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//  ASIPithosContainerRequest.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 "ASIPithosContainerRequest.h"

#import "ASIPithosContainer.h"

#import "ASIPithosObject.h"

@implementation ASIPithosContainerRequest

@synthesize containerName;

@synthesize currentElement, currentContent, currentObject;

#pragma mark -

#pragma mark Constructors

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

    NSString *urlString = [NSString stringWithFormat:@"%@/%@", [self storageURL], containerName];

    if (queryString)

        urlString = [urlString stringByAppendingString:queryString];

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

	[request setRequestMethod:method];

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

    request.containerName = containerName;

	return request;

}

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

	return [self storageRequestWithMethod:method containerName:containerName queryString:nil];

}

#pragma mark -

#pragma mark Memory Management

- (void)dealloc {

	[currentObject release];

    [currentContent release];

    [currentElement release];

    [objects release];

    [metadata release];

    [policy release];

    [containerName release];

	[super dealloc];

}

#pragma mark -

#pragma mark HEAD

// HEAD storageURL/container

+ (id)containerMetadataRequestWithContainerName:(NSString *)containerName {

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

}

// HEAD storageURL/container?[until=untilTimestamp]

+ (id)containerMetadataRequestWithContainerName:(NSString *)containerName until:(NSDate *)untilTimestamp {

    NSString *queryString = nil;

    if (untilTimestamp)

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

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

}

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

+ (id)containerMetadataRequestWithContainerName:(NSString *)containerName 

                                          until:(NSDate *)untilTimestamp 

                                ifModifiedSince:(NSDate *)sinceTimestamp {

    ASIPithosContainerRequest *request = [self containerMetadataRequestWithContainerName:containerName until:untilTimestamp];

    [request addRequestIfModifiedSinceHeader:sinceTimestamp];

    return request;

}

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

+ (id)containerMetadataRequestWithContainerName:(NSString *)containerName 

                                          until:(NSDate *)untilTimestamp 

                              ifUnmodifiedSince:(NSDate *)sinceTimestamp {

    ASIPithosContainerRequest *request = [self containerMetadataRequestWithContainerName:containerName until:untilTimestamp];

    [request addRequestIfUnmodifiedSinceHeader:sinceTimestamp];

    return request;

}

- (NSUInteger)objectCount {

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

}

- (NSUInteger)bytesUsed {

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

}

- (NSUInteger)blockSize {

	return [[[self responseHeaders] objectForKey:@"X-Container-Block-Size"] intValue];

}

- (NSString *)blockHash {

	return [[self responseHeaders] objectForKey:@"X-Container-Block-Hash"];

}

- (NSArray *)objectMeta {

    return [[[self responseHeaders] objectForKey:@"X-Container-Object-Meta"] componentsSeparatedByString:@","];

}

- (NSDate *)untilTimestamp {

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

    if (untilTimestampString)

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

    return nil;

}

- (NSDictionary *)policy {

    if (policy == nil) {

        policy = [self getHeadersDictionaryForPrefix:@"X-Container-Policy-"];

        [policy retain];

    }

    return policy;

}

- (NSDictionary *)metadata {

    if (metadata == nil) {

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

        [metadata retain];

    }

    return metadata;

}

- (NSDate *)lastModified {

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

    if (lastModifiedString)

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

    return nil;

}

- (ASIPithosContainer *)container {

    ASIPithosContainer *container = [ASIPithosContainer container];

    container.name = containerName;

    container.count = [self objectCount];

    container.bytes = [self bytesUsed];

    container.lastModified = [self lastModified];

    container.untilTimestamp = [self untilTimestamp];

    container.policy = (NSMutableDictionary *)[self policy];

    container.metadata = (NSMutableDictionary *)[self metadata];

    container.blockSize =  [self blockSize];

    container.blockHash =  [self blockHash];

    container.objectMeta = (NSMutableArray *)[self objectMeta];

    [self objectMeta];

    return container;

}

#pragma mark -

#pragma mark GET

// GET storageURL/container

+ (id)listObjectsRequestWithContainerName:(NSString *)containerName {

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

}

// GET storageURL?[limit=limit]&[marker=marker]&[prefix=prefix]&[delimiter=delimiter]&[path=path]&[meta=meta]&[shared=]&[until=untilTimestamp]

+ (id)listObjectsRequestWithContainerName:(NSString *)containerName

                                    limit:(NSUInteger)limit 

                                   marker:(NSString *)marker 

                                   prefix:(NSString *)prefix 

                                delimiter:(NSString *)delimiter 

                                     path:(NSString *)path 

                                     meta:(NSArray *)meta 

                                   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 (prefix)

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

	if (delimiter)

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

	if (path)

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

    if (meta)

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

	if (shared)

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

    if (untilTimestamp)

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

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

}

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

+ (id)listObjectsRequestWithContainerName:(NSString *)containerName

                                    limit:(NSUInteger)limit 

                                   marker:(NSString *)marker 

                                   prefix:(NSString *)prefix 

                                delimiter:(NSString *)delimiter 

                                     path:(NSString *)path 

                                     meta:(NSArray *)meta 

                                   shared:(BOOL)shared

                                    until:(NSDate *)untilTimestamp 

                          ifModifiedSince:(NSDate *)sinceTimestamp {

    ASIPithosContainerRequest *request = [self listObjectsRequestWithContainerName:containerName 

