/
TransformInputFields.ts
194 lines (170 loc) · 6.61 KB
/
TransformInputFields.ts
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
import {
GraphQLSchema,
GraphQLType,
DocumentNode,
TypeInfo,
visit,
visitWithTypeInfo,
Kind,
FragmentDefinitionNode,
GraphQLInputObjectType,
ObjectValueNode,
ObjectFieldNode,
} from 'graphql';
import { Transform, Request, MapperKind, mapSchema } from '@graphql-tools/utils';
import { InputFieldTransformer, InputFieldNodeTransformer, InputObjectNodeTransformer } from '../types';
import { DelegationContext } from 'packages/delegate/src';
export default class TransformInputFields implements Transform {
private readonly inputFieldTransformer: InputFieldTransformer;
private readonly inputFieldNodeTransformer: InputFieldNodeTransformer;
private readonly inputObjectNodeTransformer: InputObjectNodeTransformer;
private transformedSchema: GraphQLSchema;
private mapping: Record<string, Record<string, string>>;
constructor(
inputFieldTransformer: InputFieldTransformer,
inputFieldNodeTransformer?: InputFieldNodeTransformer,
inputObjectNodeTransformer?: InputObjectNodeTransformer
) {
this.inputFieldTransformer = inputFieldTransformer;
this.inputFieldNodeTransformer = inputFieldNodeTransformer;
this.inputObjectNodeTransformer = inputObjectNodeTransformer;
this.mapping = {};
}
public transformSchema(originalSchema: GraphQLSchema): GraphQLSchema {
this.transformedSchema = mapSchema(originalSchema, {
[MapperKind.INPUT_OBJECT_TYPE]: (type: GraphQLInputObjectType) =>
this.transformFields(type, this.inputFieldTransformer),
});
return this.transformedSchema;
}
public transformRequest(originalRequest: Request, delegationContext: DelegationContext): Request {
const fragments = Object.create(null);
originalRequest.document.definitions
.filter(def => def.kind === Kind.FRAGMENT_DEFINITION)
.forEach(def => {
fragments[(def as FragmentDefinitionNode).name.value] = def;
});
const document = this.transformDocument(
originalRequest.document,
this.mapping,
this.inputFieldNodeTransformer,
this.inputObjectNodeTransformer,
delegationContext,
originalRequest
);
return {
...originalRequest,
document,
};
}
private transformFields(type: GraphQLInputObjectType, inputFieldTransformer: InputFieldTransformer): any {
const config = type.toConfig();
const originalInputFieldConfigMap = config.fields;
const newInputFieldConfigMap = {};
Object.keys(originalInputFieldConfigMap).forEach(fieldName => {
const originalInputFieldConfig = originalInputFieldConfigMap[fieldName];
const transformedField = inputFieldTransformer(type.name, fieldName, originalInputFieldConfig);
if (transformedField === undefined) {
newInputFieldConfigMap[fieldName] = originalInputFieldConfig;
} else if (Array.isArray(transformedField)) {
const newFieldName = transformedField[0];
const newFieldConfig = transformedField[1];
newInputFieldConfigMap[newFieldName] = newFieldConfig;
if (newFieldName !== fieldName) {
const typeName = type.name;
if (!(typeName in this.mapping)) {
this.mapping[typeName] = {};
}
this.mapping[typeName][newFieldName] = fieldName;
}
} else if (transformedField != null) {
newInputFieldConfigMap[fieldName] = transformedField;
}
});
if (!Object.keys(newInputFieldConfigMap).length) {
return null;
}
return new GraphQLInputObjectType({
...type.toConfig(),
fields: newInputFieldConfigMap,
});
}
private transformDocument(
document: DocumentNode,
mapping: Record<string, Record<string, string>>,
inputFieldNodeTransformer: InputFieldNodeTransformer,
inputObjectNodeTransformer: InputObjectNodeTransformer,
delegationContext: DelegationContext,
request: Request
): DocumentNode {
const typeInfo = new TypeInfo(this.transformedSchema);
const newDocument: DocumentNode = visit(
document,
visitWithTypeInfo(typeInfo, {
leave: {
[Kind.OBJECT]: (node: ObjectValueNode): ObjectValueNode => {
const parentType: GraphQLType = typeInfo.getInputType() as GraphQLInputObjectType;
if (parentType != null) {
const parentTypeName = parentType.name;
const newInputFields: Array<ObjectFieldNode> = [];
node.fields.forEach(inputField => {
const newName = inputField.name.value;
const transformedInputField =
inputFieldNodeTransformer != null
? inputFieldNodeTransformer(parentTypeName, newName, inputField, delegationContext, request)
: inputField;
if (Array.isArray(transformedInputField)) {
transformedInputField.forEach(individualTransformedInputField => {
const typeMapping = mapping[parentTypeName];
if (typeMapping == null) {
newInputFields.push(individualTransformedInputField);
return;
}
const oldName = typeMapping[newName];
if (oldName == null) {
newInputFields.push(individualTransformedInputField);
return;
}
newInputFields.push({
...individualTransformedInputField,
name: {
...individualTransformedInputField.name,
value: oldName,
},
});
});
return;
}
const typeMapping = mapping[parentTypeName];
if (typeMapping == null) {
newInputFields.push(transformedInputField);
return;
}
const oldName = typeMapping[newName];
if (oldName == null) {
newInputFields.push(transformedInputField);
return;
}
newInputFields.push({
...transformedInputField,
name: {
...transformedInputField.name,
value: oldName,
},
});
});
const newNode = {
...node,
fields: newInputFields,
};
return inputObjectNodeTransformer != null
? inputObjectNodeTransformer(parentTypeName, newNode, delegationContext, request)
: newNode;
}
},
},
})
);
return newDocument;
}
}