初步支持从apt源获取数据（暂不可用）

aptpkginfo.cpp

@@ -1,11 +1,86 @@
 #include "aptpkginfo.h"
+#include <QFile>
+#include <QDir>
+#include <QDebug>
 
-AptPkgInfo::AptPkgInfo()
+AptPkgInfo::AptPkgInfo(QString pkgName)
 {
-
+    SetPkgName(pkgName);
+    ReadAptData();
 }
 
-QStringList AptPkgInfo::GetAptPackageList(QString name)
+void AptPkgInfo::ReadAptData()
+{
+    this->aptData = "";
+    QDir dir("/var/lib/apt/lists/");
+    QStringList list = dir.entryList();
+    for(QString i: list) {
+        // 除去 . 和 ..
+        if(i == "." || i == "..") {
+            continue;
+        }
+        // TODO: bug
+        if(i.mid(-10, -1) != "_Packages") {
+            continue;
+        }
+        QFile file(dir.path() + "/" + i);
+        file.open(QFile::ReadOnly);
+        aptData += file.readAll() + "\n";
+        file.close();
+    }
+    qDebug() << aptData;
+}
+
+void AptPkgInfo::SetPkgName(QString pkgName)
+{
+    this->pkgName = pkgName;
+    pkgInfo = GetPkgInfo(pkgName);
+}
+
+QString AptPkgInfo::GetPkgInfo(QString pkgName) const
+{
+    if(pkgName == NULL) {
+        pkgName = this->pkgName;
+    }
+    QProcessEnvironment env = QProcessEnvironment::systemEnvironment();
+    env.insert("LANG", "en");
+    return this->GetCommandResult("apt", QStringList() << "list" << pkgName, env);
+}
+
+QString AptPkgInfo::get_package() const
+{
+    QStringList list = pkgInfo.split("\n");
+    for(QString i: list) {
+        if(i.contains("Package: ")) {
+            return i.replace("Package: ", "").replace(" ", "");
+        }
+    }
+    return NULL;
+}
+
+QString AptPkgInfo::get_version() const
+{
+    QStringList list = pkgInfo.split("\n");
+    for(QString i: list) {
+        if(i.contains("Maintainer: ")) {
+            return i.replace("Maintainer: ", "").replace(" ", "");
+        }
+    }
+    return NULL;
+}
+
+QString AptPkgInfo::get_maintainer() const
+{
+    QStringList list = pkgInfo.split("\n");
+    for(QString i: list) {
+        if(i.contains("Version: ")) {
+            return i.replace("Version: ", "").replace(" ", "");
+        }
+    }
+    return NULL;
+}
+
+QStringList AptPkgInfo::GetAptPackageList(QString name) const
 {
     QProcessEnvironment env = QProcessEnvironment::systemEnvironment();
     env.insert("LANG", "en");
@@ -21,7 +96,7 @@ QStringList AptPkgInfo::GetAptPackageList(QString name)
     return result;
 }
 
-QByteArray AptPkgInfo::GetCommandResult(QString command, QStringList argv, QProcessEnvironment env)
+QByteArray AptPkgInfo::GetCommandResult(QString command, QStringList argv, QProcessEnvironment env) const
 {
     QProcess process;
     process.setProcessEnvironment(env);