import cronParser from "cron-parser";
import sampleEmit from "./test-event.mjs";
import includes from "lodash/includes.js";
import { v4 as uuid } from "uuid";
import { MY_DRIVE_VALUE } from "../../common/constants.mjs";
import changesToSpecificFiles from "../changes-to-specific-files-shared-drive/changes-to-specific-files-shared-drive.mjs";
export default {
...changesToSpecificFiles,
key: "google_drive-changes-to-specific-files",
name: "Changes to Specific Files",
description: "Watches for changes to specific files, emitting an event when a change is made to one of those files. To watch for changes to [shared drive](https://support.google.com/a/users/answer/9310351) files, use the **Changes to Specific Files (Shared Drive)** source instead.",
version: "0.2.4",
type: "source",
dedupe: "unique",
props: {
...changesToSpecificFiles.props,
drive: {
type: "string",
label: "Drive",
description: "Defaults to `My Drive`. To use a [Shared Drive](https://support.google.com/a/users/answer/9310351), use the **Changes to Specific Files (Shared Drive)** source instead.",
optional: true,
default: MY_DRIVE_VALUE,
},
updateTypes: {
propDefinition: [
changesToSpecificFiles.props.googleDrive,
"updateTypes",
],
},
},
hooks: {
...changesToSpecificFiles.hooks,
async activate() {
const channelID = uuid();
let subscriptions = this._getSubscriptions() || {};
const files = this.files;
for (const fileID of files) {
const {
expiration,
resourceId,
} = await this.googleDrive.activateFileHook(
channelID,
this.http.endpoint,
fileID,
);
subscriptions[resourceId] = {
expiration,
fileID,
};
}
this._setSubscriptions(subscriptions);
this._setChannelID(channelID);
},
async deactivate() {
const channelID = this._getChannelID();
if (!channelID) {
console.log(
"Channel not found, cannot stop notifications for non-existent channel",
);
return;
}
const subscriptions = this._getSubscriptions() || {};
for (const resourceId of Object.keys(subscriptions)) {
await this.googleDrive.stopNotifications(channelID, resourceId);
}
this._setSubscriptions({});
this._setChannelID(null);
},
},
methods: {
...changesToSpecificFiles.methods,
_getSubscriptions() {
return this.db.get("subscriptions") || {};
},
_setSubscriptions(subscriptions) {
this.db.set("subscriptions", subscriptions);
},
_getNextTimerEventTimestamp(event) {
if (event.cron) {
return cronParser
.parseExpression(event.cron)
.next()
.getTime();
}
if (event.interval_seconds) {
return Date.now() + event.interval_seconds * 1000;
}
},
async renewFileSubscriptions(event) {
const subscriptions = this._getSubscriptions() || {};
const channelID = this._getChannelID();
const newChannelID = uuid();
const nextRunTimestamp = this._getNextTimerEventTimestamp(event);
for (const [
currentResourceId,
metadata,
] of Object.entries(subscriptions)) {
const { fileID } = metadata;
const subscription = {
...metadata,
resourceId: currentResourceId,
};
const {
expiration,
resourceId,
} = await this.googleDrive.renewFileSubscription(
subscription,
this.http.endpoint,
channelID,
newChannelID,
fileID,
nextRunTimestamp,
);
subscriptions[resourceId] = {
expiration,
fileID,
};
}
this._setSubscriptions(subscriptions);
this._setChannelID(newChannelID);
},
},
async run(event) {
if (event.timestamp) {
return this.renewFileSubscriptions(event);
}
const channelID = this._getChannelID();
let subscriptions = this._getSubscriptions() || {};
const { headers } = event;
if (
!headers["x-goog-resource-state"] ||
!headers["x-goog-resource-id"] ||
!headers["x-goog-resource-uri"] ||
!headers["x-goog-message-number"]
) {
console.log("Request missing necessary headers: ", headers);
return;
}
const incomingChannelID = headers["x-goog-channel-id"];
if (incomingChannelID !== channelID) {
console.log(
`Channel ID of ${incomingChannelID} not equal to deployed component channel of ${channelID}`,
);
return;
}
if (subscriptions[headers["x-goog-resource-id"]] === undefined) {
console.log(
`Resource ID of ${headers["x-goog-resource-id"]} not currently being tracked. Exiting`,
);
return;
}
if (!includes(this.updateTypes, headers["x-goog-resource-state"])) {
console.log(
`Update type ${headers["x-goog-resource-state"]} not in list of updates to watch: `,
this.updateTypes,
);
return;
}
if (
!this.watchForPropertiesChanges &&
headers["x-goog-changed"] === "properties"
) {
console.log(
"Change to properties only, which this component is set to ignore. Exiting",
);
return;
}
const file = await this.googleDrive.getFileMetadata(
headers["x-goog-resource-uri"],
);
if (!file || !Object.keys(file).length) {
console.log("No file metadata returned, nothing to emit");
return;
}
const [
checkedFile,
] = this.checkMinimumInterval([
file,
]);
if (checkedFile) {
this.processChange(file, headers);
}
},
sampleEmit,
};