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
|
import { action, computed, observable, runInAction } from 'mobx';
import { primitive, serializable } from 'serializr';
import { DocServer } from '../client/DocServer';
import { scriptingGlobal } from '../client/util/ScriptingGlobals';
import { Deserializable } from '../client/util/SerializationHelper';
import { Doc, Field, FieldWaiting, Opt } from './Doc';
import { Copy, Id, ToJavascriptString, ToScriptString, ToString, ToValue } from './FieldSymbols';
import { ObjectField } from './ObjectField';
type serializedProxyType = { cache: { field: unknown; p: undefined | Promise<unknown> }; fieldId: string };
function deserializeProxy(field: serializedProxyType) {
if (!field.cache.field) {
field.cache = { field: DocServer.GetCachedRefField(field.fieldId), p: undefined };
}
}
@Deserializable('proxy', (obj: unknown) => deserializeProxy(obj as serializedProxyType))
export class ProxyField<T extends Doc> extends ObjectField {
constructor();
constructor(value: T);
constructor(fieldId: string);
constructor(value?: T | string) {
super();
if (typeof value === 'string') {
// this.cache = DocServer.GetCachedRefField(value) as any;
this.fieldId = value;
} else if (value) {
this.cache = { field: value, p: undefined };
this.fieldId = value[Id];
}
}
[ToValue](/* doc: any */) {
return ProxyField.toValue(this);
}
[Copy]() {
if (this.cache.field) return new ProxyField<T>(this.cache.field);
return new ProxyField<T>(this.fieldId);
}
[ToJavascriptString]() {
return Field.toScriptString(this[ToValue]()?.value as T);
}
[ToScriptString]() {
return Field.toScriptString(this[ToValue]()?.value as T); // not sure this is quite right since it doesn't recreate a proxy field, but better than 'invalid' ?
}
[ToString]() {
return Field.toString(this[ToValue]()?.value);
}
@serializable(primitive())
readonly fieldId: string = '';
// This getter/setter and nested object thing is
// because mobx doesn't play well with observable proxies
@observable.ref
private _cache: { readonly field: T | undefined; p: FieldWaiting<T> | undefined } = { field: undefined, p: undefined };
private get cache(): { field: T | undefined; p: FieldWaiting<T> | undefined } {
return this._cache;
}
private set cache(val: { field: T | undefined; p: FieldWaiting<T> | undefined }) {
runInAction(() => {
this._cache = { ...val };
});
}
private failed = false;
@computed get value(): T | undefined | FieldWaiting<T> {
if (this.cache.field) return this.cache.field;
if (this.failed) return undefined;
this.cache.field = DocServer.GetCachedRefField(this.fieldId) as T;
if (!this.cache.field && !this.cache.p) {
this.cache = {
field: undefined,
p: DocServer.GetRefField(this.fieldId).then(val => this.setValue(val as T)) as FieldWaiting<T>,
};
}
return this.cache.field ?? this.cache.p;
}
@computed get needsRequesting(): boolean {
return !!(!this.cache.field && !this.failed && !this._cache.p && !DocServer.GetCachedRefField(this.fieldId));
}
setExternalValuePromise(externalValuePromise: Promise<unknown>) {
this.cache.p = externalValuePromise.then(() => this.value) as FieldWaiting<T>;
}
@action
setValue(field: Opt<T>) {
this.cache = { field, p: undefined };
this.failed = field === undefined;
return field;
}
}
// eslint-disable-next-line no-redeclare, @typescript-eslint/no-namespace
export namespace ProxyField {
let useProxy = true;
export function DisableProxyFields() {
useProxy = false;
}
export function EnableProxyFields() {
useProxy = true;
}
export function WithoutProxy<T>(fn: () => T) {
DisableProxyFields();
try {
return fn();
} finally {
EnableProxyFields();
}
}
export function toValue(value: { value: unknown }) {
if (useProxy) {
return { value: value.value };
}
return undefined;
}
}
// eslint-disable-next-line no-use-before-define
function prefetchValue(proxy: PrefetchProxy<Doc>) {
return proxy.value as Promise<Doc>;
}
@scriptingGlobal
@Deserializable('prefetch_proxy', (obj:unknown) => prefetchValue(obj as PrefetchProxy<Doc>))
export class PrefetchProxy<T extends Doc> extends ProxyField<T> {}
|
