481 lines
17 KiB
Mathematica
481 lines
17 KiB
Mathematica
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//
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// XMPPDataForm.m
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// monalxmpp
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//
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// Created by ich on 12.10.20.
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// Copyright © 2020 Monal.im. All rights reserved.
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//
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#import <Foundation/Foundation.h>
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#import "XMPPDataForm.h"
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#import "HelperTools.h"
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@interface MLXMLNode()
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@property (atomic, strong, readwrite) NSString* element;
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-(void) invalidateUpstreamCache;
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@end
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@implementation XMPPDataForm
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static NSRegularExpression* dataFormQueryRegex;
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+(void) initialize
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{
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dataFormQueryRegex = [NSRegularExpression regularExpressionWithPattern:@"^(\\{(\\*|[^}]+)\\})?([!a-zA-Z0-9_:-]+|\\*)?(\\[([0-9]+)\\])?(@[a-zA-Z0-9_:#-]+|&[a-zA-Z0-9_:#-]+)?" options:0 error:nil];
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}
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//this simple init is not public api because type and form type are mandatory in xep-0004
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-(id _Nonnull) init
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{
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self = [super init];
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self.element = @"x";
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[self setXMLNS:@"jabber:x:data"];
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return self;
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}
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-(id _Nonnull) initWithType:(NSString* _Nonnull) type andFormType:(NSString* _Nonnull) formType
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{
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self = [self init];
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self.attributes[@"type"] = type;
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[self setField:@"FORM_TYPE" withType:@"hidden" andValue:formType];
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return self;
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}
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-(id _Nonnull) initWithType:(NSString* _Nonnull) type formType:(NSString* _Nonnull) formType andDictionary:(NSDictionary* _Nonnull) vars
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{
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self = [self initWithType:type andFormType:formType];
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[self addEntriesFromDictionary:vars];
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return self;
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}
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-(MLXMLNode*) setFieldWithDictionary:(NSDictionary*) field
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{
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return [self setFieldWithDictionary:field atIndex:nil];
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}
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-(MLXMLNode*) setFieldWithDictionary:(NSDictionary*) field atIndex:(NSNumber* _Nullable) index
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{
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MLXMLNode* fieldNode = [self setField:field[@"name"] withType:field[@"type"] andValue:[NSString stringWithFormat:@"%@", field[@"value"]] atIndex:index];
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if(field[@"options"])
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{
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for(NSString* option in field[@"options"])
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if([field[@"options"][option] isEqualToString:option])
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[fieldNode addChildNode:[[MLXMLNode alloc] initWithElement:@"option" withAttributes:@{} andChildren:@[
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[[MLXMLNode alloc] initWithElement:@"value" withAttributes:@{} andChildren:@[] andData:option]
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] andData:nil]];
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else
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[fieldNode addChildNode:[[MLXMLNode alloc] initWithElement:@"option" withAttributes:@{@"label": field[@"options"][option]} andChildren:@[
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[[MLXMLNode alloc] initWithElement:@"value" withAttributes:@{} andChildren:@[] andData:option]
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] andData:nil]];
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}
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if(field[@"description"])
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[fieldNode addChildNode:[[MLXMLNode alloc] initWithElement:@"desc" withAttributes:@{} andChildren:@[] andData:field[@"description"]]];
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if(field[@"required"] && [field[@"required"] boolValue])
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[fieldNode addChildNode:[[MLXMLNode alloc] initWithElement:@"required" withAttributes:@{} andChildren:@[] andData:nil]];
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return fieldNode;
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}
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-(MLXMLNode*) setField:(NSString* _Nonnull) name withValue:(NSString* _Nonnull) value
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{
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return [self setField:name withValue:value atIndex:nil];
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}
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-(MLXMLNode*) setField:(NSString* _Nonnull) name withValue:(NSString* _Nonnull) value atIndex:(NSNumber* _Nullable) index
