From cb2b7de4b3b322398a12a9f4cdcb9416c881c486 Mon Sep 17 00:00:00 2001
From: Martin Brodbeck <martin@brodbeck-online.de>
Date: Thu, 9 Mar 2023 15:21:26 +0100
Subject: [PATCH] basic usage now possible

---
 main.cpp | 83 ++++++++++++++++++++++++++++++++++++++++++++++++++++----
 1 file changed, 77 insertions(+), 6 deletions(-)

diff --git a/main.cpp b/main.cpp
index 0fd0cab..0b0cdd5 100644
--- a/main.cpp
+++ b/main.cpp
@@ -1,36 +1,107 @@
+#include <algorithm>
+#include <filesystem>
 #include <fstream>
 #include <iostream>
+#include <locale>
+#include <random>
 #include <string>
+#include <vector>
 
 #include <boost/program_options.hpp>
 
+#include <unicode/unistr.h>
+#include <unicode/ustream.h>
+
 namespace po = boost::program_options;
 
 int main(int argc, char *argv[])
 {
     std::string letters;
+    int wordLengthMin{1};
+    int wordLengthMax{1024};
+    int lineLength{60};
+    int numLines{4};
+    std::string wordsFile{"/usr/share/dict/ngerman"};
+    bool lowercase{false};
 
     po::options_description desc("Erlaubte Optionen");
-    desc.add_options()("help,h", "Ausgabe der Hilfe")("letters,l", po::value<std::string>(&letters),
-                                                      "Enthaltene Buchstaben");
+    desc.add_options()("help,h", "Ausgabe der Hilfe")(
+        "characters,c", po::value<std::string>(&letters), "Enthaltene Buchstaben")(
+        "min-length", po::value<int>(&wordLengthMin),
+        "Minimale Wortlänge")("max-length", po::value<int>(&wordLengthMax), "Maximale Wortlänge")(
+        "line-length", po::value<int>(&lineLength),
+        "Maximale Zeilenlänge")("num-lines,n", po::value<int>(&numLines), "Anzahl Zeilen")(
+        "lowercase", po::bool_switch(&lowercase), "Ausgabe nur klein geschrieben")(
+        "dictfile,d", po::value<std::string>(&wordsFile), "Pfad zur Wörterbuchdatei");
 
     po::variables_map vm;
     po::store(po::parse_command_line(argc, argv, desc), vm);
     po::notify(vm);
 
-    if (vm.count("help")) {
+    if (vm.contains("help")) {
         std::cout << desc << std::endl;
         return 1;
     }
 
-    std::ifstream infile("../wortliste.txt");
+    std::ifstream infile(wordsFile);
     std::string line;
-
+    icu::UnicodeString uline;
+    std::vector<icu::UnicodeString> words;
+    icu::UnicodeString ucLetters = icu::UnicodeString::fromUTF8(letters);
+    icu::UnicodeString ucLettersUpper = icu::UnicodeString::fromUTF8(letters).toUpper();
     long counter{0};
 
+    if (!std::filesystem::exists(wordsFile)) {
+        std::cerr << "Datei existiert nicht: " << wordsFile << std::endl;
+        return 1;
+    }
+
     while (std::getline(infile, line)) {
+        uline = icu::UnicodeString::fromUTF8(line);
+        int length = uline.length();
+
+        if (length < wordLengthMin || length > wordLengthMax)
+            continue;
+
+        if (ucLetters.length() > 0) {
+            bool valid = true;
+            for (int i{0}; i < uline.length(); i++) {
+                auto ch = uline.charAt(i);
+                if (ucLetters.indexOf(ch) == -1 && ucLettersUpper.indexOf(ch) == -1) {
+                    valid = false;
+                    break;
+                }
+            }
+            if (!valid)
+                continue;
+        }
+        if (lowercase) {
+            uline.toLower();
+        }
+
+        words.push_back(uline);
         counter++;
     }
 
-    std::cout << "Anzahl: " << counter << std::endl;
+    std::cout << "Anzahl infrage kommender Wörter: " << counter << "\n" << std::endl;
+
+    std::random_device rdev;
+    std::mt19937 rng(rdev());
+    std::uniform_int_distribution<std::mt19937::result_type> distrib(0, words.size() - 1);
+    for (int i{0}; i < numLines; i++) {
+        icu::UnicodeString lectionLine;
+        while (lectionLine.length() < lineLength) {
+            if (lectionLine.isEmpty())
+                lectionLine.append(words.at(distrib(rng)));
+            else
+                lectionLine.append(" " + words.at(distrib(rng)));
+        }
+
+        if (lectionLine.length() > lineLength) {
+            lectionLine.retainBetween(0, lectionLine.lastIndexOf(" ") + 1);
+            lectionLine.trim();
+        }
+
+        std::cout << lectionLine << std::endl;
+    }
 }
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