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To add a new type of log file: 1) Add a new enumeration definition for the file in LogManager.h 2) Add an entry for that new enumeration in the flagToPath() function right below the enumeration definion.
83 lines
3.1 KiB
C++
83 lines
3.1 KiB
C++
#include "LogManager.h"
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#define TMPBREAK "<!!line-break!!>"
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//Overall check/creation of the log directory
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void LogManager::checkLogDir(){
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// - TO-DO
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}
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//Main Log write function (all the overloaded versions end up calling this one)
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void LogManager::log(QString file, QStringList msgs, QDateTime time){
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if(file.isEmpty()){ return; }
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QFile LOG(file);
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if( !LOG.open(QIODevice::WriteOnly, QIODevice::Append) ){ return; } //error writing to file
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QTextStream str(&LOG);
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for(int i=0; i<msgs.length(); i++){
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msgs[i].replace("\n",TMPBREAK);
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str << "["+time.toString(Qt::ISODate)+"]"+msgs[i]+"\n";
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}
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LOG.close();
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}
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//Main Log read function (all the overloaded versions end up calling this one)
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QStringList LogManager::readLog(QString file, QDateTime starttime, QDateTime endtime){
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//Read the whole file into memory as quickly as possible
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QStringList all;
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QFile LOG(file);
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if( !LOG.open(QIODevice::ReadOnly) ){ return QStringList(); } //error opening file
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QTextStream str(&LOG);
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all = str.readAll().split("\n");
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LOG.close();
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//Now filter out the entries outside the requested range of timestamps
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// - start at the beginning and check starttime
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while( !all.isEmpty() ){
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if( starttime <= QDateTime::fromString( all.first().section("]",0,0).section("[",1,1), Qt::ISODate) ){
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break;
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}else{
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all.removeAt(0);
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}
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}
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// - now check the end and work backwards for endtime
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while( !all.isEmpty() ){
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if( endtime > QDateTime::fromString( all.first().section("]",0,0).section("[",1,1), Qt::ISODate) ){
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break;
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}else{
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all.removeAt(all.length()-1);
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}
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}
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// - now double check that none of the temporary line break replacements get through
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for(int i=0; i<all.length(); i++){
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if(all[i].contains(TMPBREAK)){ all[i].replace(TMPBREAK,"\n"); }
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}
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return all;
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}
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QStringList LogManager::readLog(LogManager::LOG_FILE file, QDateTime starttime, QDateTime endtime){
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//First get a list of all the various log files which encompass this time range
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QDir logdir(LOGDIR);
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// - get list of all this type of log
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QStringList files = logdir.entryList(QStringList() << flagToPath(file).arg("*"), QDir::Files, QDir::Name);
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// - filter out the dates we need (earlier first)
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QString tmp = flagToPath(file).arg(starttime.date().toString(Qt::ISODate));
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while(!files.isEmpty()){
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//Note we can do basic compare due to identical filenames *except* for some numbers near the end
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if( QString::compare(files[0], tmp)<0 ){ files.removeAt(0); }
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else{ break; }
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}
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// - now filter out any later dates than we need
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if(endtime.date() < QDate::currentDate()){
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tmp = flagToPath(file).arg(endtime.date().toString(Qt::ISODate));
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while(!files.isEmpty()){
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//Note we can do basic compare due to identical filenames *except* for some numbers near the end
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if( QString::compare(files.last(), tmp)>0 ){ files.removeAt(files.length()-1); }
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else{ break; }
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}
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}
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//Now load each file in order (oldest->newest) and filter out the necessary logs
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QStringList logs;
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for(int i=0; i<files.length(); i++){
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logs << readLog(LOGDIR+"/"+files[i], starttime, endtime);
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}
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return logs;
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} |