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route.go
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route.go
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package tonic
import (
"fmt"
"reflect"
"regexp"
"slices"
"strings"
)
const (
Get = "GET"
Post = "POST"
Put = "PUT"
Delete = "DELETE"
Patch = "PATCH"
Options = "OPTIONS"
Head = "HEAD"
)
const (
pathParam = "path"
queryParam = "query"
)
type Route struct {
Method string
Url string
Tags []string
Schema *RouteSchema
HandlerRegister func(path string)
}
type RouteSchema struct {
Summary string
Description string
Querystring any
Params any
Body any
Response map[int]any
}
var apiSpec map[string]any
func CreateRoutes(basePath string, routes []Route) {
if !isInit {
panic("Tonic must be initialized first!")
}
apiSpecPaths, _ := apiSpec["paths"].(map[string]any)
for routeIdx := range routes {
route := &routes[routeIdx]
route.Url = normalizePath(route.Url)
// Register the route handler
route.HandlerRegister(route.Url)
apiPath := toSwaggerAPIPath(fmt.Sprintf("%s%s", basePath, route.Url))
pathSpec, apiPathExisted := apiSpecPaths[apiPath]
if !apiPathExisted {
pathSpec = make(map[string]any)
apiSpecPaths[apiPath] = pathSpec
}
pathSpec.(map[string]any)[strings.ToLower(route.Method)] = buildHandlerSpec(route)
}
}
func buildHandlerSpec(route *Route) map[string]any {
handlerSpec := make(map[string]any)
if route.Schema == nil {
return handlerSpec
}
if route.Schema.Summary != "" {
handlerSpec["summary"] = route.Schema.Summary
}
if route.Schema.Description != "" {
handlerSpec["description"] = route.Schema.Description
}
if route.Tags != nil {
handlerSpec["tags"] = route.Tags
}
var paramsSpec []map[string]any
if route.Schema.Params != nil {
paramsSpec = buildParamSpecs(pathParam, &route.Schema.Params)
}
if route.Schema.Querystring != nil {
paramsSpec = append(paramsSpec, buildParamSpecs(queryParam, &route.Schema.Querystring)...)
}
if len(paramsSpec) > 0 {
handlerSpec["parameters"] = paramsSpec
}
if route.Schema.Body != nil {
handlerSpec["requestBody"] = map[string]any{
"content": map[string]any{
"application/json": map[string]any{
"schema": ToSwaggerSchema(reflect.TypeOf(route.Schema.Body)),
},
},
"required": true,
}
}
if route.Schema.Response != nil {
handlerSpec["responses"] = map[int]any{}
for status, response := range route.Schema.Response {
respType := reflect.TypeOf(response)
handlerSpec["responses"].(map[int]any)[status] = map[string]any{
"content": map[string]any{
"application/json": map[string]any{
"schema": ToSwaggerSchema(respType),
},
},
"description": "Default description",
}
}
}
return handlerSpec
}
func buildParamSpecs(paramType string, params *any) []map[string]any {
paramSpecs := []map[string]any{}
t := reflect.TypeOf(*params)
paramObjSchema := ToSwaggerSchema(t)
for propName, propSchema := range paramObjSchema["properties"].(map[string]any) {
paramSchema := map[string]any{
"in": paramType,
"name": propName,
"required": slices.Contains(paramObjSchema["required"].([]string), propName),
"schema": propSchema,
}
paramSpecs = append(paramSpecs, paramSchema)
}
return paramSpecs
}
func toSwaggerAPIPath(path string) string {
modifiedPath := regexp.MustCompile(`/:(\w+)`).ReplaceAllStringFunc(path, func(match string) string {
return fmt.Sprintf("/{%s}", match[2:])
})
return modifiedPath
}
func normalizePath(path string) string {
if path == "/" {
return ""
} else if len(path) > 0 && path[0] != '/' {
return fmt.Sprintf("/%s", path)
}
return path
}