From 36b3422daed37549e405ed4a5bb37b601012ca21 Mon Sep 17 00:00:00 2001
From: Maël Gassmann <mael.gassmann@students.bfh.ch>
Date: Wed, 2 Mar 2022 14:37:17 +0100
Subject: [+] Now ordering posts by date, possiblity to show a limited number
 of posts, date now prints the date

---
 inc/FileAssembler.h | 53 ++++++++++++++++++++++++++++++++++++++++++++++++++++-
 1 file changed, 52 insertions(+), 1 deletion(-)

(limited to 'inc')

diff --git a/inc/FileAssembler.h b/inc/FileAssembler.h
index 3eaab35..1a37207 100644
--- a/inc/FileAssembler.h
+++ b/inc/FileAssembler.h
@@ -4,6 +4,7 @@
 #include <iostream>
 #include <string.h>
 #include <cctype>
+#include <vector>
 #include <list>
 #include <map>
 #include <regex>
@@ -17,6 +18,7 @@ private:
   map<string, string> variables;
   map<string, string> templates;
   map<string, string> pages;
+  vector<string> ordered_posts_indexes;
   map<string, string> posts;
   list<string> cached_res;
 
@@ -24,7 +26,56 @@ private:
   void parse_variables();
   map<string, string> assemble_from_iterator(map<string, string>::iterator it, map<string, string>::iterator end, bool is_post);
   string parse(string title, string content, bool is_post);
-  string parse_arg(string arg_name, string to_parse);
+  static string parse_arg(string to_parse){
+  	static std::regex rgx("\\w+\\((.*)\\)");
+	std::smatch match;
+	if (std::regex_search(to_parse, match, rgx))
+		return match[1];
+	return "";
+  }
+  vector<string> get_ordered_posts_indexes(){
+	vector<pair<string,string>> ordered_posts;
+    	for (auto& it : posts) {
+        	ordered_posts.push_back(it);
+    	}
+    	sort(ordered_posts.begin(), ordered_posts.end(), cmp_posts);
+
+	vector<string> titles;
+	transform(ordered_posts.begin(), ordered_posts.end(), std::back_inserter(titles), 
+               [](const std::pair<string, string>& p) { return p.first; });
+	return titles;
+  }
+  static bool cmp_posts(pair<string, string>& a, pair<string, string>& b){
+	string a_date = parse_arg(a.second);
+	string b_date = parse_arg(b.second);
+	if(a_date == ""){
+		cerr << "Error: swg: Variable 'date' of post '" << a.first << "' is not defined." << endl;
+		exit(5);
+	}else if (b_date == ""){
+		cerr << "Error: swg: Variable 'date' of post '" << b.first << "' is not defined." << endl;
+		exit(5);
+	}
+  	static std::regex rgx("(\\d{1,2})\\.(\\d{1,2})\\.(\\d{4})");
+	std::smatch a_match;
+	std::smatch b_match;
+	if (std::regex_search(a_date, a_match, rgx)){ // For now only european swiss format handled
+		if (std::regex_search(b_date, b_match, rgx)){ // For now only european swiss format handled
+			if(a_match[3] != b_match[3]) // Trying to differentiate by year
+				return stoi(a_match[3]) > stoi(b_match[3]);
+			if(a_match[2] != b_match[2]) // Trying to differentiate by month
+				return stoi(a_match[2]) > stoi(b_match[2]);
+			if(a_match[1] != b_match[1]) // Trying to differentiate by day
+				return stoi(a_match[1]) > stoi(b_match[1]);
+			return false; // or if equal return false
+		}else{
+			cerr << "Error: swg: Variable 'date' of post '" << b.first << "' is not following the format dd.mm.yyyy." << endl;
+			exit(5);
+		}
+	}else{
+		cerr << "Error: swg: Variable 'date' of post '" << a.first << "' is not following the format dd.mm.yyyy." << endl;
+		exit(5);
+	}
+  }
 
 public:
   FileAssembler(string path);
-- 
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