golang messaging microservice backup

backend/messaging/Dockerfile

@@ -0,0 +1,11 @@
+FROM golang:latest
+
+WORKDIR /usr/src/app
+
+COPY go.mod go.sum ./
+RUN go mod download && go mod verify
+
+COPY . .
+RUN go build -v -o /usr/local/bin/app ./
+
+CMD ["app"]

backend/messaging/README.md

@@ -0,0 +1,129 @@
+# Build Messaging:
+> Requires CHAT_PORT environment variable
+>
+> In backend/messaging directory: 
+> ```
+> go run main.go
+> ```
+
+
+# API Routes:
+
+## GET /message
+> ### Request Example:
+> > No Request Parameters
+> ### Response Example:
+> > ```
+> > Status Code: 200
+> >
+> > [
+> > {   
+> >     "id": 1,
+> >     "sender_id": 1,
+> >     "receiver_id": 2,
+> >     "time_sent": "2022-06-06T00:43:21Z",
+> >     "body": "welp"
+> >  },
+> >  {
+> >    "id": 2,
+> >    "sender_id": 1,
+> >    "receiver_id": 2,
+> >    "time_sent": "2022-06-06T00:43:58Z",
+> >    "body": "welp"
+> >  },
+> >  {
+> >    "id": 3,
+> >    "sender_id": 1,
+> >    "receiver_id": 2,
+> >    "time_sent": "2022-06-06T00:44:59Z",
+> >    "body": "welp"
+> >  }
+> > ]
+> > ```
+
+
+## POST /message
+> ### Request Example:
+> > ```
+> > {   
+> >     "sender_id": 1,
+> >     "receiver_id": 2,
+> >     "time_sent": "2022-06-06T00:43:21Z",
+> >     "body": "welp"
+> > }
+> > ```
+> ### Response Example:
+
+> > ```
+> > Status Code: 200
+> >
+> > ```
+> > {   
+> >     "id": 1
+> >     "sender_id": 1,
+> >     "receiver_id": 2,
+> >     "time_sent": "2022-06-06T00:43:21Z",
+> >     "body": "welp"
+> > }
+> > ```
+
+## GET /message/:id
+> ### Request Example:
+> > id: integer
+> ### Response Example:
+> > ```
+> > Status Code: 200
+> >
+> > ```
+> > {   
+> >     "id": 1
+> >     "sender_id": 1,
+> >     "receiver_id": 2,
+> >     "time_sent": "2022-06-06T00:43:21Z",
+> >     "body": "welp"
+> > }
+> > ```
+
+## DELETE /message/:id
+> ### Request Example:
+> > id: integer
+> ### Response Example:
+> > ```
+> > Status Code: 200
+> >
+> > ```
+> > null
+> > ```
+
+## GET /message/user/:sid/to/:rid
+> ### Request Example:
+> > sid: integer (sender id)
+> > rid: integer (receiver id)
+> ### Response Example:
+> > ```
+> > Status Code: 200
+> >
+> > [
+> > {   
+> >     "id": 1,
+> >     "sender_id": 1,
+> >     "receiver_id": 2,
+> >     "time_sent": "2022-06-06T00:43:21Z",
+> >     "body": "welp"
+> >  },
+> >  {
+> >    "id": 2,
+> >    "sender_id": 1,
+> >    "receiver_id": 2,
+> >    "time_sent": "2022-06-06T00:43:58Z",
+> >    "body": "welp"
+> >  },
+> >  {
+> >    "id": 3,
+> >    "sender_id": 1,
+> >    "receiver_id": 2,
+> >    "time_sent": "2022-06-06T00:44:59Z",
+> >    "body": "welp"
+> >  }
+> > ]
+> > ```

backend/messaging/db/db.go

@@ -0,0 +1,57 @@
+package db
+
+import (
+	"database/sql"
+	"fmt"
+	"io/ioutil"
+	"os"
+
+	_ "github.com/lib/pq"
+)
+
+type DbStruct[T interface{}] interface {
+	QueryAs(T, string)
+}
+
+type Database struct {
+	Client *sql.DB
+}
+
+func New(db_name string, username string, password string) Database {
+	conn_str := fmt.Sprintf("postgres://%s:%s@%s?sslmode=disable", username, password, db_name)
+	db, err := sql.Open("postgres", conn_str)
+	if err != nil {
+		panic(err)
+	}
+	return Database{
+		Client: db,
+	}
+}
+
+func NewFromEnv() Database {
+	db_name := os.Getenv("POSTGRES_DB")
+	user := os.Getenv("POSTGRES_USER")
+	pw := os.Getenv("POSTGRES_PASSWORD")
+	return New(db_name, user, pw)
+}
+
+func (db Database) QueryFromFile(file string) bool {
+	q, err := ioutil.ReadFile(file)
+	if err != nil {
+		return false
+	}
+	return db.Query(string(q))
+}
+
+func (db Database) Query(query string) bool {
+	_, err := db.Client.Exec(query)
+	return err == nil
+}
+
+func (db Database) QueryRows(query string) *sql.Rows {
+	rows, err := db.Client.Query(query)
+	if err != nil {
+		return nil
+	}
+	return rows
+}

backend/messaging/db/queries/create_tables.sql

@@ -0,0 +1,7 @@
+CREATE TABLE IF NOT EXISTS messages (
+    id SERIAL PRIMARY KEY NOT NULL,
+    sender_id INT NOT NULL,
+    receiver_id INT NOT NULL,
+    time_sent TIMESTAMPTZ,
+    body TEXT
+);

backend/messaging/go.mod

@@ -0,0 +1,27 @@
+module messaging
+
+go 1.18
+
+require github.com/gin-gonic/gin v1.8.0
+
+require (
+	github.com/gin-contrib/sse v0.1.0 // indirect
+	github.com/go-playground/locales v0.14.0 // indirect
+	github.com/go-playground/universal-translator v0.18.0 // indirect
+	github.com/go-playground/validator/v10 v10.10.0 // indirect
+	github.com/goccy/go-json v0.9.7 // indirect
+	github.com/json-iterator/go v1.1.12 // indirect
+	github.com/leodido/go-urn v1.2.1 // indirect
+	github.com/lib/pq v1.10.6 // indirect
+	github.com/mattn/go-isatty v0.0.14 // indirect
+	github.com/modern-go/concurrent v0.0.0-20180228061459-e0a39a4cb421 // indirect
+	github.com/modern-go/reflect2 v1.0.2 // indirect
+	github.com/pelletier/go-toml/v2 v2.0.1 // indirect
+	github.com/ugorji/go/codec v1.2.7 // indirect
+	golang.org/x/crypto v0.0.0-20210711020723-a769d52b0f97 // indirect
+	golang.org/x/net v0.0.0-20210226172049-e18ecbb05110 // indirect
+	golang.org/x/sys v0.0.0-20210806184541-e5e7981a1069 // indirect
+	golang.org/x/text v0.3.6 // indirect
+	google.golang.org/protobuf v1.28.0 // indirect
+	gopkg.in/yaml.v2 v2.4.0 // indirect
+)

backend/messaging/go.sum

@@ -0,0 +1,89 @@
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