I´m currently working on a little tool which analyses the usage of a group-chat in Whatsapp.
i´m trying to realize it with the whatsapp logfile. I managed it to format the raw .txt to the following format to work with the formated text:
29. Jan. 12:01 - Random Name: message text
29. Jan. 12:22 - Random Name: message text
29. Jan. 12:24 - Random Name: message text
29. Jan. 12:38 - Random Name: message text
29. Jan. 12:52 - Random Name: message text
so far, so good. The Problem is that there are a few floppy lines like:
29. Jan. 08:42 - Random Name2: message text 1
additional text of the message 1
29. Jan. 08:43 - Random Name2: message text 2
or even worse:
15. Jan. 14:00 - Random Name: First part of the message
second part
third part
forth part
fifth part
29. Jan. 08:43 - Random Name2: message text 2
I guess I need a kind of algorythm to solve this problem, but i´m pretty new in programming and can´t create such a complex algorithm.
The same problem in Python: parse a whatsApp conversation log
[EDIT]
This is my code which doesn´t work. (I know it´s pretty bad)
import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;
public class FormatList {
public static void main(String[] args) throws IOException {
// TODO Auto-generated method stub
FileReader fr = new FileReader("Whatsapp_formated.txt");
BufferedReader br = new BufferedReader(fr);
FileWriter fw = new FileWriter("Whatsapp_formated2.txt");
BufferedWriter ausgabe = new BufferedWriter(fw);
String line="";
String buffer="";
while((line = br.readLine())!=null)
{
System.out.println("\n"+line);
if(line.isEmpty())
{
}
else{
if(line.charAt(0)=='0'||line.charAt(0)=='1'||line.charAt(0)=='2'||line.charAt(0)=='3'||line.charAt(0)=='4'||line.charAt(0)=='5'||line.charAt(0)=='6'||line.charAt(0)=='7'||line.charAt(0)=='8'||line.charAt(0)=='9')
{
buffer = line;
}
else
{
buffer += line;
}
ausgabe.write(buffer);
ausgabe.newLine();
System.out.println(buffer);
}
ausgabe.close();
}
}
}
[EDIT 2]
In the end i want to read out the file and analyse each line:
29. Jan. 12:01 - Random Name: message text
I can tell when it was sent, who sent it and what/how much he wrote
If i now get the following line:
additional text of the message 1
I neither can tell when it was written nor who sent it
well, I came up with a solution for your problem, I believe, according to what I understood.
Given a file with this format:
29. Jan. 12:01 - Random Name: message text
29. Jan. 12:22 - Random Name: message text
29. Jan. 12:24 - Random Name: message text
29. Jan. 12:38 - Random Name: message text
29. Jan. 12:52 - Random Name: message text
29. Jan. 08:42 - Random Name2: message text 1
additional text of the message 1
29. Jan. 08:43 - Random Name2: message text 2
15. Jan. 14:00 - Random Name: First part of the message
second part
third part
forth part
fifth part
29. Jan. 08:43 - Random Name2: message text 2
(This is a file called "wsp.log" in my "data" folder. So the path to access to it is "data/wsp.log")
I expect something like this:
29. Jan. 12:01 - Random Name: message text
29. Jan. 12:22 - Random Name: message text
29. Jan. 12:24 - Random Name: message text
29. Jan. 12:38 - Random Name: message text
29. Jan. 12:52 - Random Name: message text
29. Jan. 08:42 - Random Name2: message text 1 additional text of the message 1
29. Jan. 08:43 - Random Name2: message text 2
15. Jan. 14:00 - Random Name: First part of the message second part third part forth part fifth part
29. Jan. 08:43 - Random Name2: message text 2
According to that, I implemented the following class:
public class LogReader {
public void processWspLogFile() throws IOException {
//a. I would reference to my file
File wspLogFile = new File("data/wsp.log");
//b. I would use the mechanism to read the file using BufferedReader
BufferedReader bufferedReader = new BufferedReader(new FileReader(wspLogFile));
String currLine = null;//This is the current line (like my cursor)
//This will hold the data of the file in String format
StringBuilder stringFormatter = new StringBuilder();
boolean firstIterationDone = false;//The first line will always contains the format, so I will always append it, from the second I will start making the checkings...
// Now I can use some regex (I'm not really good at this stuff, I just used a Web Page: http://txt2re.com/)
/* This regex will match the lines that contains the date in this format "29. Jan. 12:22", when I take a look at your file
I can see that the "additional text of the message" does not contains any date, so I can use that as my point of separation*/
String regex = "(\\d)(\\d)(\\.)(\\s+)([a-z])([a-z])([a-z])(\\.)(\\s+)(\\d)(\\d)(:)(\\d)(\\d)";
//As part of using regex, I would like to create a Pattern to make the lines on the list match this expression
Pattern wspLogDatePattern = Pattern.compile(regex, Pattern.CASE_INSENSITIVE | Pattern.DOTALL);
//Use of the line separator of the O.S
String lineSeparator = System.getProperty("line.separator");
while ((currLine = bufferedReader.readLine()) != null) {
if (!firstIterationDone) {
stringFormatter.append(currLine);
firstIterationDone = true;
} else {
Matcher wspLogDateMatcher = wspLogDatePattern.matcher(currLine);
//The first time we will check if the second line has the pattern, if it does, we append a line separator
if (wspLogDateMatcher.find()) {
//It is a "normal" line
stringFormatter.append(lineSeparator).append(currLine);
} else {
//But if it doesn't, we append it on the same line
stringFormatter.append(" ").append(currLine.trim());
}
}
}
System.out.println(stringFormatter.toString());
}
}
Which I will invoke this way:
public static void main(String[] args) throws IOException {
new LogReader().processWspLogFile();
}
Hope this can give you some idea or can be useful for your purposes. I know some improvements are needed, refactor is always needed for code :), but by now it can achieve the format expected. Happy coding :).