                                                                             limit:limit 

                                                                            marker:marker 

                                                                            prefix:prefix 

                                                                         delimiter:delimiter 

                                                                              path:path 

                                                                              meta:meta 

                                                                            shared:shared 

                                                                             until:untilTimestamp];

    [request addRequestIfModifiedSinceHeader:sinceTimestamp];

    return request;

}

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

+ (id)listObjectsRequestWithContainerName:(NSString *)containerName

                                    limit:(NSUInteger)limit 

                                   marker:(NSString *)marker 

                                   prefix:(NSString *)prefix 

                                delimiter:(NSString *)delimiter 

                                     path:(NSString *)path 

                                     meta:(NSArray *)meta 

                                   shared:(BOOL)shared

                                    until:(NSDate *)untilTimestamp 

                        ifUnmodifiedSince:(NSDate *)sinceTimestamp {

    ASIPithosContainerRequest *request = [self listObjectsRequestWithContainerName:containerName 

                                                                             limit:limit 

                                                                            marker:marker 

                                                                            prefix:prefix 

                                                                         delimiter:delimiter 

                                                                              path:path 

                                                                              meta:meta 

                                                                            shared:shared 

                                                                             until:untilTimestamp];

    [request addRequestIfUnmodifiedSinceHeader:sinceTimestamp];

    return request;

}

- (NSArray *)objects {

    if (objects == nil) {

        objects = [[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 objects;

}

#pragma mark -

#pragma mark PUT

// PUT storageURL/container

+ (id)createOrUpdateContainerRequestWithContainerName:(NSString *)containerName {

    return [self storageRequestWithMethod:@"PUT" containerName:containerName];

}

+ (id)createOrUpdateContainerRequestWithContainerName:(NSString *)containerName policy:(NSDictionary *)policy metadata:(NSDictionary *)metadata {

    ASIPithosContainerRequest *request = [self storageRequestWithMethod:@"PUT" containerName:containerName];

    if (policy) {

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

            [request addRequestHeader:[NSString stringWithFormat:@"X-Container-Policy-%@", key] value:[policy objectForKey:key]];

        }

    }

    if (metadata) {

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

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

        }

    }

	return request;

}

#pragma mark -

#pragma mark POST

// POST storageURL/container

+ (id)updateContainerMetadataRequestWithContainerName:(NSString *)containerName {

    return [self storageRequestWithMethod:@"POST" containerName:containerName];

}

// POST storageURL/container?[update=]

+ (id)updateContainerMetadataRequestWithContainerName:(NSString *)containerName 

                                               policy:(NSDictionary *)policy 

                                             metadata:(NSDictionary *)metadata 

                                               update:(BOOL)update {

    NSString *queryString = nil;

    if (update)

        queryString = @"?update=";

    ASIPithosContainerRequest *request = [self storageRequestWithMethod:@"POST" 

                                                                               containerName:containerName

                                                                                 queryString:queryString];

    if (policy) {

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

            [request addRequestHeader:[NSString stringWithFormat:@"X-Container-Policy-%@", key] value:[policy objectForKey:key]];

        }

    }

    if (metadata) {

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

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

        }

    }

	return request;

}

#pragma mark -

#pragma mark DELETE

// DELETE storageURL/container

+ (id)deleteContainerRequestWithContainerName:(NSString *)containerName {

    return [self storageRequestWithMethod:@"DELETE" containerName:containerName];

}

// DELETE storageURL/container?[until=untilTimestamp]

+ (id)deleteContainerRequestWithContainerName:(NSString *)containerName until:(NSDate *)untilTimestamp {

    NSString *queryString = nil;

    if (untilTimestamp)

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

	return [self storageRequestWithMethod:@"DELETE" containerName:containerName queryString:queryString];    

}

#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:@"object"]) {

		self.currentObject = [ASIPithosObject object];

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

		[objects addObject:[ASIPithosObject subdirWithName:[attributeDict valueForKey:@"name"]]];

	}

	self.currentContent = @"";

}

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

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

        currentObject.name = currentContent;

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

        currentObject.hash = currentContent;

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

        currentObject.bytes = [currentContent intValue];

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

        currentObject.contentType = currentContent;

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

        currentObject.contentEncoding = currentContent;

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

        currentObject.contentDisposition = currentContent;

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

        currentObject.lastModified = [[self dateFormatterWithFormatId:0] dateFromString:currentContent];

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

        currentObject.version = currentContent;

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

        currentObject.versionTimestamp = [NSDate dateWithTimeIntervalSince1970:[currentContent intValue]];

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

        currentObject.modifiedBy = currentContent;

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

        currentObject.manifest = currentContent;

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

        currentObject.sharing = currentContent;

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

        currentObject.sharedBy = currentContent;

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

        currentObject.publicURI = currentContent;

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

        if (currentObject.metadata == nil)

            currentObject.metadata = [NSMutableDictionary dictionary];

        [currentObject.metadata setObject:currentContent forKey:[elementName substringFromIndex:14]];

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

		[objects addObject:currentObject];

        self.currentObject = nil;

	}

}

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

    self.currentContent = [currentContent stringByAppendingString:string];

}

@end