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//  ASIPithosAccountRequest.m

//  Based on ASICloudFilesContainerRequest.m

//

// Copyright 2011 GRNET S.A. All rights reserved.

//

// Redistribution and use in source and binary forms, with or

// without modification, are permitted provided that the following

// conditions are met:

// 

//   1. Redistributions of source code must retain the above

//      copyright notice, this list of conditions and the following

//      disclaimer.

// 

//   2. Redistributions in binary form must reproduce the above

//      copyright notice, this list of conditions and the following

//      disclaimer in the documentation and/or other materials

//      provided with the distribution.

// 

// THIS SOFTWARE IS PROVIDED BY GRNET S.A. ``AS IS'' AND ANY EXPRESS

// OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED

// WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR

// PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL GRNET S.A OR

// CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,

// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT

// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF

// USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED

// AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT

// LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN

// ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE

// POSSIBILITY OF SUCH DAMAGE.

// 

// The views and conclusions contained in the software and

// documentation are those of the authors and should not be

// interpreted as representing official policies, either expressed

// or implied, of GRNET S.A.

#import "ASIPithosAccountRequest.h"

#import "ASIPithosContainer.h"

@implementation ASIPithosAccountRequest

@synthesize currentContainer;

#pragma mark -

#pragma mark Constructors

+ (id)storageRequestWithMethod:(NSString *)method queryString:(NSString *)queryString {

    NSString *urlString = [NSString stringWithString:[self storageURL]];

    if (queryString)

        urlString = [urlString stringByAppendingString:queryString];

	ASIPithosAccountRequest *request = [[[self alloc] initWithURL:[NSURL URLWithString:urlString]] autorelease];

	[request setRequestMethod:method];

	[request addRequestHeader:@"X-Auth-Token" value:[self authToken]];

	return request;

}

+ (id)storageRequestWithMethod:(NSString *)method {

	return [self storageRequestWithMethod:method queryString:nil];

}

#pragma mark -

#pragma mark Memory Management

- (void)dealloc {

	[currentContainer release];

    [containers release];

    [metadata release];

    [groups release];

	[super dealloc];

}

#pragma mark -

#pragma mark HEAD

// HEAD storageURL

+ (id)accountMetadataRequest {

	return [self storageRequestWithMethod:@"HEAD"];

}

// HEAD storageURL?[until=untilTimestamp]

+ (id)accountMetadataRequestUntil:(NSDate *)untilTimestamp {

    NSString *queryString = nil;

    if (untilTimestamp)

        queryString = [NSString stringWithFormat:@"?until=%d", (int)[untilTimestamp timeIntervalSince1970]];

	return [self storageRequestWithMethod:@"HEAD" queryString:queryString];

}

// HEAD storageURL?[until=untilTimestamp] [If-Modified-Since]

+ (id)accountMetadataRequestUntil:(NSDate *)untilTimestamp ifModifiedSince:(NSDate *)sinceTimestamp {

    ASIPithosAccountRequest *request = [self accountMetadataRequestUntil:untilTimestamp];

    [request addRequestIfModifiedSinceHeader:sinceTimestamp];

    return request;

}

// HEAD storageURL?[until=untilTimestamp] [If-Unmodified-Since]

+ (id)accountMetadataRequestUntil:(NSDate *)untilTimestamp ifUnmodifiedSince:(NSDate *)sinceTimestamp {

    ASIPithosAccountRequest *request = [self accountMetadataRequestUntil:untilTimestamp];

    [request addRequestIfUnmodifiedSinceHeader:sinceTimestamp];

    return request;

}

- (NSUInteger)containerCount {

	return [[[self responseHeaders] objectForKey:@"X-Account-Container-Count"] intValue];

}

- (NSUInteger)bytesUsed {

	return [[[self responseHeaders] objectForKey:@"X-Account-Bytes-Used"] intValue];

}

- (NSDate *)untilTimestamp {

    NSString *untilTimestampString = [[self responseHeaders] objectForKey:@"X-Account-Until-Timestamp"];

    if (untilTimestampString)

        return [[self dateFormatterWithFormatId:1] dateFromString:untilTimestampString];

    return nil;

}

- (NSDictionary *)groups {

    if (groups == nil) {

        groups = [self getHeadersDictionaryForPrefix:@"X-Account-Group-"];

        [groups retain];

    }

    return groups;

}

- (NSDictionary *)metadata {

    if (metadata == nil) {

        metadata = [self getHeadersDictionaryForPrefix:@"X-Account-Meta-"];

        [metadata retain];

    }

    return metadata;

}

- (NSDate *)lastModified {

    NSString *lastModifiedString = [[self responseHeaders] objectForKey:@"Last-Modified"];

    if (lastModifiedString)

        return [[self dateFormatterWithFormatId:1] dateFromString:lastModifiedString];

    return nil;

}

#pragma mark -

#pragma mark GET

// GET storageURL

+ (id)listContainersRequest {

	return [self storageRequestWithMethod:@"GET" queryString:@"?format=xml"];

}

// GET storageURL?[limit=limit]&[marker=marker]&[shared=]&[until=untilTimestamp]

+ (id)listContainersRequestWithLimit:(NSUInteger)limit 

                              marker:(NSString *)marker 

                              shared:(BOOL)shared 

                               until:(NSDate *)untilTimestamp {

	NSString *queryString = @"?format=xml";

	if (limit && (limit > 0))

		queryString = [queryString stringByAppendingString:[NSString stringWithFormat:@"&limit=%lu", limit]];

	if (marker)

		queryString = [queryString stringByAppendingString:[NSString stringWithFormat:@"&marker=%@", [marker stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding]]];

	if (shared)

		queryString = [queryString stringByAppendingString:@"&shared="];    

    if (untilTimestamp)

        queryString = [queryString stringByAppendingString:[NSString stringWithFormat:@"&until=%d", (int)[untilTimestamp timeIntervalSince1970]]];

	return [self storageRequestWithMethod:@"GET" queryString:queryString];

