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//
// Import.m
// Vienna
//
// Created by Steve on 5/27/05.
// Copyright (c) 2004-2005 Steve Palmer. All rights reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
//
#import "Import.h"
#import "XMLParser.h"
#import "StringExtensions.h"
#import "ViennaApp.h"
@implementation AppController (Import)
/* importSubscriptions
* Import an OPML file which lists RSS feeds.
*/
-(IBAction)importSubscriptions:(id)sender
{
NSOpenPanel * panel = [NSOpenPanel openPanel];
[panel beginSheetForDirectory:nil
file:nil
types:nil
modalForWindow:mainWindow
modalDelegate:self
didEndSelector:@selector(importOpenPanelDidEnd:returnCode:contextInfo:)
contextInfo:nil];
}
/* importOpenPanelDidEnd
* Called when the user completes the Import open panel
*/
-(void)importOpenPanelDidEnd:(NSOpenPanel *)panel returnCode:(int)returnCode contextInfo:(void *)contextInfo
{
if (returnCode == NSOKButton)
{
[panel orderOut:self];
[self importFromFile:[panel filename]];
}
}
/* importSubscriptionGroup
* Import one group of an OPML subscription tree.
*/
-(int)importSubscriptionGroup:(XMLParser *)tree underParent:(int)parentId
{
int countImported = 0;
int count = [tree countOfChildren];
int index;
for (index = 0; index < count; ++index)
{
XMLParser * outlineItem = [tree treeByIndex:index];
NSDictionary * entry = [outlineItem attributesForTree];
NSString * feedTitle = [[entry objectForKey:@"title"] stringByUnescapingExtendedCharacters];
NSString * feedDescription = [[entry objectForKey:@"description"] stringByUnescapingExtendedCharacters];
NSString * feedURL = [[entry objectForKey:@"xmlurl"] stringByUnescapingExtendedCharacters];
NSString * feedHomePage = [[entry objectForKey:@"htmlurl"] stringByUnescapingExtendedCharacters];
// Some OPML exports use 'text' instead of 'title'.
if (feedTitle == nil || [feedTitle length] == 0u)
{
NSString * feedText = [[entry objectForKey:@"text"] stringByUnescapingExtendedCharacters];
if (feedText != nil)
feedTitle = feedText;
}
// Do double-decoding of the title to get around a bug in some commercial newsreaders
// where they double-encode characters
feedTitle = [feedTitle stringByUnescapingExtendedCharacters];
if (feedURL == nil)
{
// This is a new group so try to create it. If there's an error then default to adding
// the sub-group items under the parent.
if (feedTitle != nil)
{
int folderId = [db addFolder:parentId afterChild:-1 folderName:feedTitle type:MA_Group_Folder canAppendIndex:NO];
if (folderId == -1)
folderId = MA_Root_Folder;
countImported += [self importSubscriptionGroup:outlineItem underParent:folderId];
}
}
else if (feedTitle != nil)
{
Folder * folder;
int folderId;
if ((folder = [db folderFromFeedURL:feedURL]) != nil)
folderId = [folder itemId];
else
{
folderId = [db addRSSFolder:feedTitle underParent:parentId afterChild:-1 subscriptionURL:feedURL];
++countImported;
}
if (feedDescription != nil)
[db setFolderDescription:folderId newDescription:feedDescription];
if (feedHomePage != nil)
[db setFolderHomePage:folderId newHomePage:feedHomePage];
}
}
return countImported;
}
/* importFromFile
* Import a list of RSS subscriptions.
*/
-(void)importFromFile:(NSString *)importFileName
{
NSData * data = [NSData dataWithContentsOfFile:[importFileName stringByExpandingTildeInPath]];
BOOL hasError = NO;
int countImported = 0;
if (data != nil)
{
XMLParser * tree = [[XMLParser alloc] init];
if (![tree setData:data])
{
NSRunAlertPanel(NSLocalizedString(@"Error importing subscriptions title", nil),
NSLocalizedString(@"Error importing subscriptions body", nil),
NSLocalizedString(@"OK", nil), nil, nil);
hasError = YES;
}
else
{
XMLParser * bodyTree = [tree treeByPath:@"opml/body"];
[db beginTransaction];
countImported = [self importSubscriptionGroup:bodyTree underParent:MA_Root_Folder];
[db commitTransaction];
}
[tree release];
}
// Announce how many we successfully imported
if (!hasError)
{
NSRunAlertPanel(NSLocalizedString(@"RSS Subscription Import Title", nil), NSLocalizedString(@"%d subscriptions successfully imported", nil), NSLocalizedString(@"OK", nil), nil, nil, countImported);
}
}
@end
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