react-native-print/ios/RNPrint/RNPrint.m

//  Created by Christopher Dro on 9/4/15.

#import "RNPrint.h"
#import <React/RCTConvert.h>
#import <React/RCTUtils.h>

@implementation RNPrint

- (dispatch_queue_t)methodQueue
{
    return dispatch_get_main_queue();
}

RCT_EXPORT_MODULE();

RCT_EXPORT_METHOD(print:(NSDictionary *)options
                  resolver:(RCTPromiseResolveBlock)resolve
                  rejecter:(RCTPromiseRejectBlock)reject) {
    
    if (options[@"filePath"]){
        _filePath = [RCTConvert NSString:options[@"filePath"]];
    }
    
    if (options[@"html"]){
        _htmlString = [RCTConvert NSString:options[@"html"]];
    }
    
    if (options[@"printerURL"]){
        _printerURL = [NSURL URLWithString:[RCTConvert NSString:options[@"printerURL"]]];
        _pickedPrinter = [UIPrinter printerWithURL:_printerURL];
    }
    
    if(options[@"isLandscape"]) {
        _isLandscape = [[RCTConvert NSNumber:options[@"isLandscape"]] boolValue];
    }
    
    if ((_filePath && _htmlString) || (_filePath == nil && _htmlString == nil)) {
        reject(RCTErrorUnspecified, nil, RCTErrorWithMessage(@"Must provide either `html` or `filePath`. Both are either missing or passed together"));
    }
    
    NSData *printData;
    BOOL isValidURL = NO;
    NSURL *candidateURL = [NSURL URLWithString: _filePath];
    if (candidateURL && candidateURL.scheme && candidateURL.host)
        isValidURL = YES;
    
    if (isValidURL) {
        // TODO: This needs updated to use NSURLSession dataTaskWithURL:completionHandler:
        printData = [NSData dataWithContentsOfURL:candidateURL];
    } else {
        printData = [NSData dataWithContentsOfFile: _filePath];
    }
    
    UIPrintInteractionController *printInteractionController = [UIPrintInteractionController sharedPrintController];
    printInteractionController.delegate = self;
    
    // Create printing info
    UIPrintInfo *printInfo = [UIPrintInfo printInfo];
    
    printInfo.outputType = UIPrintInfoOutputGeneral;
    printInfo.jobName = [_filePath lastPathComponent];
    printInfo.duplex = UIPrintInfoDuplexLongEdge;
    printInfo.orientation = _isLandscape? UIPrintInfoOrientationLandscape: UIPrintInfoOrientationPortrait;
    
    printInteractionController.printInfo = printInfo;
    printInteractionController.showsPageRange = YES;
    
    if (_htmlString) {
        UIMarkupTextPrintFormatter *formatter = [[UIMarkupTextPrintFormatter alloc] initWithMarkupText:_htmlString];
        printInteractionController.printFormatter = formatter;
    } else {
        printInteractionController.printingItem = printData;
    }
    
    // Completion handler
    void (^completionHandler)(UIPrintInteractionController *, BOOL, NSError *) =
    ^(UIPrintInteractionController *printController, BOOL completed, NSError *error) {
        if (!completed && error) {
            NSLog(@"Printing could not complete because of error: %@", error);
            reject(RCTErrorUnspecified, nil, RCTErrorWithMessage(error.description));
        } else {
            resolve(completed ? printInfo.jobName : nil);
        }
    };
    
    if (_pickedPrinter) {
        [printInteractionController printToPrinter:_pickedPrinter completionHandler:completionHandler];
    } else {
        [printInteractionController presentAnimated:YES completionHandler:completionHandler];
    }
}


RCT_EXPORT_METHOD(selectPrinter:(RCTPromiseResolveBlock)resolve
                  rejecter:(RCTPromiseRejectBlock)reject) {
    
    UIPrinterPickerController *printPicker = [UIPrinterPickerController printerPickerControllerWithInitiallySelectedPrinter: _pickedPrinter];
    
    printPicker.delegate = self;
    
    [printPicker presentAnimated:YES completionHandler:
     ^(UIPrinterPickerController *printerPicker, BOOL userDidSelect, NSError *error) {
         if (!userDidSelect && error) {
             NSLog(@"Printing could not complete because of error: %@", error);
             reject(RCTErrorUnspecified, nil, RCTErrorWithMessage(error.description));
         } else {
             [UIPrinterPickerController printerPickerControllerWithInitiallySelectedPrinter:printerPicker.selectedPrinter];
             if (userDidSelect) {
                 _pickedPrinter = printerPicker.selectedPrinter;
                 NSDictionary *printerDetails = @{
                                                  @"name" : _pickedPrinter.displayName,
                                                  @"url" : _pickedPrinter.URL.absoluteString,
                                                  };
                 resolve(printerDetails);
             }
         }
     }];
}

#pragma mark - UIPrintInteractionControllerDelegate

-(UIViewController*)printInteractionControllerParentViewController:(UIPrintInteractionController*)printInteractionController  {
    UIViewController *result = [[[[UIApplication sharedApplication] delegate] window] rootViewController];
    while (result.presentedViewController) {
        result = result.presentedViewController;
    }
    return result;
}

-(void)printInteractionControllerWillDismissPrinterOptions:(UIPrintInteractionController*)printInteractionController {}

-(void)printInteractionControllerDidDismissPrinterOptions:(UIPrintInteractionController*)printInteractionController {}

-(void)printInteractionControllerWillPresentPrinterOptions:(UIPrintInteractionController*)printInteractionController {}

-(void)printInteractionControllerDidPresentPrinterOptions:(UIPrintInteractionController*)printInteractionController {}

-(void)printInteractionControllerWillStartJob:(UIPrintInteractionController*)printInteractionController {}

-(void)printInteractionControllerDidFinishJob:(UIPrintInteractionController*)printInteractionController {}

@end