mirror of
https://github.com/retailcrm/mg-transport-core.git
synced 2024-11-22 05:06:04 +03:00
142 lines
4.7 KiB
Markdown
142 lines
4.7 KiB
Markdown
## Message Gateway Transport Library
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[](https://github.com/retailcrm/mg-transport-core/actions?query=workflow%3Aci)
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[](https://codecov.io/gh/retailcrm/mg-transport-core)
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[](https://github.com/retailcrm/mg-transport-core/releases)
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[](https://goreportcard.com/report/github.com/retailcrm/mg-transport-core)
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[](https://golang.org/dl/)
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[](https://pkg.go.dev/github.com/retailcrm/mg-transport-core/core)
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This library provides different functions like error-reporting, logging, localization, etc. in order to make it easier to create transports.
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Usage:
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```go
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package main
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import (
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"os"
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"fmt"
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"html/template"
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"github.com/gin-gonic/gin"
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"github.com/retailcrm/mg-transport-core/core"
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)
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func main() {
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// Create new core.Engine instance
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app := core.New()
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// Load configuration
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app.Config = core.NewConfig("config.yml")
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// Set default error translation key (will be returned if something goes wrong)
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app.DefaultError = "unknown_error"
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// Set translations path
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app.TranslationsPath = "./translations"
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// Preload some translations so they will not be loaded for every request
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app.PreloadLanguages = core.DefaultLanguages
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// Configure gin.Engine inside core.Engine
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app.ConfigureRouter(func(engine *gin.Engine) {
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engine.Static("/static", "./static")
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engine.HTMLRender = app.CreateRenderer(
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] // Insert templates here. Custom functions also can be provided.
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// Default transl function will be injected automatically
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func(renderer *core.Renderer) {
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// Push method will load template from FS or from binary
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r.Push("home", "templates/layout.html", "templates/home.html")
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},
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template.FuncMap{},
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)
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})
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// Start application or fail if something gone wrong (e.g. port is already in use)
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if err := app.Prepare().Run(); err != nil {
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fmt.Printf("Fatal error: %s", err.Error())
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os.Exit(1)
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}
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}
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```
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### Resource embedding
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[embed](https://golang.org/pkg/embed/) can be used to provide resource embedding. Go source files that import "embed" can use the //go:embed directive to initialize a variable of type string, []byte, or FS with the contents of files read from the package directory or subdirectories at compile time.
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Example:
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```go
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package main
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import (
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"os"
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"fmt"
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"html/template"
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"io/fs"
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"net/http"
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"github.com/gin-gonic/gin"
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"github.com/retailcrm/mg-transport-core/core"
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)
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//go:embed static
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var Static fs.FS
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//go:embed translations
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var Translate fs.FS
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//go:embed templates
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var Templates fs.FS
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func main() {
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staticFS, err := fs.Sub(Static, "static")
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if err != nil {
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panic(err)
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}
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translateFS, err := fs.Sub(Translate, "translate")
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if err != nil {
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panic(err)
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}
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templatesFS, err := fs.Sub(Templates, "templates")
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if err != nil {
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panic(err)
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}
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app := core.New()
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app.Config = core.NewConfig("config.yml")
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app.DefaultError = "unknown_error"
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// Now translations will be loaded from embedded files in Go program
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app.TranslationsFS = translateFS
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app.PreloadLanguages = core.DefaultLanguages
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app.ConfigureRouter(func(engine *gin.Engine) {
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// fs.FS should be converted to the http.FileSystem
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// FS implements the io/fs package's FS interface,
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// so it can be used with any package that understands file systems,
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// including net/http, text/template, and html/template.
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engine.StaticFS("/static", http.FS(staticFS))
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engine.HTMLRender = app.CreateRendererFS(
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templatesFS,
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func(renderer *core.Renderer) {
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// Same Push method here, but without relative directory.
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r.Push("home", "layout.html", "home.html")
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},
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template.FuncMap{},
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)
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})
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if err := app.Prepare().Run(); err != nil {
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fmt.Printf("Fatal error: %s", err.Error())
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os.Exit(1)
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}
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}
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```
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### Migration generator
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This library contains helper tool for transports. You can install it via go:
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```sh
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$ go get -u github.com/retailcrm/mg-transport-core/cmd/transport-core-tool
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```
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Currently, it only can generate new migrations for your transport.
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