Initial support for SQL database

.gitignore

@@ -0,0 +1 @@
+jilo-server

README.md

@@ -12,16 +12,22 @@ This project is licensed under the GNU General Public License version 2 (GPL-2.0
 
 Clone the git repo. Either run the server with Go or build it and run the executable.
 
+Dependencies:
+
+```bash
+apt install gcc sqlite3 libsqlite3-dev
+```
+
 Run it (mainly used for tests):
 
 ```bash
-go run main.go
+CGO_ENABLED=1 go run main.go
 ```
 
 Build the agent:
 
 ```bash
-go build -o jilo-server main.go
+CGO_ENABLED=1 go build -o jilo-server main.go
 ```
 
 ## configuration

main.go

@@ -1,12 +1,10 @@
 package main
 
 import (
-//    "database/sql"
+    "database/sql"
-//    "fmt"
     "io/ioutil"
     "log"
     "net/http"
-//    "os"
     "time"
 
     _ "github.com/mattn/go-sqlite3"
@@ -43,11 +41,35 @@ func readConfig(filePath string) Config {
     return config
 }
 
+func setupDatabase(dbPath string) (*sql.DB, error) {
+
+    // Open the database
+    db, err := sql.Open("sqlite3", dbPath)
+    if err != nil {
+        return nil, err
+    }
+
+    // If the table is not there, initialize it
+    createTable := `
+    CREATE TABLE IF NOT EXISTS endpoint_data (
+        id INTEGER PRIMARY KEY AUTOINCREMENT,
+        timestamp DATETIME DEFAULT CURRENT_TIMESTAMP,
+        status_code INTEGER,
+        response_time_ms INTEGER
+    );`
+    _, err = db.Exec(createTable)
+    if err != nil {
+        return nil, err
+    }
+
+    return db, nil
+}
+
 func checkEndpoint(endpoint string) (int, int64) {
     start := time.Now()
     resp, err := http.Get(endpoint)
     if err != nil {
-        log.Println("Failed to check the endpoint: ", err)
+        log.Println("Failed to check the endpoint:", err)
         return 0, 0
     }
     defer resp.Body.Close()
@@ -56,9 +78,24 @@ func checkEndpoint(endpoint string) (int, int64) {
     return resp.StatusCode, elapsed
 }
 
+func saveData(db *sql.DB, statusCode int, responseTime int64) {
+    _, err := db.Exec("INSERT INTO endpoint_data (status_code, response_time_ms) VALUES (?, ?)", statusCode, responseTime)
+    if err != nil {
+        log.Println("Failed to insert data into the database:", err)
+    }
+}
+
 func main() {
+    // config file
     config := readConfig("jilo-server.conf")
 
+    // Connect to or setup the database
+    db, err := setupDatabase(config.DatabasePath)
+    if err != nil {
+        log.Fatal("Failed to initialize the database:", err)
+    }
+    defer db.Close()
+
     ticker := time.NewTicker(time.Duration(config.CheckPeriod) * time.Minute)
     defer ticker.Stop()