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
|
import { Key } from "../fields/Key";
import { ObservableMap, action, reaction, runInAction } from "mobx";
import { Field, FieldWaiting, FIELD_WAITING, Opt, FieldId } from "../fields/Field";
import { Document } from "../fields/Document";
import { SocketStub, FieldMap } from "./SocketStub";
import * as OpenSocket from 'socket.io-client';
import { Utils, emptyFunction } from "./../Utils";
import { MessageStore, Types } from "./../server/Message";
export class Server {
public static ClientFieldsCached: ObservableMap<FieldId, Field | FIELD_WAITING> = new ObservableMap();
static Socket: SocketIOClient.Socket = OpenSocket(`${window.location.protocol}//${window.location.hostname}:4321`);
static GUID: string = Utils.GenerateGuid();
// Retrieves the cached value of the field and sends a request to the server for the real value (if it's not cached).
// Call this is from within a reaction and test whether the return value is FieldWaiting.
public static GetField(fieldid: FieldId): Promise<Opt<Field>>;
public static GetField(fieldid: FieldId, callback: (field: Opt<Field>) => void): void;
public static GetField(fieldid: FieldId, callback?: (field: Opt<Field>) => void): Promise<Opt<Field>> | void {
let fn = (cb: (field: Opt<Field>) => void) => {
let cached = this.ClientFieldsCached.get(fieldid);
if (cached === undefined) {
this.ClientFieldsCached.set(fieldid, FieldWaiting);
SocketStub.SEND_FIELD_REQUEST(fieldid, action((field: Field | undefined) => {
let cached = this.ClientFieldsCached.get(fieldid);
if (cached !== FieldWaiting) {
cb(cached);
}
else {
if (field) {
this.ClientFieldsCached.set(fieldid, field);
} else {
this.ClientFieldsCached.delete(fieldid);
}
cb(field);
}
}));
} else if (cached !== FieldWaiting) {
setTimeout(() => cb(cached as Field), 0);
} else {
reaction(() => this.ClientFieldsCached.get(fieldid),
(field, reaction) => {
if (field !== FieldWaiting) {
reaction.dispose();
cb(field);
}
});
}
};
if (callback) {
fn(callback);
} else {
return new Promise(fn);
}
}
public static GetFields(fieldIds: FieldId[]): Promise<{ [id: string]: Field }>;
public static GetFields(fieldIds: FieldId[], callback: (fields: FieldMap) => any): void;
public static GetFields(fieldIds: FieldId[], callback?: (fields: FieldMap) => any): Promise<FieldMap> | void {
let fn = action((cb: (fields: FieldMap) => void) => {
let neededFieldIds: FieldId[] = [];
let waitingFieldIds: FieldId[] = [];
let existingFields: FieldMap = {};
for (let id of fieldIds) {
let field = this.ClientFieldsCached.get(id);
if (field === undefined) {
neededFieldIds.push(id);
this.ClientFieldsCached.set(id, FieldWaiting);
} else if (field === FieldWaiting) {
waitingFieldIds.push(id);
} else {
existingFields[id] = field;
}
}
SocketStub.SEND_FIELDS_REQUEST(neededFieldIds, action((fields: FieldMap) => {
for (let id of neededFieldIds) {
let field = fields[id];
if (field) {
if (this.ClientFieldsCached.get(field.Id) === FieldWaiting) {
this.ClientFieldsCached.set(field.Id, field);
} else {
throw new Error("we shouldn't be trying to replace things that are already in the cache");
}
} else {
if (this.ClientFieldsCached.get(id) === FieldWaiting) {
this.ClientFieldsCached.delete(id);
} else {
throw new Error("we shouldn't be trying to replace things that are already in the cache");
}
}
}
reaction(() => waitingFieldIds.map(id => this.ClientFieldsCached.get(id)),
(cachedFields, reaction) => {
if (!cachedFields.some(field => field === FieldWaiting)) {
const realFields = cachedFields as Opt<Field>[];
reaction.dispose();
waitingFieldIds.forEach((id, index) => {
existingFields[id] = realFields[index];
});
cb({ ...fields, ...existingFields });
}
}, { fireImmediately: true });
}));
});
if (callback) {
fn(callback);
} else {
return new Promise(fn);
}
}
public static GetDocumentField(doc: Document, key: Key, callback?: (field: Field) => void) {
let field = doc._proxies.get(key.Id);
if (field) {
this.GetField(field,
action((fieldfromserver: Opt<Field>) => {
if (fieldfromserver) {
doc.fields.set(key.Id, { key, field: fieldfromserver });
if (callback) {
callback(fieldfromserver);
}
}
}));
}
}
public static DeleteDocumentField(doc: Document, key: Key) {
SocketStub.SEND_DELETE_DOCUMENT_FIELD(doc, key);
}
public static UpdateField(field: Field) {
if (!this.ClientFieldsCached.has(field.Id)) {
this.ClientFieldsCached.set(field.Id, field);
}
SocketStub.SEND_SET_FIELD(field);
}
static connected(message: string) {
Server.Socket.emit(MessageStore.Bar.Message, Server.GUID);
}
@action
private static cacheField(clientField: Field) {
var cached = this.ClientFieldsCached.get(clientField.Id);
if (!cached) {
this.ClientFieldsCached.set(clientField.Id, clientField);
} else {
// probably should overwrite the values within any field that was already here...
}
return this.ClientFieldsCached.get(clientField.Id);
}
@action
static updateField(field: { id: string, data: any, type: Types }) {
if (Server.ClientFieldsCached.has(field.id)) {
var f = Server.ClientFieldsCached.get(field.id);
if (f) {
// console.log("Applying : " + field.id);
f.UpdateFromServer(field.data);
f.init(emptyFunction);
} else {
// console.log("Not applying wa : " + field.id);
}
} else {
// console.log("Not applying mi : " + field.id);
}
}
}
Utils.AddServerHandler(Server.Socket, MessageStore.Foo, Server.connected);
Utils.AddServerHandler(Server.Socket, MessageStore.SetField, Server.updateField);
|
