How to get a NSDictionary with NSArray with file paths? - ios

Question

I have a NSArray which looks like this:
#[#"file1", #"directory/testfile", #"directory/otherdir/testfile", #"otherdir/", #"otherdir/otherfile"]
And I'm trying to convert it to a NSDictionary which looks like this:
#{
#"directory/":#{
#"otherdir/":#{
#"testfile":[..some array with data..]}
},
#"testfile":[..some array with data..]
},
#"otherdir/":#{
#"otherfile":[..some array with data..]
},
#"file1":[..some array with data..]
}
Basically, a NSDictionary which looks like a file tree. Thanks in advance!
EDIT: The actual array I have is this:
(
"blog/",
"blog/code.css",
"blog/style.css",
"etc/",
"etc/awsservices.png",
"etc/speeds.png",
"etc/test/",
"etc/test/other/",
"etc/test/other/speeds.png",
"site/",
"site/dino.png",
"site/error.css",
"site/main.css",
"site/signet.min.js"
)
And the code I wrote for this:
-(NSDictionary*)buildDictionaryWithContentsOfPath:(NSMutableArray*)files {
NSString *subDir;
NSMutableDictionary *returnable = [[NSMutableDictionary alloc] initWithDictionary:#{}];
BOOL directory;
NSLog(#"%#", files);
for (S3ObjectSummary *objectSummary in files) {
if ([[objectSummary key] hasSuffix:#"/"]) {
if (subDir && [[objectSummary key] hasPrefix:subDir]) {
NSLog(#"prefixed %#", [objectSummary key]);
NSMutableDictionary *treeDict = [[NSMutableDictionary alloc] initWithDictionary:#{}];
[returnable[subDir] setObject:treeDict forKey:[objectSummary key]];
} else {
subDir = [objectSummary key];
NSLog(#"dir %#", [objectSummary key]);
NSMutableDictionary *treeDict = [[NSMutableDictionary alloc] initWithDictionary:#{}];
[returnable setObject:treeDict forKey:[objectSummary key]];
}
directory = true;
} else {
S3GetObjectMetadataRequest *getMetadataRequest = [[S3GetObjectMetadataRequest alloc] initWithKey:[objectSummary key] withBucket:self.bucket.name];
S3GetObjectMetadataResponse *getMetadataResponse = [self.client getObjectMetadata:getMetadataRequest];
if (![[objectSummary key] hasPrefix:subDir]) {
NSLog(#"file %#",[objectSummary key]);
[returnable setObject:#{#"filename":[objectSummary key], #"directory":#(directory), #"created_at":getMetadataResponse.lastModified} forKey:[objectSummary key]];
} else {
for (NSString __strong *pathComp in [[objectSummary key] pathComponents]) {
pathComp = [NSString stringWithFormat:#"%#/", pathComp];
NSLog(#"path component %#", pathComp);
if (![[objectSummary key] hasSuffix:#"/"]) {
if (returnable[pathComp]) {
NSLog(#"has comp %#", pathComp);
[returnable[pathComp] setObject:#{#"filename":[objectSummary key], #"directory":#(directory), #"created_at":getMetadataResponse.lastModified} forKey:[objectSummary key]];
}
}
}
}
directory = false;
}
//[self.fileTree addObject:#{#"filename":[objectSummary key], #"directory":#(directory), #"created_at":getMetadataResponse.lastModified}];
}
return returnable;
}
And the dictionary it returns:
{
"blog/" = {
"blog/code.css" = {
"created_at" = "2013-12-07 12:13:37 +0000";
directory = 0;
filename = "blog/code.css";
};
"blog/style.css" = {
"created_at" = "2013-12-07 12:13:36 +0000";
directory = 0;
filename = "blog/style.css";
};
};
"etc/" = {
"etc/awsservices.png" = {
"created_at" = "2013-12-07 12:26:37 +0000";
directory = 0;
filename = "etc/awsservices.png";
};
"etc/speeds.png" = {
"created_at" = "2013-12-07 13:29:27 +0000";
directory = 0;
filename = "etc/speeds.png";
};
// PROBLEM HERE
"etc/test/" = {
};
"etc/test/other/" = {
};
"etc/test/other/speeds.png" = {
"created_at" = "2013-12-07 17:29:21 +0000";
directory = 0;
filename = "etc/test/other/speeds.png";
};
// PROBLEM HERE
};
"site/" = {
"site/dino.png" = {
"created_at" = "2013-12-07 12:13:59 +0000";
directory = 0;
filename = "pmerino/dino.png";
};
"site/error.css" = {
"created_at" = "2013-12-07 12:13:59 +0000";
directory = 0;
filename = "pmerino/error.css";
};
"site/main.css" = {
"created_at" = "2013-12-07 12:13:59 +0000";
directory = 0;
filename = "pmerino/main.css";
};
"site/signet.min.js" = {
"created_at" = "2013-12-07 12:13:59 +0000";
directory = 0;
filename = "pmerino/signet.min.js";
};
};
}
As you can see, this part:
"etc/test/" = {
};
"etc/test/other/" = {
};
"etc/test/other/speeds.png" = {
"created_at" = "2013-12-07 17:29:21 +0000";
directory = 0;
filename = "etc/test/other/speeds.png";
};
Should look like this:
"etc/" = {
"test/" = {
"other/" = {
"speeds.png" = {
"created_at" = "2013-12-07 17:29:21 +0000";
directory = 0;
filename = "etc/test/other/speeds.png";
};
};
};
};

Answer 1

If I understand your problem correctly, this method should be helpful:
// Add the path to the tree. Returns the "node" for this path.
-(NSMutableDictionary *)addFile:(NSString *)path toTree:(NSMutableDictionary *)tree
{
NSMutableDictionary *node = tree;
// Split path into components:
NSArray *components = [path componentsSeparatedByString:#"/"];
// Create all intermediate dictionaries:
for (NSUInteger i = 0; i < [components count] - 1; i++) {
NSString *key = [components[i] stringByAppendingString:#"/"];
if (node[key] == nil) {
node[key] = [NSMutableDictionary dictionary];
}
node = node[key];
}
// Process last component, which is the file name,
// or "" in the case of a dictionary:
NSString *name = [components lastObject];
if ([name length] > 0) {
node[name] = [NSMutableDictionary dictionary];
node = node[name];
}
return node;
}
If you use it like this:
NSArray *files = ...; // Your array of files
NSMutableDictionary *tree = [NSMutableDictionary dictionary];
for (NSString *path in files) {
NSMutableDictionary *node = [self addFile:path toTree:tree];
BOOL isDir = [path hasSuffix:#"/"];
if (!isDir) {
node[#"filename"] = path;
}
}
the resulting dictionary is
{
"blog/" = {
"code.css" = {
filename = "blog/code.css";
};
"style.css" = {
filename = "blog/style.css";
};
};
"etc/" = {
"awsservices.png" = {
filename = "etc/awsservices.png";
};
"speeds.png" = {
filename = "etc/speeds.png";
};
"test/" = {
"other/" = {
"speeds.png" = {
filename = "etc/test/other/speeds.png";
};
};
};
};
"site/" = {
"dino.png" = {
filename = "site/dino.png";
};
"error.css" = {
filename = "site/error.css";
};
"main.css" = {
filename = "site/main.css";
};
"signet.min.js" = {
filename = "site/signet.min.js";
};
};
}