started working on database design

go.mod

@@ -4,4 +4,17 @@ go 1.25.0
 
 require github.com/joho/godotenv v1.5.1
 
-require github.com/mattn/go-sqlite3 v1.14.34 // indirect
+require (
+	github.com/dustin/go-humanize v1.0.1 // indirect
+	github.com/google/uuid v1.6.0 // indirect
+	github.com/mattn/go-isatty v0.0.20 // indirect
+	github.com/mattn/go-sqlite3 v1.14.34 // indirect
+	github.com/ncruces/go-strftime v1.0.0 // indirect
+	github.com/remyoudompheng/bigfft v0.0.0-20230129092748-24d4a6f8daec // indirect
+	golang.org/x/exp v0.0.0-20251023183803-a4bb9ffd2546 // indirect
+	golang.org/x/sys v0.37.0 // indirect
+	modernc.org/libc v1.67.6 // indirect
+	modernc.org/mathutil v1.7.1 // indirect
+	modernc.org/memory v1.11.0 // indirect
+	modernc.org/sqlite v1.46.1 // indirect
+)

go.sum

@@ -1,4 +1,27 @@
+github.com/dustin/go-humanize v1.0.1 h1:GzkhY7T5VNhEkwH0PVJgjz+fX1rhBrR7pRT3mDkpeCY=
+github.com/dustin/go-humanize v1.0.1/go.mod h1:Mu1zIs6XwVuF/gI1OepvI0qD18qycQx+mFykh5fBlto=
+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/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/mattn/go-sqlite3 v1.14.34 h1:3NtcvcUnFBPsuRcno8pUtupspG/GM+9nZ88zgJcp6Zk=
 github.com/mattn/go-sqlite3 v1.14.34/go.mod h1:Uh1q+B4BYcTPb+yiD3kU8Ct7aC0hY9fxUwlHK0RXw+Y=
+github.com/ncruces/go-strftime v1.0.0 h1:HMFp8mLCTPp341M/ZnA4qaf7ZlsbTc+miZjCLOFAw7w=
+github.com/ncruces/go-strftime v1.0.0/go.mod h1:Fwc5htZGVVkseilnfgOVb9mKy6w1naJmn9CehxcKcls=
+github.com/remyoudompheng/bigfft v0.0.0-20230129092748-24d4a6f8daec h1:W09IVJc94icq4NjY3clb7Lk8O1qJ8BdBEF8z0ibU0rE=
+github.com/remyoudompheng/bigfft v0.0.0-20230129092748-24d4a6f8daec/go.mod h1:qqbHyh8v60DhA7CoWK5oRCqLrMHRGoxYCSS9EjAz6Eo=
+golang.org/x/exp v0.0.0-20251023183803-a4bb9ffd2546 h1:mgKeJMpvi0yx/sU5GsxQ7p6s2wtOnGAHZWCHUM4KGzY=
+golang.org/x/exp v0.0.0-20251023183803-a4bb9ffd2546/go.mod h1:j/pmGrbnkbPtQfxEe5D0VQhZC6qKbfKifgD0oM7sR70=
+golang.org/x/sys v0.6.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
+golang.org/x/sys v0.37.0 h1:fdNQudmxPjkdUTPnLn5mdQv7Zwvbvpaxqs831goi9kQ=
+golang.org/x/sys v0.37.0/go.mod h1:OgkHotnGiDImocRcuBABYBEXf8A9a87e/uXjp9XT3ks=
+modernc.org/libc v1.67.6 h1:eVOQvpModVLKOdT+LvBPjdQqfrZq+pC39BygcT+E7OI=
+modernc.org/libc v1.67.6/go.mod h1:JAhxUVlolfYDErnwiqaLvUqc8nfb2r6S6slAgZOnaiE=
+modernc.org/mathutil v1.7.1 h1:GCZVGXdaN8gTqB1Mf/usp1Y/hSqgI2vAGGP4jZMCxOU=
+modernc.org/mathutil v1.7.1/go.mod h1:4p5IwJITfppl0G4sUEDtCr4DthTaT47/N3aT6MhfgJg=
+modernc.org/memory v1.11.0 h1:o4QC8aMQzmcwCK3t3Ux/ZHmwFPzE6hf2Y5LbkRs+hbI=
+modernc.org/memory v1.11.0/go.mod h1:/JP4VbVC+K5sU2wZi9bHoq2MAkCnrt2r98UGeSK7Mjw=
+modernc.org/sqlite v1.46.1 h1:eFJ2ShBLIEnUWlLy12raN0Z1plqmFX9Qe3rjQTKt6sU=
+modernc.org/sqlite v1.46.1/go.mod h1:CzbrU2lSB1DKUusvwGz7rqEKIq+NUd8GWuBBZDs9/nA=

main.go

@@ -1,24 +1,110 @@
 package main
 
-// https://stackoverflow.com/questions/61080317/go-lang-very-simple-http-post-requests-and-response-endpoint (simple post endpoint)
+/*
-// https://stackoverflow.com/questions/16466320/is-there-a-way-to-do-repetitive-tasks-at-intervals
+Author: Valentijn van der Jagt
-import (
-	"log"
-	"net/http"
 
-	_ "github.com/mattn/go-sqlite3"
+In this project i play around with go. This is my first time writing go, and im using a lot of help from sources. all useful sources are listed in the comments below.
+
+*/
+
+// https://stackoverflow.com/questions/61080317/go-lang-very-simple-http-post-requests-and-response-endpoint, HTTP Server example
+// 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.
+import (
+	"database/sql"
+	"log"
+
+	_ "modernc.org/sqlite"
 )
 
-func checkRequestHeader(req *http.Request, res http.ResponseWriter, method string) bool {
+func executeQuery(db *sql.DB, query string) {
-	if req.Method == method {
+	_, err := db.Exec(query)
-		return true
+	if err != nil {
+		log.Printf("%q: %s\n", err, query)
+		return
 	}
-	res.WriteHeader(http.StatusMethodNotAllowed)
+}
-	return false
+
+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() {
+	db, err := sql.Open("sqlite", "./dhl.db")
+	if err != nil {
+		log.Fatal(err)
+	}
+	defer db.Close()
 
-	log.Println("[Main] now serving 0.0.0.0:8090")
+	dropTables(db) // temporarely for debugging
-	http.ListenAndServe(":8090", nil)
+	createTables(db)
 }