From 116eadbd6f7a06803f8bd522947d8e4fc382e6f3 Mon Sep 17 00:00:00 2001
From: Silvan Calarco <silvan.calarco@mambasoft.it>
Date: Fri, 31 May 2024 14:08:15 +0200
Subject: [PATCH] DistroqueryAPI: implementation of /get_repositories

---
 src/DistroqueryAPI.cpp | 94 ++++++++++++++++++++++++++++++++++++++++++
 src/DistroqueryAPI.hpp | 45 ++++++++++++++++++++
 src/distroquery.cpp    |  4 +-
 3 files changed, 141 insertions(+), 2 deletions(-)
 create mode 100644 src/DistroqueryAPI.cpp
 create mode 100644 src/DistroqueryAPI.hpp

diff --git a/src/DistroqueryAPI.cpp b/src/DistroqueryAPI.cpp
new file mode 100644
index 0000000..a8af246
--- /dev/null
+++ b/src/DistroqueryAPI.cpp
@@ -0,0 +1,94 @@
+/*
+ * distroquery_api - API for querying data generated by distromatic
+ *
+ * Copyright (C) 2024 by Silvan Calarco <silvan.calarco@mambasoft.it>
+ *
+ * This program is free software; you can redistribute it and/or modify it under
+ * the terms of version 2 of the GNU General Public License as published by the
+ * Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY, to the extent permitted by law; without even the implied
+ * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+ * See the GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program; if not, write to the Free Software Foundation, Inc.,
+ * 59 Temple Place, Suite 330, Boston, MA  02111-1307, USA.
+ */
+
+#include "DistroqueryAPI.hpp"
+
+vector<string> split(string str, string token) {
+    vector<string>result;
+    while(str.size()){
+        auto index = str.find(token);
+        if(index!=string::npos){
+            result.push_back(str.substr(0,index));
+            str = str.substr(index+token.size());
+            if(str.size()==0)result.push_back(str);
+        }else{
+            result.push_back(str);
+            str = "";
+        }
+    }
+    return result;
+}
+
+DistroqueryAPI::DistroqueryAPI(configTag* conf): config(conf) {
+}
+
+json DistroqueryAPI::configToJsonRepositories() {
+    json j;
+    j["repositories"] = {};
+    struct configTag *ct = config;
+    while (ct) {
+        json archs = {};
+        for (auto arch: ct->arch) {
+            if (arch == NULL) break;
+            archs.push_back(arch);
+        }
+        json parents = json::array();
+        for (auto parent: ct->repository) {
+            if (parent == NULL) break;
+            if (parent->tag != ct->tag) parents.push_back(parent->tag);
+        }
+        json repository = {
+            { "tag", ct->tag },
+            { "archs", archs },
+            { "description", ct->description },
+            { "parents", parents }
+        };
+        j["repositories"].push_back(repository);
+        ct = ct->next;
+    }
+    return j;
+}
+
+void DistroqueryAPI::getApiResponse(string path_info) {
+    cout << "Content-Type: application/json;charset=utf-8\n\n" << endl;
+
+    string path, query_string;
+    std::vector<std::string> path_split;
+
+    std::vector<std::string> v = split(path_info, "?");
+
+    if (v.size() > 0) {
+        path = v[0];
+        path_split = split(path, "/");
+    }
+    if (v.size() > 1) query_string = v[1];
+
+    if (path_split.size() > 0 ) {
+        if (path_split[0] == "get_repositories") {
+            // API service: get_repository
+            cout << configToJsonRepositories();
+        } else {
+            cout << setw(4) << json::meta() << endl;
+        }
+    } else {
+        cout << "{\"path_info\":\"" << path << "\",\"query_string\":\"" << query_string << "\"}";
+    }
+
+    exit(0);
+}
diff --git a/src/DistroqueryAPI.hpp b/src/DistroqueryAPI.hpp
new file mode 100644
index 0000000..8c2c738
--- /dev/null
+++ b/src/DistroqueryAPI.hpp
@@ -0,0 +1,45 @@
+/*
+ * distroquery_api - API for querying data generated by distromatic
+ *
+ * Copyright (C) 2024 by Silvan Calarco <silvan.calarco@mambasoft.it>
+ *
+ * This program is free software; you can redistribute it and/or modify it under
+ * the terms of version 2 of the GNU General Public License as published by the
+ * Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY, to the extent permitted by law; without even the implied
+ * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+ * See the GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program; if not, write to the Free Software Foundation, Inc.,
+ * 59 Temple Place, Suite 330, Boston, MA  02111-1307, USA.
+ */
+
+#ifndef __DISTROQUERY_API_H
+#define __DISTROQUERY_API_H
+
+#define API_PREFIX "/api/v1/"
+
+#include <iostream>
+#include <sstream>
+#include <vector>
+#include <nlohmann/json.hpp>
+
+#include "config.h"
+
+using namespace std;
+using json = nlohmann::json;
+
+class DistroqueryAPI {
+    public:
+        DistroqueryAPI(configTag* conf);
+        void getApiResponse(string path_info);
+
+    private:
+        configTag *config;
+        json configToJsonRepositories();
+};
+
+#endif // __DISTROQUERY_API_H
diff --git a/src/distroquery.cpp b/src/distroquery.cpp
index 1371496..b574973 100644
--- a/src/distroquery.cpp
+++ b/src/distroquery.cpp
@@ -1628,8 +1628,8 @@ main(int argc, char *argv[])
    query_string = getenv("QUERY_STRING");
 
    if (strncmp(path_info, "/api/v1/", strlen(API_PREFIX)) == 0) {
-      DistroqueryAPI api;
-      api.getApiResponse(&path_info[strlen(API_PREFIX)]);
+      DistroqueryAPI *api = new DistroqueryAPI(firstconfigtag);
+      api->getApiResponse(&path_info[strlen(API_PREFIX)]);
    } else if (strlen(path_info) > 0) {
       cout << "Content-Type: text/html;charset=utf-8" << endl;
       cout << "Status: 400 Bad request" << endl << endl;