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
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
|
// tslint:disable-next-line:no-any
type ConsoleContext = Set<any>;
type ConsoleOptions = Partial<{
showHidden: boolean;
depth: number;
colors: boolean;
}>;
// Default depth of logging nested objects
const DEFAULT_MAX_DEPTH = 2;
// tslint:disable-next-line:no-any
function getClassInstanceName(instance: any): string {
if (typeof instance !== "object") {
return "";
}
if (instance) {
const proto = Object.getPrototypeOf(instance);
if (proto && proto.constructor) {
return proto.constructor.name; // could be "Object" or "Array"
}
}
return "";
}
function createFunctionString(value: Function, ctx: ConsoleContext): string {
// Might be Function/AsyncFunction/GeneratorFunction
const cstrName = Object.getPrototypeOf(value).constructor.name;
if (value.name && value.name !== "anonymous") {
// from MDN spec
return `[${cstrName}: ${value.name}]`;
}
return `[${cstrName}]`;
}
function createArrayString(
// tslint:disable-next-line:no-any
value: any[],
ctx: ConsoleContext,
level: number,
maxLevel: number
): string {
const entries: string[] = [];
for (const el of value) {
entries.push(stringifyWithQuotes(ctx, el, level + 1, maxLevel));
}
ctx.delete(value);
if (entries.length === 0) {
return "[]";
}
return `[ ${entries.join(", ")} ]`;
}
function createObjectString(
// tslint:disable-next-line:no-any
value: any,
ctx: ConsoleContext,
level: number,
maxLevel: number
): string {
const entries: string[] = [];
let baseString = "";
const className = getClassInstanceName(value);
let shouldShowClassName = false;
if (className && className !== "Object" && className !== "anonymous") {
shouldShowClassName = true;
}
for (const key of Object.keys(value)) {
entries.push(
`${key}: ${stringifyWithQuotes(ctx, value[key], level + 1, maxLevel)}`
);
}
ctx.delete(value);
if (entries.length === 0) {
baseString = "{}";
} else {
baseString = `{ ${entries.join(", ")} }`;
}
if (shouldShowClassName) {
baseString = `${className} ${baseString}`;
}
return baseString;
}
function stringify(
ctx: ConsoleContext,
// tslint:disable-next-line:no-any
value: any,
level: number,
maxLevel: number
): string {
switch (typeof value) {
case "string":
return value;
case "number":
case "boolean":
case "undefined":
case "symbol":
return String(value);
case "function":
return createFunctionString(value as Function, ctx);
case "object":
if (value === null) {
return "null";
}
if (ctx.has(value)) {
return "[Circular]";
}
if (level >= maxLevel) {
return `[object]`;
}
ctx.add(value);
if (value instanceof Error) {
return value.stack! || "";
} else if (Array.isArray(value)) {
// tslint:disable-next-line:no-any
return createArrayString(value as any[], ctx, level, maxLevel);
} else {
return createObjectString(value, ctx, level, maxLevel);
}
default:
return "[Not Implemented]";
}
}
// Print strings when they are inside of arrays or objects with quotes
function stringifyWithQuotes(
ctx: ConsoleContext,
// tslint:disable-next-line:no-any
value: any,
level: number,
maxLevel: number
): string {
switch (typeof value) {
case "string":
return `"${value}"`;
default:
return stringify(ctx, value, level, maxLevel);
}
}
export function stringifyArgs(
// tslint:disable-next-line:no-any
args: any[],
options: ConsoleOptions = {}
): string {
const out: string[] = [];
for (const a of args) {
if (typeof a === "string") {
out.push(a);
} else {
out.push(
// use default maximum depth for null or undefined argument
stringify(
// tslint:disable-next-line:no-any
new Set<any>(),
a,
0,
// tslint:disable-next-line:triple-equals
options.depth != undefined ? options.depth : DEFAULT_MAX_DEPTH
)
);
}
}
return out.join(" ");
}
type PrintFunc = (x: string, isErr?: boolean) => void;
export class Console {
constructor(private printFunc: PrintFunc) {}
// tslint:disable-next-line:no-any
log = (...args: any[]): void => {
this.printFunc(stringifyArgs(args));
};
debug = this.log;
info = this.log;
// tslint:disable-next-line:no-any
dir = (obj: any, options: ConsoleOptions = {}) => {
this.printFunc(stringifyArgs([obj], options));
};
// tslint:disable-next-line:no-any
warn = (...args: any[]): void => {
this.printFunc(stringifyArgs(args), true);
};
error = this.warn;
// tslint:disable-next-line:no-any
assert = (condition: boolean, ...args: any[]): void => {
if (!condition) {
throw new Error(`Assertion failed: ${stringifyArgs(args)}`);
}
};
}
|
