/*
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* Copyright 2012 ZXing authors
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#import "ZXGeoParsedResult.h"
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#import "ZXGeoResultParser.h"
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static NSRegularExpression *ZX_GEO_URL_PATTERN = nil;
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@implementation ZXGeoResultParser
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+ (void)initialize {
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if ([self class] != [ZXGeoResultParser class]) return;
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ZX_GEO_URL_PATTERN = [[NSRegularExpression alloc] initWithPattern:@"geo:([\\-0-9.]+),([\\-0-9.]+)(?:,([\\-0-9.]+))?(?:\\?(.*))?"
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options:NSRegularExpressionCaseInsensitive error:nil];
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}
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- (ZXParsedResult *)parse:(ZXResult *)result {
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NSString *rawText = [ZXResultParser massagedText:result];
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if (rawText == nil || (![rawText hasPrefix:@"geo:"] && ![rawText hasPrefix:@"GEO:"])) {
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return nil;
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}
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NSArray *matches = [ZX_GEO_URL_PATTERN matchesInString:rawText options:0 range:NSMakeRange(0, rawText.length)];
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if (matches.count == 0) {
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return nil;
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}
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NSTextCheckingResult *match = matches[0];
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NSString *query = nil;
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if ([match rangeAtIndex:4].location != NSNotFound) {
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query = [rawText substringWithRange:[match rangeAtIndex:4]];
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}
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double latitude = [[rawText substringWithRange:[match rangeAtIndex:1]] doubleValue];
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if (latitude > 90.0 || latitude < -90.0) {
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return nil;
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}
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double longitude = [[rawText substringWithRange:[match rangeAtIndex:2]] doubleValue];
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if (longitude > 180.0 || longitude < -180.0) {
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return nil;
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}
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double altitude;
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if ([match rangeAtIndex:3].location == NSNotFound) {
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altitude = 0.0;
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} else {
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altitude = [[rawText substringWithRange:[match rangeAtIndex:3]] doubleValue];
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if (altitude < 0.0) {
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return nil;
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}
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}
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return [ZXGeoParsedResult geoParsedResultWithLatitude:latitude longitude:longitude altitude:altitude query:query];
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}
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@end
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