(factory).args.map((arg) => this.get(arg))
35    return new factory(...fnArgs)
36  }
37}

1class Client extends Person {
2  setName(name) {
3    this.name = name
4  }
5}
6
7const dic = new DIC()
8dic.register('frogOwner', Client)
9dic.register('frogOwnerLicense', sallysLicense)
10dic.register('frog', mikeTheToad)
11dic.factory('frog-owner', FrogParadiseOwner)
12
13const frogOwner = dic.get('frog-owner')

1const frogOwner = new FrogParadiseOwner(Client, sallysLicense, mikeTheToad)
2// some other location
3const frogOwner2 = new FrogParadiseOwner(...)
4// some other location
5const frogOwner3 = new FrogParadiseOwner(...)
6// some other location
7const frogOwner4 = new FrogParadiseOwner(...)
8// some other location
9const frogOwner5 = new FrogParadiseOwner(...)

1class DIC {
2  constructor() {
3    this.dependencies = {}
4    this.factories = {}
5  }
6  
7  register(name, dependency) {
8    this.dependencies[name] = dependency
9  }
10  
11  factory(name, factory) {
12    this.factories[name] = factory
13  }
14  
15  get(name, args) {
16    if (!this.dependencies[name]) {
17      const factory = this.factories[name]
18      if (factory) {
19        this.dependencies[name] = this.inject(factory, args)
20      } else {
21        throw new Error('No module found for: ' + name)
22      }
23    }
24    return this.dependencies[name]
25  }
26  
27  inject(factory, args = []) {
28    const fnArgs = args.map((arg) => this.get(arg))
29    return new factory(...fnArgs)
30  }
31}

1const dic = new DIC()
2dic.register('frogOwner', Client)
3dic.register('frogOwnerLicense', sallysLicense)
4dic.register('frog', mikeTheToad)
5dic.factory('frog-owner', FrogParadiseOwner)
6
7const frogOwner = dic.get('frog-owner', [
8  'frogOwner',
9  'frogOwnerLicense',
10  'frog',
11])
12
13console.log('frog-owner', JSON.stringify(frogOwner, null, 2))

1{
2  "id": "u_k8q16rjx_fgrw6b0yb528unp3trokb",
3  "license": {
4    "id": "m_k8q16rjk_jipoch164dsbpnwi23xin",
5    "client": {
6      "firstName": "sally",
7      "lastName": "tran",
8      "id": "b_k8q16rjk_0xfqodlst2wqh0pxcl91j"
9    },
10    "preparer": {
11      "firstName": "richard",
12      "lastName": "rodriguez",
13      "id": "g_k8q16rjk_f13fbvga6j2bjfmriir63"
14    },
15    "frog": {
16      "name": "mike",
17      "gender": "male",
18      "weight": 12.5
19    },
20    "location": "undefined undefined NY 92804"
21  },
22  "frog": {
23    "name": "mike",
24    "gender": "male",
25    "weight": 12.5
26  }
27}