* Some WIP on file area releated stuff - various partially implemented pieces coming together

* Some changes to database.js: Triggers for FTS were not being created properly * Misc fixes & improvements
2016-09-28 21:54:25 -06:00
parent 7da0abdc39
commit 5a0b291a02
14 changed files with 675 additions and 21 deletions
--- a/core/file_entry.js
+++ b/core/file_entry.js
@@ -0,0 +1,171 @@
+/* jslint node: true */
+'use strict';
+
+const fileDb	= require('./database.js').dbs.file;
+const Errors	= require('./enig_error.js').Errors;
+
+//	deps
+const async		= require('async');
+const _			= require('lodash');
+
+const FILE_TABLE_MEMBERS	= [ 
+	'file_id', 'area_tag', 'file_sha1', 'file_name', 
+	'desc', 'desc_long', 'upload_by_username', 'upload_timestamp' 
+];
+
+module.exports = class FileEntry {
+	constructor(options) {
+		options			= options || {};
+
+		this.fileId		= options.fileId || 0;
+		this.areaTag	= options.areaTag || '';
+		this.meta		= {};
+		this.hashTags = new Set();
+	}
+
+	load(fileId, cb) {
+		const self = this;
+
+		async.series(
+			[
+				function loadBasicEntry(callback) {
+					fileDb.get(
+						`SELECT ${FILE_TABLE_MEMBERS.join(', ')}
+						FROM file
+						WHERE file_id=?
+						LIMIT 1;`,
+						[ fileId ],
+						(err, file) => {
+							if(err) {
+								return callback(err);
+							}
+
+							if(!file) {
+								return callback(Errors.DoesNotExist('No file is available by that ID'));
+							}
+
+							//	assign props from |file|
+							FILE_TABLE_MEMBERS.forEach(prop => {
+								self[_.camelCase(prop)] = file[prop];
+							});
+
+							return callback(null);
+						}
+					);
+				},
+				function loadMeta(callback) {
+					return self.loadMeta(callback);
+				},
+				function loadHashTags(callback) {
+					return self.loadHashTags(callback);
+				}
+			],
+			err => {
+				return cb(err);
+			}
+		);
+	}
+
+	loadMeta(cb) {
+		fileDb.each(
+			`SELECT meta_name, meta_value
+			FROM file_meta
+			WHERE file_id=?;`,
+			[ this.fileId ],
+			(err, meta) => {
+				if(meta) {
+					this.meta[meta.meta_name] = meta.meta_value;
+				}
+			},
+			err => {
+				return cb(err);
+			}
+		);
+	}
+
+	loadHashTags(cb) {
+		fileDb.each(
+			`SELECT ht.hash_tag_id, ht.hash_tag
+			FROM hash_tag ht
+			WHERE ht.hash_tag_id IN (
+				SELECT hash_tag_id
+				FROM file_hash_tag
+				WHERE file_id=?
+			);`,
+			[ this.fileId ],
+			(err, hashTag) => {
+				if(hashTag) {
+					this.hashTags.add(hashTag.hash_tag);
+				}
+			},
+			err => {
+				return cb(err);
+			}
+		);	
+	}
+
+	static findFiles(criteria, cb) {
+		//	:TODO: build search here - return [ fileid1, fileid2, ... ]
+		//	free form
+		//	areaTag
+		//	tags
+		//	order by
+		//	sort
+
+		let sql = 
+			`SELECT file_id
+			FROM file`;
+
+		let sqlWhere = '';
+
+		function appendWhereClause(clause) {
+			if(sqlWhere) {
+				sqlWhere += ' AND ';
+			} else {
+				sqlWhere += ' WHERE ';
+			}
+			sqlWhere += clause;
+		}
+
+		if(criteria.areaTag) {
+			appendWhereClause(`area_tag="${criteria.areaTag}"`);
+		}
+
+		if(criteria.search) {
+			appendWhereClause(
+				`file_id IN (
+					SELECT rowid
+					FROM file_fts
+					WHERE file_fts MATCH "${criteria.search.replace(/"/g,'""')}"
+				)`
+			);
+		}
+		
+		if(Array.isArray(criteria.hashTags)) {
+			appendWhereClause(
+				`file_id IN (
+					SELECT file_id
+					FROM file_hash_tag
+					WHERE hash_tag_id IN (
+						SELECT hash_tag_id
+						FROM hash_tag
+						WHERE hash_tag IN (${criteria.hashTags.join(',')})
+					)
+				)`
+			);
+		}
+
+		//	:TODO: criteria.orderBy
+		//	:TODO: criteria.sort
+
+		sql += sqlWhere + ';';
+		const matchingFileIds = [];
+		fileDb.each(sql, (err, fileId) => {
+			if(fileId) {
+				matchingFileIds.push(fileId.file_id);
+			}
+		}, err => {
+			return cb(err, matchingFileIds);
+		});
+	}
+};