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//
// WKWebViewHandleFactory.m
// Hybrid-framework
//
// Created by 王凯 on 2018/12/7.
// Copyright © 2018 王凯. All rights reserved.
//
#import "WKWebViewHandleFactory.h"
#import "WKMsgCommand.h"
#import "WKWebViewEngine.h"
#import <objc/message.h>
static const NSInteger JSON_SIZE_FOR_MAIN_THREAD = 4 * 1024; // Chosen arbitrarily.
@implementation WKWebViewHandleFactory {
__weak WKWebViewEngine *_webViewEngine;
NSDictionary *_commandDictionary;
}
- (instancetype)initWithWebViewEngine:(WKWebViewEngine *)webViewEngine {
if (self = [super init]) {
_webViewEngine = webViewEngine;
_commandDictionary = [NSDictionary dictionary];
}
return self;
}
- (void)handleMsgCommand:(NSString *)arguments {
[self handleCommand:arguments];
}
#pragma mark - handle
- (void)handleCommand:(NSString *)commandJson {
if (commandJson.length > 0) {
[self fetchCommands:commandJson];
[self executePending];
}
}
- (void)fetchCommands:(NSString *)command {
if ([command length] < JSON_SIZE_FOR_MAIN_THREAD) {
_commandDictionary = [self JSONObject:command];
} else {
dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^() {
self->_commandDictionary = [self JSONObject:command];
[self performSelectorOnMainThread:@selector(executePending) withObject:nil waitUntilDone:NO];
});
}
}
- (void)executePending {
if (_commandDictionary.allKeys.count > 0) {
WKMsgCommand *msgCommand = [WKMsgCommand commandFromJson:_commandDictionary];
NSLog(@"Exec(%@): Calling %@.%@", msgCommand.callbackId, msgCommand.className, msgCommand.methodName);
if (![self execute:msgCommand]) {
#ifdef DEBUG
NSString *commandJson = [NSString stringWithFormat:@"%@",_commandDictionary];
static NSUInteger maxLogLength = 1024;
NSString *commandString = ([commandJson length] > maxLogLength) ?
[NSString stringWithFormat : @"%@[...]", [commandJson substringToIndex:maxLogLength]] :
commandJson;
NSLog(@"FAILED pluginJSON = %@", commandString);
#endif
}
}
}
- (BOOL)execute:(WKMsgCommand *)command {
if (command.className == nil || command.methodName == nil) {
NSLog(@"ERROR: Classname and/or methodName not found for command.");
return NO;
}
BOOL retVal = YES;
double started = [[NSDate date] timeIntervalSince1970] * 1000.0;
WKBasePlugin *instance = [_webViewEngine.commandDelegate getCommandInstance:command.className];
if (!([instance isKindOfClass:[WKBasePlugin class]])) {
NSLog(@"ERROR: Plugin '%@' not found, or is not a Plugin. Check your plugin mapping in config.xml.", command.className);
return NO;
}
NSString* methodName = [NSString stringWithFormat:@"%@:", command.methodName];
SEL normalSelector = NSSelectorFromString(methodName);
if ([instance respondsToSelector:normalSelector]) {
((void (*)(id, SEL, id))objc_msgSend)(instance, normalSelector, command);
} else {
NSLog(@"ERROR: Method '%@' not defined in Plugin '%@'", methodName, command.className);
retVal = NO;
}
double elapsed = [[NSDate date] timeIntervalSince1970] * 1000.0 - started;
if (elapsed > 10) {
NSLog(@"THREAD WARNING: ['%@'] took '%f' ms. Plugin should use a background thread.", command.className, elapsed);
}
return retVal;
}
- (void)dealloc {
_webViewEngine = nil;
}
- (id)JSONObject:(NSString *)json
{
@autoreleasepool {
NSError* error = nil;
id object = [NSJSONSerialization JSONObjectWithData:[json dataUsingEncoding:NSUTF8StringEncoding]
options:NSJSONReadingMutableContainers
error:&error];
if (error != nil) {
NSLog(@"NSString JSONObject error: %@, Malformed Data: %@", [error localizedDescription], self);
}
return object;
}
}
@end