/
misc.ts
184 lines (164 loc) · 4.42 KB
/
misc.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
/**
* @fileoverview Really small utility functions that didn't deserve their own files
*/
import { AST_NODE_TYPES, TSESLint, TSESTree } from '@typescript-eslint/utils';
import { requiresQuoting } from '@typescript-eslint/type-utils';
/**
* Check if the context file name is *.d.ts or *.d.tsx
*/
function isDefinitionFile(fileName: string): boolean {
return /\.d\.tsx?$/i.test(fileName || '');
}
/**
* Upper cases the first character or the string
*/
function upperCaseFirst(str: string): string {
return str[0].toUpperCase() + str.slice(1);
}
function arrayGroupByToMap<T, Key extends string | number>(
array: T[],
getKey: (item: T) => Key,
): Map<Key, T[]> {
const groups = new Map<Key, T[]>();
for (const item of array) {
const key = getKey(item);
const existing = groups.get(key);
if (existing) {
existing.push(item);
} else {
groups.set(key, [item]);
}
}
return groups;
}
/** Return true if both parameters are equal. */
type Equal<T> = (a: T, b: T) => boolean;
function arraysAreEqual<T>(
a: T[] | undefined,
b: T[] | undefined,
eq: (a: T, b: T) => boolean,
): boolean {
return (
a === b ||
(a !== undefined &&
b !== undefined &&
a.length === b.length &&
a.every((x, idx) => eq(x, b[idx])))
);
}
/** Returns the first non-`undefined` result. */
function findFirstResult<T, U>(
inputs: T[],
getResult: (t: T) => U | undefined,
): U | undefined {
for (const element of inputs) {
const result = getResult(element);
if (result !== undefined) {
return result;
}
}
return undefined;
}
/**
* Gets a string representation of the name of the index signature.
*/
function getNameFromIndexSignature(node: TSESTree.TSIndexSignature): string {
const propName: TSESTree.PropertyName | undefined = node.parameters.find(
(parameter: TSESTree.Parameter): parameter is TSESTree.Identifier =>
parameter.type === AST_NODE_TYPES.Identifier,
);
return propName ? propName.name : '(index signature)';
}
enum MemberNameType {
Private = 1,
Quoted = 2,
Normal = 3,
Expression = 4,
}
/**
* Gets a string name representation of the name of the given MethodDefinition
* or PropertyDefinition node, with handling for computed property names.
*/
function getNameFromMember(
member:
| TSESTree.MethodDefinition
| TSESTree.TSMethodSignature
| TSESTree.TSAbstractMethodDefinition
| TSESTree.PropertyDefinition
| TSESTree.TSAbstractPropertyDefinition
| TSESTree.Property
| TSESTree.TSPropertySignature,
sourceCode: TSESLint.SourceCode,
): { type: MemberNameType; name: string } {
if (member.key.type === AST_NODE_TYPES.Identifier) {
return {
type: MemberNameType.Normal,
name: member.key.name,
};
}
if (member.key.type === AST_NODE_TYPES.PrivateIdentifier) {
return {
type: MemberNameType.Private,
name: `#${member.key.name}`,
};
}
if (member.key.type === AST_NODE_TYPES.Literal) {
const name = `${member.key.value}`;
if (requiresQuoting(name)) {
return {
type: MemberNameType.Quoted,
name: `"${name}"`,
};
} else {
return {
type: MemberNameType.Normal,
name,
};
}
}
return {
type: MemberNameType.Expression,
name: sourceCode.text.slice(...member.key.range),
};
}
type ExcludeKeys<
TObj extends Record<string, unknown>,
TKeys extends keyof TObj,
> = { [k in Exclude<keyof TObj, TKeys>]: TObj[k] };
type RequireKeys<
TObj extends Record<string, unknown>,
TKeys extends keyof TObj,
> = ExcludeKeys<TObj, TKeys> & { [k in TKeys]-?: Exclude<TObj[k], undefined> };
function getEnumNames<T extends string>(myEnum: Record<T, unknown>): T[] {
return Object.keys(myEnum).filter(x => isNaN(parseInt(x))) as T[];
}
/**
* Given an array of words, returns an English-friendly concatenation, separated with commas, with
* the `and` clause inserted before the last item.
*
* Example: ['foo', 'bar', 'baz' ] returns the string "foo, bar, and baz".
*/
function formatWordList(words: string[]): string {
if (!words?.length) {
return '';
}
if (words.length === 1) {
return words[0];
}
return [words.slice(0, -1).join(', '), words.slice(-1)[0]].join(' and ');
}
export {
arrayGroupByToMap,
arraysAreEqual,
Equal,
ExcludeKeys,
findFirstResult,
formatWordList,
getEnumNames,
getNameFromIndexSignature,
getNameFromMember,
isDefinitionFile,
MemberNameType,
RequireKeys,
upperCaseFirst,
};