http testing & dotenv experimentation

.env.example

@@ -0,0 +1,2 @@
+DHL_API_KEY = "...."
+DHL_API_SECRET = "...."

go.mod

@@ -7,6 +7,7 @@ require modernc.org/sqlite v1.46.1
 require (
 	github.com/dustin/go-humanize v1.0.1 // indirect
 	github.com/google/uuid v1.6.0 // indirect
+	github.com/joho/godotenv v1.5.1 // indirect
 	github.com/mattn/go-isatty v0.0.20 // indirect
 	github.com/ncruces/go-strftime v1.0.0 // indirect
 	github.com/remyoudompheng/bigfft v0.0.0-20230129092748-24d4a6f8daec // indirect

go.sum

@@ -6,6 +6,8 @@ github.com/google/uuid v1.6.0 h1:NIvaJDMOsjHA8n1jAhLSgzrAzy1Hgr+hNrb57e+94F0=
 github.com/google/uuid v1.6.0/go.mod h1:TIyPZe4MgqvfeYDBFedMoGGpEw/LqOeaOT+nhxU+yHo=
 github.com/hashicorp/golang-lru/v2 v2.0.7 h1:a+bsQ5rvGLjzHuww6tVxozPZFVghXaHOwFs4luLUK2k=
 github.com/hashicorp/golang-lru/v2 v2.0.7/go.mod h1:QeFd9opnmA6QUJc5vARoKUSoFhyfM2/ZepoAG6RGpeM=
+github.com/joho/godotenv v1.5.1 h1:7eLL/+HRGLY0ldzfGMeQkb7vMd0as4CfYvUVzLqw0N0=
+github.com/joho/godotenv v1.5.1/go.mod h1:f4LDr5Voq0i2e/R5DDNOoa2zzDfwtkZa6DnEwAbqwq4=
 github.com/mattn/go-isatty v0.0.20 h1:xfD0iDuEKnDkl03q4limB+vH+GxLEtL/jb4xVJSWWEY=
 github.com/mattn/go-isatty v0.0.20/go.mod h1:W+V8PltTTMOvKvAeJH7IuucS94S2C6jfK/D7dTCTo3Y=
 github.com/ncruces/go-strftime v1.0.0 h1:HMFp8mLCTPp341M/ZnA4qaf7ZlsbTc+miZjCLOFAw7w=

main.go

@@ -11,100 +11,107 @@ In this project i play around with go. This is my first time writing go, and im
 // https://stackoverflow.com/questions/16466320/is-there-a-way-to-do-repetitive-tasks-at-intervals, How timer intervals work in GoLang
 // https://pkg.go.dev/modernc.org/sqlite#section-documentation, how to interface with specifically sqlite in GoLang
 // https://github.com/mattn/go-sqlite3/blob/v1.14.34/_example/simple/simple.go,  How to inferface with a database in GoLang.
+// https://go.dev/tour/moretypes/6, arrays....
+// https://go.dev/doc/tutorial/handle-errors, deal with returning errors
+
 import (
 	"database/sql"
 	"log"
+	"errors"
+	"net/http"
+	"io"
+	"os"
 
+	"github.com/joho/godotenv"
 	_ "modernc.org/sqlite"
 )
 
-func executeQuery(db *sql.DB, query string) {
-	_, err := db.Exec(query)
+const API_URL string =  "http://www.google.com/robots.txt"
+
+var dhl_api_key string
+
+func findParcelProvider(code string, postal_code string)(string, error){
+	providers := [4]string{"express", "parcel-nl", "ecommerce", "ecommerce-europe"}
+	for _, v := range providers {
+		// do http api reqiest
+		success := true
+
+		if (success){
+			return v, nil
+		}
+	}
+	return "", errors.New("Parcel not found in the common providers!")
+}
+
+func markPackageSubscription(code string, postal_code string, service string){
+	/*
+
+{
+	"type": "Shipment",
+	"format": "Default",
+	"service": "parcel-nl",
+	"hook": {
+		"uri": "https://your-server.example.com/dhl-webhook"
+	},
+	"events": [
+		"pre-transit",
+		"transit",
+		"delivered",
+		"failure",
+		"unknown"
+	],
+	"shipmentIDsWithChallengeDetails": [
+		{
+		"shipmentID": "3SABCDEF123456",
+		"postalCode": "1012AB"
+		}
+	]
+}
+
+	*/
+	res, err := http.Get(API_URL)
 	if err != nil {
-		log.Printf("%q: %s\n", err, query)
-		return
+		log.Fatal(err)
 	}
+	body, err := io.ReadAll(res.Body)
+	res.Body.Close()
+	if res.StatusCode > 299 {
+		log.Fatalf("Response failed with status code: %d and\nbody: %s\n", res.StatusCode, body)
 	}
+	if err != nil {
+		log.Fatal(err)
+	}
+	log.Printf("%s, %s\n", body, dhl_api_key)
 
