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//
// MCOMessageView.m
// testUI
//
// Created by DINH Viêt Hoà on 1/19/13.
// Copyright (c) 2013 MailCore. All rights reserved.
//
#import "MCOMessageView.h"
@interface MCOMessageView () <MCOHTMLRendererIMAPDelegate>
@end
@implementation MCOMessageView {
UIWebView * _webView;
NSString * _folder;
MCOAbstractMessage * _message;
__weak id <MCOMessageViewDelegate> _delegate;
BOOL _prefetchIMAPImagesEnabled;
BOOL _prefetchIMAPAttachmentsEnabled;
}
@synthesize folder = _folder;
@synthesize delegate = _delegate;
@synthesize prefetchIMAPImagesEnabled = _prefetchIMAPImagesEnabled;
@synthesize prefetchIMAPAttachmentsEnabled = _prefetchIMAPAttachmentsEnabled;
- (id)initWithFrame:(CGRect)frame
{
self = [super initWithFrame:frame];
if(self) {
_webView = [[UIWebView alloc] initWithFrame:[self bounds]];
[_webView setAutoresizingMask:(UIViewAutoresizingFlexibleHeight|UIViewAutoresizingFlexibleWidth)];
[_webView setDelegate:self];
[self addSubview:_webView];
}
return self;
}
- (void) dealloc
{
_message = nil;
_folder = nil;
_webView = nil;
}
- (void) setMessage:(MCOAbstractMessage *)message
{
_message = message;
[_webView stopLoading];
[self _refresh];
}
- (MCOAbstractMessage *) message
{
return _message;
}
- (void) _refresh
{
NSString * content;
if (_message == nil) {
content = nil;
}
else {
if ([_message isKindOfClass:[MCOIMAPMessage class]]) {
content = [(MCOIMAPMessage *) _message htmlRenderingWithFolder:_folder delegate:self];
}
else if ([_message isKindOfClass:[MCOMessageBuilder class]]) {
content = [(MCOMessageBuilder *) _message htmlRenderingWithDelegate:self];
}
else if ([_message isKindOfClass:[MCOMessageParser class]]) {
content = [(MCOMessageParser *) _message htmlRenderingWithDelegate:self];
}
else {
content = nil;
MCAssert(0);
}
}
if (content == nil) {
[_webView loadHTMLString:@"" baseURL:nil];
return;
}
NSMutableString * html = [NSMutableString string];
NSURL * jsURL = [[NSBundle mainBundle] URLForResource:@"MCOMessageViewScript" withExtension:@"js"];
[html appendFormat:@"<html><head><script src=\"%@\"></script></head><body'>%@</body><iframe src='x-mailcore-msgviewloaded:' style='width: 0px; height: 0px; border: none;'></iframe></html>",
[jsURL absoluteString], content];
[_webView loadHTMLString:html baseURL:nil];
}
- (BOOL) _isCID:(NSURL *)url
{
NSString *theScheme = [url scheme];
if ([theScheme caseInsensitiveCompare:@"cid"] == NSOrderedSame)
return YES;
return NO;
}
- (BOOL) _isXMailcoreImage:(NSURL *)url
{
NSString *theScheme = [url scheme];
if ([theScheme caseInsensitiveCompare:@"x-mailcore-image"] == NSOrderedSame)
return YES;
return NO;
}
- (void) _loadImages
{
NSString * result = [_webView stringByEvaluatingJavaScriptFromString:@"findCIDImageURL()"];
NSData * data = [result dataUsingEncoding:NSUTF8StringEncoding];
NSError *error = nil;
NSArray * imagesURLStrings = [NSJSONSerialization JSONObjectWithData:data options:0 error:&error];
for(NSString * urlString in imagesURLStrings) {
MCOAbstractPart * part = nil;
NSURL * url;
url = [NSURL URLWithString:urlString];
if ([self _isCID:url]) {
part = [self _partForCIDURL:url];
}
else if ([self _isXMailcoreImage:url]) {
NSString * specifier = [url resourceSpecifier];
NSString * partUniqueID = specifier;
part = [self _partForUniqueID:partUniqueID];
}
if (part == nil)
continue;
NSString * partUniqueID = [part uniqueID];
NSData * data = [[self delegate] MCOMessageView:self dataForPartWithUniqueID:partUniqueID];
void (^replaceImages)(NSError *error) = ^(NSError *error) {
NSData * downloadedData = [[self delegate] MCOMessageView:self dataForPartWithUniqueID:partUniqueID];
NSData * previewData = [[self delegate] MCOMessageView:self previewForData:downloadedData isHTMLInlineImage:[self _isCID:url]];
NSString * filename = [NSString stringWithFormat:@"%lu", (unsigned long)urlString.hash];
NSURL * cacheURL = [self _cacheJPEGImageData:previewData withFilename:filename];
NSDictionary * args = @{ @"URLKey": urlString, @"LocalPathKey": cacheURL.absoluteString };
