(Feat): Initial Commit

internal/config/db_config.go

@@ -0,0 +1,57 @@
+package config
+
+import (
+	"fmt"
+	"path/filepath"
+	"sort"
+	"strings"
+	"time"
+
+	"allaboutapps.dev/aw/go-starter/internal/util"
+)
+
+// The DatabaseMigrationTable name is baked into the binary
+// This setting should always be in sync with dbconfig.yml, sqlboiler.toml and the live database (e.g. to be able to test producation dumps locally)
+const DatabaseMigrationTable = "migrations"
+
+// The DatabaseMigrationFolder (folder with all *.sql migrations).
+// This settings should always be in sync with dbconfig.yaml and Dockerfile (the final app stage).
+// It's expected that the migrations folder lives at the root of this project or right next to the app binary.
+var DatabaseMigrationFolder = filepath.Join(util.GetProjectRootDir(), "/migrations")
+
+type Database struct {
+	Host             string
+	Port             int
+	Username         string
+	Password         string `json:"-"` // sensitive
+	Database         string
+	AdditionalParams map[string]string `json:"additionalParams,omitempty"` // Optional additional connection parameters mapped into the connection string
+	MaxOpenConns     int
+	MaxIdleConns     int
+	ConnMaxLifetime  time.Duration
+}
+
+// ConnectionString generates a connection string to be passed to sql.Open or equivalents, assuming Postgres syntax
+func (c Database) ConnectionString() string {
+	var builder strings.Builder
+	builder.WriteString(fmt.Sprintf("host=%s port=%d user=%s password=%s dbname=%s", c.Host, c.Port, c.Username, c.Password, c.Database))
+
+	if _, ok := c.AdditionalParams["sslmode"]; !ok {
+		builder.WriteString(" sslmode=disable")
+	}
+
+	if len(c.AdditionalParams) > 0 {
+		params := make([]string, 0, len(c.AdditionalParams))
+		for param := range c.AdditionalParams {
+			params = append(params, param)
+		}
+
+		sort.Strings(params)
+
+		for _, param := range params {
+			fmt.Fprintf(&builder, " %s=%s", param, c.AdditionalParams[param])
+		}
+	}
+
+	return builder.String()
+}