Refactoring
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								src/chart/drive.ts
									
									
									
									
									
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										122
									
								
								src/chart/drive.ts
									
									
									
									
									
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import autobind from 'autobind-decorator';
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import Chart, { Obj } from './';
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import DriveFile, { IDriveFile } from '../models/drive-file';
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import { isLocalUser } from '../models/user';
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/**
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 * ドライブに関するチャート
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 */
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type DriveLog = {
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	local: {
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		/**
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		 * 集計期間時点での、全ドライブファイル数
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		 */
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		totalCount: number;
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		/**
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		 * 集計期間時点での、全ドライブファイルの合計サイズ
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		 */
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		totalSize: number;
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		/**
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		 * 増加したドライブファイル数
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		 */
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		incCount: number;
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		/**
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		 * 増加したドライブ使用量
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		 */
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		incSize: number;
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		/**
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		 * 減少したドライブファイル数
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		 */
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		decCount: number;
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		/**
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		 * 減少したドライブ使用量
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		 */
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		decSize: number;
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	};
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	remote: DriveLog['local'];
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};
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class DriveChart extends Chart<DriveLog> {
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	constructor() {
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		super('drive');
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	}
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	@autobind
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	protected async getTemplate(init: boolean, latest?: DriveLog): Promise<DriveLog> {
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		const calcSize = (local: boolean) => DriveFile
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			.aggregate([{
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				$match: {
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					'metadata._user.host': local ? null : { $ne: null },
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					'metadata.deletedAt': { $exists: false }
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				}
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			}, {
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				$project: {
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					length: true
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				}
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			}, {
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				$group: {
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					_id: null,
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					usage: { $sum: '$length' }
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				}
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			}])
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			.then(res => res.length > 0 ? res[0].usage : 0);
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		const [localCount, remoteCount, localSize, remoteSize] = init ? await Promise.all([
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			DriveFile.count({ 'metadata._user.host': null }),
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			DriveFile.count({ 'metadata._user.host': { $ne: null } }),
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			calcSize(true),
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			calcSize(false)
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		]) : [
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			latest ? latest.local.totalCount : 0,
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			latest ? latest.remote.totalCount : 0,
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			latest ? latest.local.totalSize : 0,
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			latest ? latest.remote.totalSize : 0
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		];
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		return {
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			local: {
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				totalCount: localCount,
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				totalSize: localSize,
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				incCount: 0,
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				incSize: 0,
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				decCount: 0,
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				decSize: 0
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			},
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			remote: {
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				totalCount: remoteCount,
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				totalSize: remoteSize,
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				incCount: 0,
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				incSize: 0,
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				decCount: 0,
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				decSize: 0
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			}
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		};
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	}
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	@autobind
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	public async update(file: IDriveFile, isAdditional: boolean) {
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		const update: Obj = {};
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		update.totalCount = isAdditional ? 1 : -1;
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		update.totalSize = isAdditional ? file.length : -file.length;
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		if (isAdditional) {
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			update.incCount = 1;
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			update.incSize = file.length;
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		} else {
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			update.decCount = 1;
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			update.decSize = file.length;
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		}
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		await this.inc({
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			[isLocalUser(file.metadata._user) ? 'local' : 'remote']: update
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		});
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	}
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}
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export default new DriveChart();
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