From: Harishankar <v.harishankar@gmail.com>
Date: Fri, 22 May 2020 09:32:09 +0000 (+0530)
Subject: Program now takes options instead of hardcoded inputs
X-Git-Url: https://harishankar.org/repos/?a=commitdiff_plain;h=c3f6c1be3a72da00b32eef61b9a4a381a76880eb;p=biaweb2.git

Program now takes options instead of hardcoded inputs
Used getopt() to take command line option for the source,
destination path and also template directory from the end user
---

diff --git a/biaweb.cpp b/biaweb.cpp
index d0c284e..8e87ab8 100644
--- a/biaweb.cpp
+++ b/biaweb.cpp
@@ -1,23 +1,7 @@
-#include <iostream>
-#include <fstream>
-#include <getopt.h>
-#include "biawebdocumenttree.hpp"
-using namespace biaweb;
-
-int main (int argc, char *argv[]) {
-    // Compute the speed of generating the document tree and output HTML from sources
-    std::chrono::steady_clock::time_point t1 (std::chrono::steady_clock::now());
-
-    // An empty document tree
-    std::unique_ptr<DocumentTree> tree (new DocumentTree ("")); 
-    tree.get()->document_tree_builder ("Test/Reviews");
-    std::cout << VISUALIZE_TREE << std::endl;
-    tree.get()->visualize_tree ();
-    Template tpl ("templates");
-    tree.get()->create_tree_html (&tpl, "Test/Out");
-    std::chrono::steady_clock::time_point t2 (std::chrono::steady_clock::now());
-    std::chrono::duration<double> dur (t2 - t1);
-    std::cout << GENERATED_IN << dur.count () << std::endl;
-
-    return 0;
-}
+#include "biawebmain.hpp"
+#include <unistd.h>
+using namespace biaweb; 
+int main (int argc, char **argv) {
+    Main prog (argc, argv);
+    return prog.run ();
+}
\ No newline at end of file
diff --git a/biawebmain.hpp b/biawebmain.hpp
new file mode 100644
index 0000000..d96dbb0
--- /dev/null
+++ b/biawebmain.hpp
@@ -0,0 +1,99 @@
+#ifndef __BIAWEBMAIN__
+#define __BIAWEBMAIN__
+#include <unistd.h>
+#include <chrono>
+#include "biawebdocumenttree.hpp"
+#include "biawebstrings.hpp"
+namespace biaweb { 
+    // Class to parse the command line options and run DocumentTree
+    class Main {
+      private:
+        bool quiet_mode;
+        bool display_usage;
+        std::string app_name; 
+        std::string target_dir;
+        std::string template_dir;
+        std::string source_dir;
+
+      public:
+        // main constructor - build options from command line
+        Main (int argc, char **argv) ;
+
+        // run the program with the options built from constructor 
+        // and return the result
+        int run ();
+    };
+
+    // Execute the program and return the result
+    int Main::run () {
+        // if usage of the program is to be displayed then display it and quit
+        if (this->display_usage == true ) {
+            std::cerr << PROGRAM_USAGE;
+            std::cerr << this->app_name << " " << PROGRAM_ARGS << std::endl;
+            std::cerr << PROGRAM_EXPLANATION << std::endl;
+            return 1;
+        }
+        // else run the program
+        else {
+            // timing for the program
+            std::chrono::time_point<std::chrono::steady_clock> t1 
+                            (std::chrono::steady_clock::now());
+
+            // create a blank document tree and build the tree from source dir
+            std::unique_ptr<DocumentTree> doctree (new DocumentTree(""));
+            doctree.get()->document_tree_builder (this->source_dir);
+            // if not quiet mode, display the tree visualization
+            if (! this->quiet_mode) {
+                std::cout << VISUALIZE_TREE << std::endl;
+                doctree.get()->visualize_tree (); 
+            }
+            // generate the template
+            Template t (this->template_dir);
+            doctree.get()->create_tree_html (&t, this->target_dir);
+
+            if (! this->quiet_mode)
+                std::cout << OUTPUT_IN << " " << this->target_dir << std::endl;
+            
+            // end time
+            std::chrono::time_point<std::chrono::steady_clock> t2 
+                            (std::chrono::steady_clock::now());
+            std::chrono::duration<double> dur (t2 - t1);
+            // display the execution time
+            if (! this->quiet_mode)
+                std::cout << GENERATED_IN << dur.count() << std::endl;
+        }
+        return 0;
+    }
+
+    // build the options from command line using getopt
+    Main::Main (int argc, char **argv) {
+        this->display_usage = true;
+        this->quiet_mode = false;
+        this->app_name = argv[0];
+        this->source_dir = "";
+        this->target_dir = "";
+        this->template_dir = "";
+        int c;
+
+        while ((c = getopt (argc, argv, "i:t:o:q")) != -1) {
+            switch (c) {
+                case 'i' : this->source_dir = optarg;
+                           break;
+                case 't' : this->template_dir = optarg;
+                           break;
+                case 'o' : this->target_dir = optarg;
+                           break;
+                case 'q' : this->quiet_mode = true;
+            }
+        }
+        // if the user has not given the required parameters then set to display usage
+        // mode
+        if (this->source_dir.empty () || this->target_dir.empty () 
+            || this->template_dir.empty ())
+            this->display_usage = true;
+        else 
+            this->display_usage = false;
+    }
+}
+
+#endif
diff --git a/biawebstrings.hpp b/biawebstrings.hpp
index 55f4177..a421ee2 100644
--- a/biawebstrings.hpp
+++ b/biawebstrings.hpp
@@ -7,7 +7,15 @@ namespace biaweb {
     const char* NO_SUCH_PATH_ERROR = "No such path! Specify an existing file path" ;
     const char* DATE_IN_FORMAT = "%Y-%m-%d %H:%M %Z";
     const char* GENERATED_IN = "Generated in (s): ";
-    const char* VISUALIZE_TREE = "Generated document tree: ";
+    const char* VISUALIZE_TREE = "Document tree: ";
+    const char* PROGRAM_ARGS = " -i <inputdir> -o <outputdir> -t <templatedir>";
+    const char* OUTPUT_IN = "Output in: ";
+    const char* PROGRAM_USAGE = "Usage: ";
+    const char* PROGRAM_EXPLANATION = "Where \n \
+\t<inputdir>    - source directory tree with markdown sources\n \
+\t<outputdir>   - destination in which to create the HTML output\n \
+\t<templatedir> - directory containing the templates\n \
+NOTE: directory argument need not terminate with the separator (/)";
 
     // NAMED INDEX FOR DOCUMENT STRING BITS (LOADED FROM TEMPLATE FILE stringbits.txt)
     const unsigned int HOME = 0;