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MLFullTextDBAdapter.m
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MLFullTextDBAdapter.m
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/*
Copyright (c) 2017 Max Lungarella <cybrmx@gmail.com>
Created on 20/04/2017.
This file is part of AmiKo for OSX.
AmiKo for OSX is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
------------------------------------------------------------------------ */
#import "MLFullTextDBAdapter.h"
#import "MLFullTextEntry.h"
#import "MLSQLiteDatabase.h"
#import "MLUtilities.h"
enum {
kRowId = 0, kKeyword, kRegnrs
};
static NSString *KEY_ROWID = @"id";
static NSString *KEY_KEYWORD = @"keyword";
static NSString *KEY_REGNR = @"regnr";
static NSString *DATABASE_TABLE = @"frequency";
@implementation MLFullTextDBAdapter
{
// Instance variable declarations go here
MLSQLiteDatabase *myFullTextDb;
}
/** Instance functions
*/
#pragma mark - public methods
- (BOOL) openDatabase:(NSString *)dbName
{
// A. Check first users documents folder
NSFileManager *fileManager = [NSFileManager defaultManager];
// Get documents directory
NSString *documentsDir = [MLUtilities documentsDirectory];
NSString *filePath = [[documentsDir stringByAppendingPathComponent:dbName] stringByAppendingPathExtension:@"db"];
// Check if database exists
if (filePath!=nil) {
if ([fileManager fileExistsAtPath:filePath]) {
NSLog(@"Fulltext DB found documents folder - %@", filePath);
myFullTextDb = [[MLSQLiteDatabase alloc] initReadOnlyWithPath:filePath];
return true;
}
}
// B. If no database is available, check if db is in app bundle
filePath = [[NSBundle mainBundle] pathForResource:dbName ofType:@"db"];
if (filePath!=nil ) {
myFullTextDb = [[MLSQLiteDatabase alloc] initReadOnlyWithPath:filePath];
NSLog(@"Fulltext DB found in app bundle - %@", filePath);
return true;
}
return false;
}
- (void) closeDatabase
{
if (myFullTextDb)
[myFullTextDb close];
}
- (NSInteger) getNumRecords
{
return [myFullTextDb numberRecordsForTable:DATABASE_TABLE];
}
/** Get full text from hash
*/
- (MLFullTextEntry *) searchHash:(NSString *)hash
{
NSString *query = [NSString stringWithFormat:@"select * from %@ where %@ like '%@'", DATABASE_TABLE, KEY_ROWID, hash];
NSArray *results = [myFullTextDb performQuery:query];
return [self cursorToFullTextEntry:[results firstObject]];
}
/** Search fulltext containing keyword
*/
- (NSArray *) searchKeyword:(NSString *)keyword
{
NSString *query = [NSString stringWithFormat:@"select * from %@ where %@ like '%@%%'", DATABASE_TABLE, KEY_KEYWORD, keyword];
NSArray *results = [myFullTextDb performQuery:query];
return [self extractFullTextEntryFrom:results];
}
- (MLFullTextEntry *) cursorToFullTextEntry:(NSArray *)cursor
{
MLFullTextEntry *entry = [[MLFullTextEntry alloc] init];
[entry setHash:(NSString *)[cursor objectAtIndex:kRowId]];
[entry setKeyword:(NSString *)[cursor objectAtIndex:kKeyword]];
NSString *regnrsAndChapters = (NSString *)[cursor objectAtIndex:kRegnrs];
if (regnrsAndChapters!=nil) {
NSMutableDictionary *dict = [self regChapterDict:regnrsAndChapters];
[entry setRegChaptersDict:dict];
}
[entry setRegnrs:regnrsAndChapters];
return entry;
}
- (NSArray *) extractFullTextEntryFrom:(NSArray *)results
{
NSMutableArray *entryList = [NSMutableArray array];
for (NSArray *cursor in results) {
assert(cursor!=nil);
MLFullTextEntry *entry = [[MLFullTextEntry alloc] init];
[entry setHash:(NSString *)[cursor objectAtIndex:kRowId]];
[entry setKeyword:(NSString *)[cursor objectAtIndex:kKeyword]];
NSString *regnrsAndChapters = (NSString *)[cursor objectAtIndex:kRegnrs];
if (regnrsAndChapters!=nil) {
NSMutableDictionary *dict = [self regChapterDict:regnrsAndChapters];
[entry setRegChaptersDict:dict];
}
[entry setRegnrs:regnrsAndChapters];
[entryList addObject:entry];
}
return entryList;
}
- (NSMutableDictionary *) regChapterDict:(NSString *)regChapterStr
{
NSMutableString *regnr = [[NSMutableString alloc] init];
NSMutableString *chapters = [[NSMutableString alloc] init];
NSMutableDictionary *dict = [[NSMutableDictionary alloc] init]; // regnr -> set of chapters
// Format: 65000(13)|65001(14)|...
NSArray *rac = [regChapterStr componentsSeparatedByString:@"|"];
NSMutableSet *set = [NSMutableSet setWithArray:rac];
// Loop through all regnr-chapter pairs
for (NSString *r in set) {
// Extract chapters located between parentheses
NSArray *str1 = [r componentsSeparatedByString:@"("];
if (str1!=nil) {
regnr = [str1 objectAtIndex:0];
if ([str1 count]>1) {
NSArray *str2 = [[str1 objectAtIndex:1] componentsSeparatedByString:@")"];
chapters = [str2 objectAtIndex:0];
}
NSMutableSet *chaptersSet = [[NSMutableSet alloc] init];
if ([dict objectForKey:regnr]!=nil) {
chaptersSet = [dict objectForKey:regnr];
}
// Split chapters listed as comma-separated string
NSArray *c = [chapters componentsSeparatedByString:@","];
for (NSString *chapter in c) {
[chaptersSet addObject:chapter];
}
// Update dictionary
dict[regnr] = chaptersSet;
} else {
// No chapters for this regnr -> do nothing
}
}
return dict;
}
@end