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OPML export

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relikd
2018-12-29 01:26:06 +01:00
parent 62c5bef463
commit 0bd0e63f12
3 changed files with 106 additions and 0 deletions
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3
RSXML/RSOPMLItem.h
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@@ -41,9 +41,12 @@ extern NSString *OPMLXMLURLKey; //xmlUrl
@property (nonatomic, readonly) BOOL isFolder; // true if children.count > 0
@property (nonatomic, readonly) NSString *displayName; //May be nil.
+ (instancetype)itemWithAttributes:(NSDictionary *)attribs;
- (void)addChild:(RSOPMLItem *)child;
- (void)setAttribute:(id)value forKey:(NSString *)key;
- (id)attributeForKey:(NSString *)key;
- (NSString *)recursiveDescription;
- (NSString *)exportOPMLAsString;
@end

71
RSXML/RSOPMLItem.m
View File

@@ -42,26 +42,38 @@ NSString *OPMLXMLURLKey = @"xmlUrl";
@implementation RSOPMLItem
+ (instancetype)itemWithAttributes:(NSDictionary *)attribs {
RSOPMLItem *item = [[super alloc] init];
[item setAttributes:attribs];
return item;
}
/// @return A copy of the internal array.
- (NSArray *)children {
return [self.mutableChildren copy];
}
/// Replace internal array with new one.
- (void)setChildren:(NSArray<RSOPMLItem*>*)children {
self.mutableChildren = [children mutableCopy];
}
/// @return A copy of the internal dictionary.
- (NSDictionary *)attributes {
return [self.mutableAttributes copy];
}
/// Replace internal dictionary with new one.
- (void)setAttributes:(NSDictionary *)attributes {
self.mutableAttributes = [attributes mutableCopy];
}
/// @return @c YES if @c children.count @c > @c 0.
- (BOOL)isFolder {
return self.mutableChildren.count > 0;
}
/// @return Value for @c OPMLTitleKey. If not set, use @c OPMLTextKey, else return @c nil.
- (NSString *)displayName {
NSString *title = [self attributeForKey:OPMLTitleKey];
if (!title) {
@@ -70,6 +82,7 @@ NSString *OPMLXMLURLKey = @"xmlUrl";
return title;
}
/// Appends one child to the internal children array (creates new empty array if necessary).
- (void)addChild:(RSOPMLItem *)child {
if (!self.mutableChildren) {
self.mutableChildren = [NSMutableArray new];
@@ -77,6 +90,7 @@ NSString *OPMLXMLURLKey = @"xmlUrl";
[self.mutableChildren addObject:child];
}
/// Sets a value in the internal dictionary (creates new empty dictionary if necessary).
- (void)setAttribute:(id)value forKey:(NSString *)key {
if (!self.mutableAttributes) {
self.mutableAttributes = [NSMutableDictionary new];
@@ -84,6 +98,7 @@ NSString *OPMLXMLURLKey = @"xmlUrl";
[self.mutableAttributes setValue:value forKey:key];
}
/// @return Value for key (case-independent).
- (id)attributeForKey:(NSString *)key {
if (self.mutableAttributes.count > 0 && key && key.length > 0) {
return [self.mutableAttributes rsxml_objectForCaseInsensitiveKey:key];
@@ -102,6 +117,7 @@ NSString *OPMLXMLURLKey = @"xmlUrl";
return str;
}
/// Used by @c recursiveDescription.
- (void)appendStringRecursive:(NSMutableString *)str indent:(NSString *)prefix {
[str appendFormat:@"%@%@\n", prefix, self];
if (self.isFolder) {
@@ -112,10 +128,65 @@ NSString *OPMLXMLURLKey = @"xmlUrl";
}
}
/// Print object description for debugging purposes.
- (NSString *)recursiveDescription {
NSMutableString *mStr = [NSMutableString new];
[self appendStringRecursive:mStr indent:@""];
return mStr;
}
/// @return Nicely formatted string that can be used to export as @c .opml file.
- (NSString *)exportOPMLAsString {
NSMutableString *str = [NSMutableString new];
[str appendString:
@"<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n"
@"<opml version=\"1.0\">\n"
@" <head>\n"];
[self appendHeaderTagsToString:str prefix:@" "];
[str appendString:
@" </head>\n"
@" <body>\n"];
for (RSOPMLItem *child in _mutableChildren) {
[child appendChildAttributesToString:str prefix:@" "];
}
[str appendString:
@" </body>\n"
@"</opml>"];
return str;
}
/**
The header attributes are added as separate tags. Quite opposite to outline items.
@note Used by @c exportOPMLAsString.
*/
- (void)appendHeaderTagsToString:(NSMutableString *)str prefix:(NSString *)prefix {
for (NSString *key in _mutableAttributes) {
[str appendFormat:@"%1$@<%2$@>%3$@</%2$@>\n", prefix, key, _mutableAttributes[key]];
}
}
/**
Create outline items for this @c RSOPMLItem and all children recursively.
@note Used by @c exportOPMLAsString.
*/
- (void)appendChildAttributesToString:(NSMutableString *)str prefix:(NSString *)prefix {
NSString *name = [self displayName];
[str appendFormat:@"%1$@<outline title=\"%2$@\" text=\"%2$@\"", prefix, name]; // name comes first
for (NSString *key in _mutableAttributes) {
if ([key isEqualToString:OPMLTitleKey] || [key isEqualToString:OPMLTextKey]) {
continue;
}
[str appendFormat:@" %@=\"%@\"", key, _mutableAttributes[key]];
}
[str appendString:@">"];
if (_mutableChildren.count > 0) {
[str appendString:@"\n"];
for (RSOPMLItem *child in _mutableChildren) {
[child appendChildAttributesToString:str prefix:[prefix stringByAppendingString:@" "]];
}
[str appendString:prefix];
}
[str appendString:@"</outline>\n"];
}
@end