/
metadataReader.ts
146 lines (126 loc) · 5.13 KB
/
metadataReader.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
import * as ts from 'typescript';
import {FileResolver} from './fileResolver/fileResolver';
import {AbstractResolver, MetadataUrls} from './urlResolvers/abstractResolver';
import {UrlResolver} from './urlResolvers/urlResolver';
import {PathResolver} from './urlResolvers/pathResolver';
import {logger} from '../util/logger';
import {Config} from './config';
import {
DirectiveMetadata, ComponentMetadata, CodeWithSourceMap, TemplateMetadata, StylesMetadata,
StyleMetadata
} from './metadata';
import {Maybe, unwrapFirst, ifTrue, listToMaybe,} from '../util/function';
import {
callExpression, withIdentifier, hasProperties,
isSimpleTemplateString, getStringInitializerFromProperty, decoratorArgument
} from '../util/astQuery';
import {getTemplate, getInlineStyle} from '../util/ngQuery';
const normalizeTransformed = (t: CodeWithSourceMap) => {
if (!t.map) {
t.source = t.code;
}
return t;
};
/**
* For async implementation https://gist.github.com/mgechev/6f2245c0dfb38539cc606ea9211ecb37
*/
export class MetadataReader {
constructor(private _fileResolver: FileResolver, private _urlResolver?: AbstractResolver) {
this._urlResolver = this._urlResolver || new UrlResolver(new PathResolver());
}
read(d: ts.ClassDeclaration): DirectiveMetadata {
let componentMetadata = unwrapFirst(
(d.decorators || ([] as ts.Decorator[])).map((dec: ts.Decorator) => {
return Maybe.lift(dec).bind(callExpression)
.bind(withIdentifier('Component'))
.fmap(() => this.readComponentMetadata(d, dec));
}));
let directiveMetadata = unwrapFirst(
(d.decorators || ([] as ts.Decorator[])).map((dec: ts.Decorator) =>
Maybe.lift(dec)
.bind(callExpression)
.bind(withIdentifier('Directive'))
.fmap(() => this.readDirectiveMetadata(d, dec))
));
return directiveMetadata || componentMetadata || undefined;
}
protected readDirectiveMetadata(d: ts.ClassDeclaration, dec: ts.Decorator): DirectiveMetadata {
const selector = this.getDecoratorArgument(dec)
.bind(expr => getStringInitializerFromProperty('selector', expr.properties))
.fmap(initializer => initializer.text);
return Object.assign(new DirectiveMetadata(), {
controller: d,
decorator: dec,
selector: selector.unwrap(),
});
}
protected readComponentMetadata(d: ts.ClassDeclaration, dec: ts.Decorator) {
const expr = this.getDecoratorArgument(dec);
const directiveMetadata = this.readDirectiveMetadata(d, dec);
const external_M = expr.fmap(() => this._urlResolver.resolve(dec));
const template_M: Maybe<TemplateMetadata> = external_M.bind(external =>
this.readComponentTemplateMetadata(dec, external));
const style_M: Maybe<StylesMetadata> = external_M.bind(external =>
this.readComponentStylesMetadata(dec, external));
return Object.assign(new ComponentMetadata(), directiveMetadata, {
template: template_M.unwrap(),
styles: style_M.unwrap(),
});
}
protected getDecoratorArgument(decorator: ts.Decorator): Maybe<ts.ObjectLiteralExpression> {
return decoratorArgument(decorator)
.bind(ifTrue(hasProperties));
}
protected readComponentTemplateMetadata(dec: ts.Decorator, external: MetadataUrls): Maybe<TemplateMetadata> {
// Resolve Inline template
return getTemplate(dec)
.fmap(inlineTemplate => ({
template: normalizeTransformed(Config.transformTemplate(inlineTemplate.text, null, dec)),
url: null,
node: inlineTemplate,
})
).catch(() => // If there's no valid inline template, we resolve external template
Maybe.lift(external.templateUrl)
.bind(url =>
this._resolve(url).fmap(template => ({
template: normalizeTransformed(Config.transformTemplate(template, url, dec)),
url,
node: null
}))
)
);
}
protected readComponentStylesMetadata(dec: ts.Decorator, external: MetadataUrls): Maybe<StylesMetadata> {
return getInlineStyle(dec).fmap(inlineStyles =>
// Resolve Inline styles
inlineStyles.elements.map((inlineStyle: ts.Expression) => {
if (isSimpleTemplateString(inlineStyle)) {
return {
style: normalizeTransformed(Config.transformStyle(inlineStyle.text, null, dec)),
url: null,
node: inlineStyle as ts.Node,
};
}
}).filter(v => !!v)
).catch(() => // If there's no valid inline styles, we resolve external styles
Maybe.lift(external.styleUrls)
.fmap(urls => urls.map(url => // Resolve each style URL and transform to metadata
this._resolve(url).fmap(style => ({
style: normalizeTransformed(Config.transformStyle(style, url, dec)),
url,
node: null,
}))
))
// merge Maybe<StyleMetadata>[] to Maybe<StyleMetadata[]>
.bind(url_Ms => listToMaybe<StyleMetadata>(url_Ms))
);
}
private _resolve(url: string): Maybe<string> {
try {
return Maybe.lift(this._fileResolver.resolve(url));
} catch (e) {
logger.info('Cannot read file' + url);
return Maybe.nothing;
}
}
}