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{
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return [self setField:name withType:nil andValue:value atIndex:index];
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}
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-(MLXMLNode*) setField:(NSString* _Nonnull) name withType:(NSString* _Nullable) type andValue:(NSString* _Nonnull) value
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{
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return [self setField:name withType:type andValue:value atIndex:nil];
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}
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-(MLXMLNode*) setField:(NSString* _Nonnull) name withType:(NSString* _Nullable) type andValue:(NSString* _Nonnull) value atIndex:(NSNumber* _Nullable) index
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{
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MLXMLNode* operateAtNode = self;
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if(index != nil)
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{
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NSArray<MLXMLNode*>* items = [self find:@"item"];
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operateAtNode = items[[index unsignedIntegerValue]];
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}
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MLAssert(operateAtNode != nil, @"index out of bounds for multi-item form!", (@{
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@"index": index,
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@"dataform": self,
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}));
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NSDictionary* attrs = type ? @{@"type": type, @"var": name} : @{@"var": name};
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[operateAtNode removeChildNode:[operateAtNode findFirst:@"field<var=%@>", name]];
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MLXMLNode* field = [operateAtNode addChildNode:[[MLXMLNode alloc] initWithElement:@"field" withAttributes:attrs andChildren:@[
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[[MLXMLNode alloc] initWithElement:@"value" withAttributes:@{} andChildren:@[] andData:value]
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] andData:nil]];
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[self invalidateUpstreamCache]; //make sure future queries accurately reflect this change
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return field;
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}
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-(NSDictionary* _Nullable) getField:(NSString* _Nonnull) name
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{
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return [self getField:name atIndex:nil];
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}
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-(NSDictionary* _Nullable) getField:(NSString* _Nonnull) name atIndex:(NSNumber* _Nullable) index
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{
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MLXMLNode* fieldNode;
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MLXMLNode* descriptionNode;
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if(index != nil)
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{
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descriptionNode = [self findFirst:@"reported/field<var=%@>", name];
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NSArray<MLXMLNode*>* items = [self find:@"item"];
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fieldNode = [items[[index unsignedIntegerValue]] findFirst:@"field<var=%@>", name];
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}
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else
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{
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fieldNode = [self findFirst:@"field<var=%@>", name];
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}
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if(!fieldNode)
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return nil;
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if(descriptionNode == nil)
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descriptionNode = fieldNode;
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NSMutableDictionary* options = [NSMutableDictionary new];
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for(MLXMLNode* option in [fieldNode find:@"option"])
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options[[NSString stringWithFormat:@"%@", [option findFirst:@"value#"]]] = [NSString stringWithFormat:@"%@", ([option check:@"/@label"] ? [option findFirst:@"/@label"] : [option findFirst:@"value#"])];
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NSMutableArray* allValues = [NSMutableArray new];
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for(id value in [fieldNode find:@"value#"])
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if(value != nil) //only safeguard, should never happen
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[allValues addObject:[NSString stringWithFormat:@"%@", value]];
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if([descriptionNode check:@"/@type"])
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return @{
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@"name": [NSString stringWithFormat:@"%@", [fieldNode findFirst:@"/@var"]],
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@"type": [NSString stringWithFormat:@"%@", [descriptionNode findFirst:@"/@type"]],
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@"value": [NSString stringWithFormat:@"%@", [fieldNode findFirst:@"value#"]],
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@"allValues": [allValues copy], //immutable copy
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@"options": [options copy], //immutable copy
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@"description": [NSString stringWithFormat:@"%@", [fieldNode findFirst:@"description#"]],
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@"required": @([fieldNode check:@"required"]),
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};
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return @{
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@"name": [NSString stringWithFormat:@"%@", [fieldNode findFirst:@"/@var"]],
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@"value": [NSString stringWithFormat:@"%@", [fieldNode findFirst:@"value#"]],