NSString * jsonString = [self _jsonEscapedStringFromDictionary:args];
NSString * replaceScript = [NSString stringWithFormat:@"replaceImageSrc(%@)", jsonString];
[_webView stringByEvaluatingJavaScriptFromString:replaceScript];
};
if (data == nil) {
[[self delegate] MCOMessageView:self fetchDataForPartWithUniqueID:partUniqueID downloadedFinished:^(NSError * error) {
replaceImages(error);
}];
} else {
replaceImages(nil);
}
}
}
- (NSString *) _jsonEscapedStringFromDictionary:(NSDictionary *)dictionary
{
NSData * json = [NSJSONSerialization dataWithJSONObject:dictionary options:0 error:nil];
NSString * jsonString = [[NSString alloc] initWithData:json encoding:NSUTF8StringEncoding];
return jsonString;
}
- (NSURL *) _cacheJPEGImageData:(NSData *)imageData withFilename:(NSString *)filename
{
NSString * path = [[NSTemporaryDirectory() stringByAppendingPathComponent:filename] stringByAppendingPathExtension:@"jpg"];
[imageData writeToFile:path atomically:YES];
return [NSURL fileURLWithPath:path];
}
- (MCOAbstractPart *) _partForCIDURL:(NSURL *)url
{
return [_message partForContentID:[url resourceSpecifier]];
}
- (MCOAbstractPart *) _partForUniqueID:(NSString *)partUniqueID
{
return [_message partForUniqueID:partUniqueID];
}
- (NSData *) _dataForIMAPPart:(MCOIMAPPart *)part folder:(NSString *)folder
{
NSData * data;
NSString * partUniqueID = [part uniqueID];
data = [[self delegate] MCOMessageView:self dataForPartWithUniqueID:partUniqueID];
if (data == NULL) {
[[self delegate] MCOMessageView:self fetchDataForPartWithUniqueID:partUniqueID downloadedFinished:^(NSError * error) {
[self _refresh];
}];
}
return data;
}
- (BOOL)webView:(UIWebView *)webView shouldStartLoadWithRequest:(NSURLRequest *)request navigationType:(UIWebViewNavigationType)navigationType {
NSURLRequest *responseRequest = [self webView:webView resource:nil willSendRequest:request redirectResponse:nil fromDataSource:nil];
if(responseRequest == request) {
return YES;
} else {
[webView loadRequest:responseRequest];
return NO;
}
}
- (NSURLRequest *)webView:(UIWebView *)sender resource:(id)identifier willSendRequest:(NSURLRequest *)request redirectResponse:(NSURLResponse *)redirectResponse fromDataSource:(id)dataSource
{
if ([[[request URL] scheme] isEqualToString:@"x-mailcore-msgviewloaded"]) {
[self _loadImages];
}
return request;
}
- (BOOL) MCOAbstractMessage:(MCOAbstractMessage *)msg canPreviewPart:(MCOAbstractPart *)part
{
static NSMutableSet * supportedImageMimeTypes = NULL;
if (supportedImageMimeTypes == NULL) {
supportedImageMimeTypes = [[NSMutableSet alloc] init];
[supportedImageMimeTypes addObject:@"image/png"];
[supportedImageMimeTypes addObject:@"image/gif"];
[supportedImageMimeTypes addObject:@"image/jpg"];
[supportedImageMimeTypes addObject:@"image/jpeg"];
}
static NSMutableSet * supportedImageExtension = NULL;
if (supportedImageExtension == NULL) {
supportedImageExtension = [[NSMutableSet alloc] init];
[supportedImageExtension addObject:@"png"];
[supportedImageExtension addObject:@"gif"];
[supportedImageExtension addObject:@"jpg"];
[supportedImageExtension addObject:@"jpeg"];
}
if ([supportedImageMimeTypes containsObject:[[part mimeType] lowercaseString]])
return YES;
NSString * ext = nil;
if ([part filename] != nil) {
if ([[part filename] pathExtension] != nil) {
ext = [[[part filename] pathExtension] lowercaseString];
}
}
if (ext != nil) {
if ([supportedImageExtension containsObject:ext])
return YES;
}
if (![[self delegate] respondsToSelector:@selector(MCOMessageView:canPreviewPart:)]) {
return false;
}
return [[self delegate] MCOMessageView:self canPreviewPart:part];
}
- (NSDictionary *) MCOAbstractMessage:(MCOAbstractMessage *)msg templateValuesForHeader:(MCOMessageHeader *)header
{
if (![[self delegate] respondsToSelector:@selector(MCOMessageView:templateValuesForHeader:)]) {
return nil;
}
return [[self delegate] MCOMessageView:self templateValuesForHeader:header];
}
- (NSDictionary *) MCOAbstractMessage:(MCOAbstractMessage *)msg templateValuesForPart:(MCOAbstractPart *)part
