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| 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 | 6x 6x 6x 6x 6x 23x 23x 23x 23x 23x 6x 3x 3x 3x 3x 3x 6x 17x 17x 17x 17x 17x 17x 6x 3x 6x 3x 3x 3x 3x 3x 3x 1x 1x 1x 2x 1x 1x 1x 1x 1x 2x 2x 7x 4x 4x 4x 4x 3x 2x 6x | import {randomUUID} from "crypto";
import Debug from 'debug';
import microtime from 'microtime';
import {PeerAddress} from "./peers";
import {CreatorID, DomainEntityID, HostID, PropertyID, Timestamp, TransactionID} from "./types";
const debug = Debug('rz:delta');
export type DeltaID = string;
export type PointerTarget = string | number | null;
type PointerV1 = {
localContext: string;
target: PointerTarget;
targetContext?: string;
};
export type Scalar = string | number | null;
export type Reference = {
[key: DomainEntityID]: PropertyID
};
export type PointersV2 = {
[key: PropertyID]: Scalar | Reference
};
export class DeltaNetworkImageV1 {
id: DeltaID;
timeCreated: Timestamp;
host: HostID;
creator: CreatorID;
pointers: PointerV1[];
constructor({id, timeCreated, host, creator, pointers}: DeltaNetworkImageV1) {
this.id = id;
this.host = host;
this.creator = creator;
this.timeCreated = timeCreated;
this.pointers = pointers;
}
};
export class DeltaNetworkImageV2 {
id: DeltaID;
timeCreated: Timestamp;
host: HostID;
creator: CreatorID;
pointers: PointersV2;
constructor({id, timeCreated, host, creator, pointers}: DeltaNetworkImageV2) {
this.id = id;
this.host = host;
this.creator = creator;
this.timeCreated = timeCreated;
this.pointers = pointers;
}
};
export class DeltaV1 extends DeltaNetworkImageV1 {
receivedFrom?: PeerAddress;
timeReceived: Timestamp;
transactionId?: TransactionID;
constructor({id, timeCreated, host, creator, pointers}: Partial<DeltaNetworkImageV1>) {
id = id ?? randomUUID();
timeCreated = timeCreated ?? microtime.now();
Iif (!host || !creator || !pointers) throw new Error('uninitializied values');
super({id, timeCreated, host, creator, pointers});
this.timeCreated = timeCreated;
this.timeReceived = this.timeCreated;
}
toNetworkImage() {
return new DeltaNetworkImageV1(this);
}
static fromNetworkImage(delta: DeltaNetworkImageV1) {
return new DeltaV1(delta);
}
}
export class DeltaV2 extends DeltaNetworkImageV2 {
receivedFrom?: PeerAddress;
timeReceived: Timestamp;
transactionId?: TransactionID;
constructor({id, timeCreated, host, creator, pointers}: Partial<DeltaNetworkImageV2>) {
id = id ?? randomUUID();
timeCreated = timeCreated ?? microtime.now();
Iif (!host || !creator || !pointers) throw new Error('uninitializied values');
super({id, timeCreated, host, creator, pointers});
this.timeCreated = timeCreated;
this.timeReceived = this.timeCreated;
}
toNetworkImage() {
return new DeltaNetworkImageV2(this);
}
static fromNetworkImage(delta: DeltaNetworkImageV2) {
return new DeltaV2(delta);
}
static fromV1(delta: DeltaV1) {
const pointersV2: PointersV2 = {};
for (const {localContext, target, targetContext} of delta.pointers) {
if (targetContext && typeof target === "string") {
pointersV2[localContext] = {[target]: targetContext};
} else {
pointersV2[localContext] = target;
}
}
debug(`fromV1, pointers in: ${JSON.stringify(delta.pointers)}`);
debug(`fromV1, pointers out: ${JSON.stringify(pointersV2)}`);
return DeltaV2.fromNetworkImage({
...delta,
pointers: pointersV2
});
}
toV1() {
const pointersV1: PointerV1[] = [];
for (const [localContext, pointerTarget] of Object.entries(this.pointers)) {
if (pointerTarget && typeof pointerTarget === "object") {
const [obj] = Object.entries(pointerTarget)
Iif (!obj) throw new Error("invalid pointer target");
const [target, targetContext] = Object.entries(pointerTarget)[0];
pointersV1.push({localContext, target, targetContext});
} else {
pointersV1.push({localContext, target: pointerTarget});
}
}
return new DeltaV1({
...this,
pointers: pointersV1
});
}
}
// Alias
export class Delta extends DeltaV1 {}
export type DeltaFilter = (delta: Delta) => boolean;
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