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@"allValues": [allValues copy], //immutable copy
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@"options": [options copy], //immutable copy
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@"description": [NSString stringWithFormat:@"%@", [fieldNode findFirst:@"description#"]],
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@"required": @([fieldNode check:@"required"]),
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};
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}
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-(void) removeField:(NSString* _Nonnull) name
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{
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[self removeField:name atIndex:nil];
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}
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-(void) removeField:(NSString* _Nonnull) name atIndex:(NSNumber* _Nullable) index
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{
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if(index != nil)
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{
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NSArray<MLXMLNode*>* items = [self find:@"item"];
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[self removeChildNode:[items[[index unsignedIntegerValue]] findFirst:@"field<var=%@>", name]];
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}
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else
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[self removeChildNode:[self findFirst:@"field<var=%@>", name]];
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[self invalidateUpstreamCache]; //make sure future queries accurately reflect this change
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}
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-(void) setType:(NSString* _Nonnull) type
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{
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self.attributes[@"type"] = type;
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[self invalidateUpstreamCache]; //make sure future queries accurately reflect this change
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}
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-(NSString*) type
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{
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return self.attributes[@"type"];
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}
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-(void) setFormType:(NSString* _Nonnull) formType
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{
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[self setField:@"FORM_TYPE" withType:@"hidden" andValue:formType];
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}
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-(NSString*) formType
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{
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return self[@"FORM_TYPE"];
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}
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-(NSString* _Nullable) title
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{
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return [self findFirst:@"title"];
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}
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-(void) setTitle:(NSString* _Nullable) title
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{
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if([self check:@"title"])
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((MLXMLNode*)[self findFirst:@"title"]).data = title;
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else
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[self addChildNode:[[MLXMLNode alloc] initWithElement:@"title" andData:title]];
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}
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-(NSString* _Nullable) instructions
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{
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return [self findFirst:@"instructions"];
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}
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-(void) setInstructions:(NSString* _Nullable) instructions
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{
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if([self check:@"instructions"])
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((MLXMLNode*)[self findFirst:@"instructions"]).data = instructions;
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else
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[self addChildNode:[[MLXMLNode alloc] initWithElement:@"instructions" andData:instructions]];
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}
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-(id _Nullable) processDataFormQuery:(NSString*) query
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{
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//parse query
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NSMutableDictionary* parsedQuery = [NSMutableDictionary new];
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NSArray* matches = [dataFormQueryRegex matchesInString:query options:0 range:NSMakeRange(0, [query length])];
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if(![matches count])
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@throw [NSException exceptionWithName:@"RuntimeException" reason:@"Could not parse data form query!" userInfo:@{
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@"node": self,
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@"query": query
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}];
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NSTextCheckingResult* match = matches.firstObject;
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NSRange formTypeRange = [match rangeAtIndex:2];
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NSRange typeRange = [match rangeAtIndex:3];
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NSRange indexRange = [match rangeAtIndex:5];
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NSRange extractionCommandRange = [match rangeAtIndex:6];
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if(formTypeRange.location != NSNotFound)
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parsedQuery[@"formType"] = [query substringWithRange:formTypeRange];