{
if (![[self delegate] respondsToSelector:@selector(MCOMessageView:templateValuesForPartWithUniqueID:)]) {
return nil;
}
return [[self delegate] MCOMessageView:self templateValuesForPartWithUniqueID:[part uniqueID]];
}
- (NSString *) MCOAbstractMessage_templateForMainHeader:(MCOAbstractMessage *)msg
{
if (![[self delegate] respondsToSelector:@selector(MCOMessageView_templateForMainHeader:)]) {
return nil;
}
return [[self delegate] MCOMessageView_templateForMainHeader:self];
}
- (NSString *) MCOAbstractMessage_templateForImage:(MCOAbstractMessage *)msg
{
NSString * templateString;
if ([[self delegate] respondsToSelector:@selector(MCOMessageView_templateForImage:)]) {
templateString = [[self delegate] MCOMessageView_templateForImage:self];
}
else {
templateString = @"<img src=\"{{URL}}\"/>";
}
templateString = [NSString stringWithFormat:@"<div id=\"{{CONTENTID}}\">%@</div>", templateString];
return templateString;
}
- (NSString *) MCOAbstractMessage_templateForAttachment:(MCOAbstractMessage *)msg
{
if (![[self delegate] respondsToSelector:@selector(MCOMessageView_templateForAttachment:)]) {
return NULL;
}
NSString * templateString = [[self delegate] MCOMessageView_templateForAttachment:self];
templateString = [NSString stringWithFormat:@"<div id=\"{{CONTENTID}}\">%@</div>", templateString];
return templateString;
}
- (NSString *) MCOAbstractMessage_templateForMessage:(MCOAbstractMessage *)msg
{
if (![[self delegate] respondsToSelector:@selector(MCOMessageView_templateForMessage:)]) {
return NULL;
}
return [[self delegate] MCOMessageView_templateForMessage:self];
}
- (NSString *) MCOAbstractMessage_templateForEmbeddedMessage:(MCOAbstractMessage *)msg
{
if (![[self delegate] respondsToSelector:@selector(MCOMessageView_templateForEmbeddedMessage:)]) {
return NULL;
}
return [[self delegate] MCOMessageView_templateForEmbeddedMessage:self];
}
- (NSString *) MCOAbstractMessage_templateForEmbeddedMessageHeader:(MCOAbstractMessage *)msg
{
if (![[self delegate] respondsToSelector:@selector(MCOMessageView_templateForEmbeddedMessageHeader:)]) {
return NULL;
}
return [[self delegate] MCOMessageView_templateForEmbeddedMessageHeader:self];
}
- (NSString *) MCOAbstractMessage_templateForAttachmentSeparator:(MCOAbstractMessage *)msg
{
if (![[self delegate] respondsToSelector:@selector(MCOMessageView_templateForAttachmentSeparator:)]) {
return NULL;
}
return [[self delegate] MCOMessageView_templateForAttachmentSeparator:self];
}
- (NSString *) MCOAbstractMessage:(MCOAbstractMessage *)msg filterHTMLForPart:(NSString *)html
{
if (![[self delegate] respondsToSelector:@selector(MCOMessageView:filteredHTMLForPart:)]) {
return html;
}
return [[self delegate] MCOMessageView:self filteredHTMLForPart:html];
}
- (NSString *) MCOAbstractMessage:(MCOAbstractMessage *)msg filterHTMLForMessage:(NSString *)html
{
if (![[self delegate] respondsToSelector:@selector(MCOMessageView:filteredHTMLForMessage:)]) {
return html;
}
return [[self delegate] MCOMessageView:self filteredHTMLForMessage:html];
}
- (NSData *) MCOAbstractMessage:(MCOAbstractMessage *)msg dataForIMAPPart:(MCOIMAPPart *)part folder:(NSString *)folder
{
return [self _dataForIMAPPart:part folder:folder];
}
- (void) MCOAbstractMessage:(MCOAbstractMessage *)msg prefetchAttachmentIMAPPart:(MCOIMAPPart *)part folder:(NSString *)folder
{
if (!_prefetchIMAPAttachmentsEnabled)
return;
NSString * partUniqueID = [part uniqueID];
[[self delegate] MCOMessageView:self fetchDataForPartWithUniqueID:partUniqueID downloadedFinished:^(NSError * error) {
// do nothing
}];
}
- (void) MCOAbstractMessage:(MCOAbstractMessage *)msg prefetchImageIMAPPart:(MCOIMAPPart *)part folder:(NSString *)folder
{
if (!_prefetchIMAPImagesEnabled)
return;
NSString * partUniqueID = [part uniqueID];
[[self delegate] MCOMessageView:self fetchDataForPartWithUniqueID:partUniqueID downloadedFinished:^(NSError * error) {
// do nothing
}];
}
@end
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