-func createTables(db *sql.DB) {
-	executeQuery(db, `
-		CREATE TABLE shipments (
-			id            INTEGER PRIMARY KEY AUTOINCREMENT,
-			tracking_number TEXT NOT NULL UNIQUE,
-			service       TEXT NOT NULL,
-			sender_name   TEXT,
-			receiver_name TEXT,
-			origin_country  TEXT,
-			origin_city     TEXT,
-			origin_postal   TEXT,
-			origin_address  TEXT,
-			destination_country TEXT,
-			destination_city    TEXT,
-			destination_postal  TEXT,
-			destination_address TEXT,
-			pickup_date   TEXT,
-			estimated_delivery_from TEXT,
-			estimated_delivery_to   TEXT,
-			current_status TEXT,
-			last_update   TEXT DEFAULT (datetime('now')),
-			created_at    TEXT DEFAULT (datetime('now'))
-		);
-
-		-- Status Events: history of status updates
-		CREATE TABLE shipment_events (
-			id            INTEGER PRIMARY KEY,
-			shipment_id   INTEGER NOT NULL,
-			event_time    TEXT NOT NULL,
-			status_code   TEXT NOT NULL,
-			status_desc   TEXT,
-			description   TEXT,
-			remark        TEXT,
-			next_steps    TEXT,
-			location_country TEXT,
-			location_city    TEXT,
-			location_postal  TEXT,
-			FOREIGN KEY (shipment_id) REFERENCES shipments(id)
-		);
-		CREATE INDEX idx_events_shipment_time ON shipment_events(shipment_id, event_time);
-
-		CREATE TABLE shipment_updates (
-			id            INTEGER PRIMARY KEY,
-			shipment_id   INTEGER NOT NULL,
-			update_time   TEXT DEFAULT (datetime('now')),
-			service       TEXT,
-			location_country TEXT,
-			location_city    TEXT,
-			status_code   TEXT,
-			status_desc   TEXT,
-			estimated_from TEXT,
-			estimated_to   TEXT,
-			FOREIGN KEY (shipment_id) REFERENCES shipments(id)
-		);
-		CREATE INDEX idx_updates_shipment_time ON shipment_updates(shipment_id, update_time);
-	`)
-
-	log.Printf("[Database] tables created")
 
 }
 
-func dropTables(db *sql.DB) {
-	executeQuery(db, `
-		DROP TABLE IF EXISTS shipments;
-		DROP TABLE IF EXISTS shipment_events;
-		DROP TABLE IF EXISTS shipment_updates;
-	`)
-
-	log.Printf("[Database] tables dropped")
-
-}
 
 func main() {
+	err := godotenv.Load()
+	if err != nil {
+		log.Fatal("Error loading .env file")
+	}
+
+	dhl_api_key = os.Getenv("DHL_API_KEY")
+
 	db, err := sql.Open("sqlite", "./dhl.db")
 	if err != nil {
 		log.Fatal(err)
 	}
 	defer db.Close()
 
-	dropTables(db) // temporarely for debugging
-	createTables(db)
+	code := "blablbla"
+	postal := "1234ab"
+
+	
+	provider, err := findParcelProvider(code, postal)
+	if (err != nil){
+		log.Fatal(err)
+	}
+
+	// if theres a result, print it.
+	log.Printf("Code: %s, Postal Code: %s, Tracking Service: %s", code, postal, provider)
+	
+	markPackageSubscription(code, postal, provider)
 }