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else
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parsedQuery[@"formType"] = @"*";
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if(typeRange.location != NSNotFound)
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parsedQuery[@"type"] = [query substringWithRange:typeRange];
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else
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parsedQuery[@"type"] = @"*";
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if(indexRange.location != NSNotFound)
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parsedQuery[@"index"] = [NSNumber numberWithUnsignedInteger:(NSUInteger)[[query substringWithRange:indexRange] longLongValue]];
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if(extractionCommandRange.location != NSNotFound)
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{
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NSString* extractionCommand = [query substringWithRange:extractionCommandRange];
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parsedQuery[@"extractionCommand"] = [extractionCommand substringToIndex:1];
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parsedQuery[@"var"] = [extractionCommand substringFromIndex:1];
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}
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//process query
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if(!([@"*" isEqualToString:parsedQuery[@"formType"]] || (self.formType != nil && [self.formType isEqualToString:parsedQuery[@"formType"]])))
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return nil;
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if(!([@"*" isEqualToString:parsedQuery[@"type"]] || (self.type != nil && [self.type isEqualToString:parsedQuery[@"type"]])))
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return nil;
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//handle non-item dataforms and queries with index out of bounds as nil result of our query
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if(parsedQuery[@"index"] != nil)
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{
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if(![self check:@"item"])
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return nil;
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if([self count] < [parsedQuery[@"index"] unsignedIntegerValue])
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return nil;
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}
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if([parsedQuery[@"extractionCommand"] isEqualToString:@"@"])
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{
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if(parsedQuery[@"index"] != nil)
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return self[[parsedQuery[@"index"] unsignedIntegerValue]][parsedQuery[@"var"]];
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return self[parsedQuery[@"var"]];
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}
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if([parsedQuery[@"extractionCommand"] isEqualToString:@"&"])
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{
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if(parsedQuery[@"index"] != nil)
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return [self getField:parsedQuery[@"var"] atIndex:parsedQuery[@"index"]];
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return [self getField:parsedQuery[@"var"]];
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}
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return self; //we did not use any extraction command, but filtered by formType and type only
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}
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-(NSString*) description
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{
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NSMutableDictionary* dict = [NSMutableDictionary new];
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for(NSString* key in [self allKeys])
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dict[key] = [self getField:key];
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return [NSString stringWithFormat:@"XMPPDataForm%@%@ %@",
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self.type ? [NSString stringWithFormat:@"[%@]", self.type] : @"",
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self.formType ? [NSString stringWithFormat:@"{%@}", self.formType] : @"",
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dict
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];
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}
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//*** NSArray interface below (only indexed subscript parts)
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-(id) objectAtIndexedSubscript:(NSInteger) idx
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{
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NSArray<MLXMLNode*>* items = [self find:@"item"];
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if(items[idx] == nil)
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return nil;
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NSMutableDictionary* retval = [NSMutableDictionary new];
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for(MLXMLNode* fieldNode in [items[idx] find:@"field"])
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retval[[NSString stringWithFormat:@"%@", [fieldNode findFirst:@"/@var"]]] = [NSString stringWithFormat:@"%@", [fieldNode findFirst:@"value#"]];
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return [retval copy]; //immutable copy
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}
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-(void) setObject:(id _Nullable) obj atIndexedSubscript:(NSInteger) idx
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{
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NSArray<MLXMLNode*>* items = [self find:@"item"];
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//remove whole item if nil was given
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if(obj == nil)
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{
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[self removeChildNode:items[idx]];
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[self invalidateUpstreamCache]; //make sure future queries accurately reflect this change
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return;
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}
