codewars #68 Predict your age! (7kyu)

Task

You are working for NoVirus Security Solutions and they ask you to make a scanner that scans a file inputted by the user with the function scanFile(File,VirusDB) that takes a File and a VirusDB object and return whether a file is safe or not. Remember: the searches need to be non-Case-Sensitive

Your class also has the function setScanIntensity(int) which changes the scan intensity. This will only receive values 0, 1, 2 or 3. This has been done for you.

The scan intensity determines the arrays from the database that will be used. i.e.:

scanIntensity 0 means off(every file is considered safe)

scanIntensity 1 means that only the array intensity1Signatures will be used

scanIntensity 2 means that the arrays intensity1Signatures and intensity2Signatures will be used

scanIntensity 3 means that all 3 arrays will be used

Outputs

The outputs should be: "Filename is safe" or "Filename is not safe" (Filename is the name of the file that you can get with file.getName() )

File Class

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class File{   private String name;   private String data;     public File(String name,String data){     this.name = name;     this.data = data;   }     //used in output   public String getName(){     return this.name;   }     //the String that you need to scan.   public String getData(){     return this.data;   } }

VirusDB Class

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class VirusDB{    private String[] intensity1Signatures;    private String[] intensity2Signatures;    private String[] intensity3Signatures;      public VirusDB(String[] intensity1Signatures,String[] intensity2Signatures,String[] intensity3Signatures){      this.intensity1Signatures = intensity1Signatures;      this.intensity2Signatures = intensity2Signatures;      this.intensity3Signatures = intensity3Signatures;    }      public String[] getSignatures(int arrayNum){      switch (arrayNum){        case 1:return this.intensity1Signatures;        case 2:return this.intensity2Signatures;        case 3:return this.intensity3Signatures;        default:return new String[0];      }    } }

Examples

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String[] intensity1signatures = new String[]{        "malware",        "virus",        "infect"      };        String[] intensity2signatures = new String[]{        "ransomware",        "trojan",        "trojanHorse",        "worm",        "spyware",        "keystrokelogger",        "adware",        "botnet",        "rootkit",      };        String[] intensity3signatures = new String[]{        "DeleteSys32",        "OverideMBR",        "EncryptAll",        "openrandomwebsite",        "openrandwebsite",        "sendalldata",        "recordKeyboard",        "recordmouse",        "destroy",        "overheat",        "getfullcontrol",        "uploadharddrive",        "uploadharddisk",        "overload",        "changeOS",        "encrypt",        "changeDesktop",        "ddos",        "dos",        "hide",        "inject",        "ransom",        "getcreditcardinfo",        "getpasswords",        "getpass",      };

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public class AntiVirus{       private int scanIntensity = 0;       //this method is ready for you.   public void setScanIntensity(int level){     scanIntensity = level;   }       //write this method.   public String scanFile(File file,VirusDB database){     String data = file.getData().toLowerCase();     for(int i = 0; i <= scanIntensity; i ++){         String [] signatures = database.getSignatures(i);         for (String signature : signatures) {               if(data.contains(signature))                   return file.getName() + " is not safe";         }      }        return file.getName() + " is safe";   }     }