}

// GET storageURL?[limit=limit]&[marker=marker]&[shared=]&[until=untilTimestamp] [If-Modified-Since]

+ (id)listContainersRequestWithLimit:(NSUInteger)limit 

                              marker:(NSString *)marker 

                              shared:(BOOL)shared 

                               until:(NSDate *)untilTimestamp 

                     ifModifiedSince:(NSDate *)sinceTimestamp {

    ASIPithosAccountRequest *request = [self listContainersRequestWithLimit:limit marker:marker shared:shared until:untilTimestamp];

    [request addRequestIfModifiedSinceHeader:sinceTimestamp];

    return request;

}

// GET storageURL?[limit=limit]&[marker=marker]&[shared=]&[until=untilTimestamp] [If-Unmodified-Since]

+ (id)listContainersRequestWithLimit:(NSUInteger)limit 

                              marker:(NSString *)marker 

                              shared:(BOOL)shared 

                               until:(NSDate *)untilTimestamp 

                     ifUnmodifiedSince:(NSDate *)sinceTimestamp {

    ASIPithosAccountRequest *request = [self listContainersRequestWithLimit:limit marker:marker shared:shared until:untilTimestamp];

    [request addRequestIfUnmodifiedSinceHeader:sinceTimestamp];

    return request;

}

- (NSArray *)containers {

    if (containers == nil) {

        containers = [[NSMutableArray alloc] init];

        NSXMLParser *parser = [[[NSXMLParser alloc] initWithData:[self responseData]] autorelease];

        [parser setDelegate:self];

        [parser setShouldProcessNamespaces:NO];

        [parser setShouldReportNamespacePrefixes:NO];

        [parser setShouldResolveExternalEntities:NO];

        [parser parse];

    }    

	return containers;

}

#pragma mark -

#pragma mark POST

// POST storageURL

+ (id)updateAccountMetadataRequest {

    return [self storageRequestWithMethod:@"POST"];

}

// POST storageURL?[update=] [X-Account-Group-*] [X-Account-Meta-*]

+ (id)updateAccountMetadataRequestWithGroups:(NSDictionary *)groups metadata:(NSDictionary *)metadata update:(BOOL)update {

    NSString *queryString = nil;

    if (update)

        queryString = @"?update=";

    ASIPithosAccountRequest *request = [self storageRequestWithMethod:@"POST" queryString:queryString];

    if (groups) {

        for (NSString *key in [groups keyEnumerator]) {

            [request addRequestHeader:[NSString stringWithFormat:@"X-Account-Group-%@", key] value:[groups objectForKey:key]];

        }

    }

    if (metadata) {

        for (NSString *key in [metadata keyEnumerator]) {

            [request addRequestHeader:[NSString stringWithFormat:@"X-Account-Meta-%@", key] value:[metadata objectForKey:key]];

        }

    }

	return request;

}

#pragma mark -

#pragma mark NSXMLParserDelegate

- (void)parser:(NSXMLParser *)parser didStartElement:(NSString *)elementName namespaceURI:(NSString *)namespaceURI qualifiedName:(NSString *)qName attributes:(NSDictionary *)attributeDict {

    self.currentElement = elementName;

	if ([elementName isEqualToString:@"container"]) {

		self.currentContainer = [ASIPithosContainer container];

	}

	self.currentContent = @"";

}

- (void)parser:(NSXMLParser *)parser didEndElement:(NSString *)elementName namespaceURI:(NSString *)namespaceURI qualifiedName:(NSString *)qName {

	if ([elementName isEqualToString:@"name"]) {

        currentContainer.name = currentContent;

	} else if ([elementName isEqualToString:@"count"]) {

        currentContainer.count = [currentContent intValue];

	} else if ([elementName isEqualToString:@"bytes"]) {

        currentContainer.bytes = [currentContent intValue];

    } else if ([elementName isEqualToString:@"last_modified"]) {

        currentContainer.lastModified = [[self dateFormatterWithFormatId:0] dateFromString:

                                         [currentContent stringByReplacingOccurrencesOfString:@":" 

                                                                                   withString:@"" 

                                                                                      options:NSBackwardsSearch 

                                                                                        range:NSMakeRange(([currentContent length] - 3), 1)]];

    } else if ([elementName isEqualToString:@"x_container_until_timestamp"]) {

        currentContainer.untilTimestamp = [NSDate dateWithTimeIntervalSince1970:[currentContent intValue]];

    } else if ([elementName rangeOfString:@"x_container_policy_"].location == 0) {

        if (currentContainer.policy == nil)

            currentContainer.policy = [NSMutableDictionary dictionary];

        [currentContainer.policy setObject:currentContent forKey:[elementName substringFromIndex:19]];

    } else if ([elementName rangeOfString:@"x_container_meta_"].location == 0) {    

        if (currentContainer.metadata == nil)

            currentContainer.metadata = [NSMutableDictionary dictionary];

        [currentContainer.metadata setObject:currentContent forKey:[elementName substringFromIndex:17]];

	} else if ([elementName isEqualToString:@"container"]) {

		[containers addObject:currentContainer];

        self.currentContainer = nil;

	}

}

- (void)parser:(NSXMLParser *)parser foundCharacters:(NSString *)string {

    self.currentContent = [currentContent stringByAppendingString:string];

}

@end