cic-stack/apps/cic-meta/src/meta.ts

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import {ArgPair, Envelope, Syncable, MutablePgpKeyStore, PGPSigner} from "@cicnet/crdt-meta";
import {User} from "./user";
import {Phone} from "./phone";
import {Custom} from "./custom";
const fetch = require("node-fetch");
const headers = {
'Content-Type': 'application/json;charset=utf-8',
'x-cic-automerge': 'client'
};
const options = {
headers: headers,
};
class Meta {
keystore: MutablePgpKeyStore = new MutablePgpKeyStore();
signer: PGPSigner = new PGPSigner(this.keystore);
metaUrl: string;
private privateKey: string;
onload: (status: boolean) => void;
constructor(metaUrl: string, privateKey: any) {
this.metaUrl = metaUrl;
this.privateKey = privateKey;
this.keystore.loadKeyring().then(() => {
this.keystore.importPrivateKey(privateKey).then(() => this.onload(true));
});
}
async set(identifier: string, data: Object): Promise<any> {
let syncable: Syncable;
const response = await Meta.get(identifier, this.metaUrl);
if (response === `Request to ${this.metaUrl}/${identifier} failed. Connection error.`) {
return response;
} else if (typeof response !== "object" || typeof data !== "object") {
syncable = new Syncable(identifier, data);
const res = await this.updateMeta(syncable, identifier);
return `${res.status}: ${res.statusText}`;
} else {
syncable = await Meta.get(identifier, this.metaUrl);
let update: Array<ArgPair> = [];
for (const prop in data) {
update.push(new ArgPair(prop, data[prop]));
}
syncable.update(update, 'client-branch');
const res = await this.updateMeta(syncable, identifier);
return `${res.status}: ${res.statusText}`;
}
}
async updateMeta(syncable: Syncable, identifier: string): Promise<any> {
const envelope: Envelope = await this.wrap(syncable);
const reqBody: string = envelope.toJSON();
const putOptions = {
method: 'PUT',
headers: headers,
body: reqBody
};
return await fetch(`${this.metaUrl}/${identifier}`, putOptions).then(async response => {
if (response.ok) {
return Promise.resolve({
status: response.status,
statusText: response.statusText + ', Metadata updated successfully!'
});
} else {
return Promise.reject({
status: response.status,
statusText: response.statusText
});
}
});
}
static async get(identifier: string, metaUrl: string): Promise<any> {
const response = await fetch(`${metaUrl}/${identifier}`, options).then(response => {
if (response.ok) {
return (response.json());
} else {
return Promise.reject({
status: response.status,
statusText: response.statusText
});
}
}).catch(error => {
if (error.code === 'ECONNREFUSED') {
return `Request to ${metaUrl}/${identifier} failed. Connection error.`
}
return `${error.status}: ${error.statusText}`;
});
if (typeof response !== "object") {
return response;
}
return Envelope.fromJSON(JSON.stringify(response)).unwrap();
}
static async getIdentifier(name: string, type: string = 'custom'): Promise<string> {
let identifier: string;
type = type.toLowerCase();
if (type === 'user') {
identifier = await User.toKey(name);
} else if (type === 'phone') {
identifier = await Phone.toKey(name);
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} else if (type === 'custom') {
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identifier = await Custom.toKey(name);
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} else {
identifier = await Custom.toKey(name, type);
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}
return identifier;
}
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wrap(syncable: Syncable): Promise<Envelope> {
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return new Promise<Envelope>(async (resolve, reject) => {
syncable.setSigner(this.signer);
syncable.onwrap = async (env) => {
if (env === undefined) {
reject();
return;
}
resolve(env);
};
syncable.sign();
});
}
}
export {
Meta,
}