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MLAssert([obj isKindOfClass:[NSDictionary class]], @"LHS number subscripts into a XMPPDataForm MUST have a NSDictionary on the RHS side!", (@{
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@"index": @(idx),
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@"obj": nilWrapper(obj),
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}));
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//remove all present fields nodes first
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for(MLXMLNode* fieldNode in [items[idx] find:@"field"])
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[items[idx] removeChildNode:fieldNode];
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//then create new field nodes as specified
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NSDictionary* fields = (NSDictionary*)obj;
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for(NSString* name in fields)
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[items[idx] addChildNode:[[MLXMLNode alloc] initWithElement:@"field" withAttributes:@{@"var": name} andChildren:@[
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[[MLXMLNode alloc] initWithElement:@"value" withAttributes:@{} andChildren:@[] andData:fields[name]]
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] andData:nil]];
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[self invalidateUpstreamCache]; //make sure future queries accurately reflect this change
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}
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//*** NSMutableDictionary interface below
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-(id _Nullable) objectForKeyedSubscript:(NSString* _Nonnull) key
|
||
|
|
{
|
||
|
|
MLXMLNode* firstItem = [self findFirst:@"item"];
|
||
|
|
if(firstItem == nil)
|
||
|
|
firstItem = self;
|
||
|
|
return [firstItem findFirst:@"field<var=%@>/value#", key];
|
||
|
|
}
|
||
|
|
|
||
|
|
-(void) setObject:(id _Nullable) obj forKeyedSubscript:(NSString*) key
|
||
|
|
{
|
||
|
|
MLXMLNode* firstItem = [self findFirst:@"item"];
|
||
|
|
if(firstItem == nil)
|
||
|
|
firstItem = self;
|
||
|
|
if(!obj)
|
||
|
|
{
|
||
|
|
[firstItem removeChildNode:[firstItem findFirst:@"field<var=%@>", key]];
|
||
|
|
[self invalidateUpstreamCache]; //make sure future queries accurately reflect this change
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
MLXMLNode* fieldNode;
|
||
|
|
fieldNode = [firstItem findFirst:@"field<var=%@>", key];
|
||
|
|
if(!fieldNode)
|
||
|
|
{
|
||
|
|
[self setField:key withValue:[NSString stringWithFormat:@"%@", obj] atIndex:(firstItem != nil ? 0 : nil)];
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
MLXMLNode* valueNode = [fieldNode findFirst:@"value"];
|
||
|
|
if(!valueNode)
|
||
|
|
[fieldNode addChildNode:[[MLXMLNode alloc] initWithElement:@"value" withAttributes:@{} andChildren:@[] andData:[NSString stringWithFormat:@"%@", obj]]];
|
||
|
|
else
|
||
|
|
valueNode.data = [NSString stringWithFormat:@"%@", obj];
|
||
|
|
[self invalidateUpstreamCache]; //make sure future queries accurately reflect this change
|
||
|
|
}
|
||
|
|
|
||
|
|
//for multi-item forms it will only return the list of var names of the first item
|
||
|
|
//(as according to XEP-0004 all items should have the same set of field nodes --> this should contain all var names possible in any item)
|
||
|
|
-(NSArray*) allKeys
|
||
|
|
{
|
||
|
|
MLXMLNode* firstItem = [self findFirst:@"item"];
|
||
|
|
if(firstItem == nil)
|
||
|
|
firstItem = self;
|
||
|
|
return [firstItem find:@"field@var"];
|
||
|
|
}
|
||
|
|
|
||
|
|
-(NSArray*) allValues
|
||
|
|
{
|
||
|
|
MLXMLNode* firstItem = [self findFirst:@"item"];
|
||
|
|
if(firstItem == nil)
|
||
|
|
firstItem = self;
|
||
|
|
return [firstItem find:@"field/value#"];
|
||
|
|
}
|
||
|
|
|
||
|
|
//will return the count of items for a multi-item form and the count of vars otherwise
|
||
|
|
-(NSUInteger) count
|
||
|
|
{
|
||
|
|
if([self check:@"item"])
|
||
|
|
return [[self find:@"item"] count];
|
||
|
|
return [[self allKeys] count];
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
-(NSArray*) allKeysForObject:(id) anObject
|
||
|
|
{
|
||
|
|
NSMutableArray* retval = [NSMutableArray new];
|
||
|
|
MLXMLNode* firstItem = [self findFirst:@"item"];
|
||
|
|
for(MLXMLNode* field in (firstItem != nil ? [firstItem find:@"field"] : [self find:@"field"]))
|
||
|
|
if([anObject isEqual:[field findFirst:@"value#"]])
|
||
|
|
[retval addObject:[field findFirst:@"/@var"]];
|
||
|
|
return retval;
|
||
|
|
}
|
||
|
|
|
||
|
|
-(id) valueForKey:(NSString*) key
|
||
|
|
{
|
||
|
|
MLXMLNode* firstItem = [self findFirst:@"item"];
|
||
|
|
if(firstItem == nil)
|
||
|
|
firstItem = self;
|
||
|
|
return [firstItem findFirst:@"field<var=%@>/value#", key];
|
||
|
|
}
|
||
|
|
|
||
|
|
-(id) objectForKey:(NSString*) key
|
||
|
|
{
|
||
|
|
return [self valueForKey:key];
|
||
|
|
}
|
||
|
|
|
||
|
|
-(void) removeObjectForKey:(NSString*) key
|
||
|
|
{
|
||
|
|
[self removeField:key atIndex:([self check:@"item"] ? 0 : nil)];
|
||
|
|
}
|
||
|
|
|
||
|
|
-(void) removeAllObjects
|
||
|
|
{
|
||
|
|
MLXMLNode* firstItem = [self findFirst:@"item"];
|
||
|
|
if(firstItem == nil)
|
||
|
|
firstItem = self;
|
||
|
|
for(MLXMLNode* child in [firstItem find:@"field"])
|
||
|
|
[firstItem removeChildNode:child];
|
||
|
|
[self invalidateUpstreamCache]; //make sure future queries accurately reflect this change
|
||
|
|
}
|
||
|
|
|
||
|
|
-(void) removeObjectsForKeys:(NSArray*) keyArray
|
||
|
|
{
|
||
|
|
for(NSString* key in keyArray)
|
||
|
|
[self removeObjectForKey:key];
|
||
|
|
}
|
||
|
|
|
||
|
|
-(void) setObject:(NSString*) value forKey:(NSString*) key
|
||
|
|
{
|
||
|
|
[self setField:key withValue:value atIndex:([self check:@"item"] ? 0 : nil)];
|
||
|
|
}
|
||
|
|
|
||
|
|
-(void) setValue:(NSString* _Nullable) value forKey:(NSString*) key
|
||
|
|
{
|
||
|
|
if(!value)
|
||
|
|
[self removeObjectForKey:key];
|
||
|
|
else
|
||
|
|
[self setObject:value forKey:key];
|
||
|
|
}
|
||
|
|
|
||
|
|
-(void) addEntriesFromDictionary:(NSDictionary*) vars
|
||
|
|
{
|
||
|
|
for(NSString* key in vars)
|
||
|
|
{
|
||
|
|
if([vars[key] isKindOfClass:[NSDictionary class]])
|
||
|
|
[self setFieldWithDictionary:vars[key] atIndex:([self check:@"item"] ? 0 : nil)];
|
||
|
|
else
|
||
|
|
self[key] = vars[key];
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
-(void) setDictionary:(NSDictionary*) vars
|
||
|
|
{
|
||
|
|
[self removeAllObjects];
|
||
|
|
[self addEntriesFromDictionary:vars];
|
||
|
|
}
|
||
|
|
|
||
|
|
@end
|