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http_context.go
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http_context.go
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package core
import (
"bytes"
"encoding/json"
"fmt"
"github.com/labstack/echo/v4"
"github.com/mssola/user_agent"
"github.com/pskclub/mine-core/consts"
"io/ioutil"
"net/http"
"strconv"
"strings"
"time"
)
type IHTTPContext interface {
IContext
echo.Context
BindWithValidate(ctx IValidateContext) IError
BindOnly(i interface{}) IError
GetPageOptions() *PageOptions
GetPageOptionsWithOptions(options *PageOptionsOptions) *PageOptions
GetUserAgent() *user_agent.UserAgent
WithSaveCache(data interface{}, key string, duration time.Duration) interface{}
}
type HTTPContext struct {
echo.Context
IContext
logger ILogger
}
type PageOptionsOptions struct {
OrderByAllowed []string
}
func (c *HTTPContext) WithSaveCache(data interface{}, key string, duration time.Duration) interface{} {
err := c.Cache().SetJSON(key, data, duration)
if err != nil {
c.NewError(err, Error{
Status: http.StatusInternalServerError,
Code: "CACHE_ERROR",
Message: "cache internal error"})
}
return data
}
func (c *HTTPContext) genOrderBy(s string) []string {
orderBy := make([]string, 0)
fields := strings.Split(s, ",")
for _, field := range fields {
spaceParameters := strings.Split(field, " ")
bracketParameters := strings.Split(field, "(")
if len(spaceParameters) == 1 && len(bracketParameters) == 1 && spaceParameters[0] != "" {
orderBy = append(orderBy, fmt.Sprintf("%s desc", spaceParameters[0]))
} else if len(spaceParameters) == 2 {
name := spaceParameters[0]
if name != "" {
shortingParameter := spaceParameters[1]
if shortingParameter == "asc" {
orderBy = append(orderBy, fmt.Sprintf("%s %s", name, shortingParameter))
} else {
orderBy = append(orderBy, fmt.Sprintf("%s desc", name))
}
}
} else if len(bracketParameters) == 2 {
name := strings.TrimSuffix(bracketParameters[1], ")")
if name != "" {
shortingParameter := bracketParameters[0]
if shortingParameter == "asc" {
orderBy = append(orderBy, fmt.Sprintf("%s %s", name, shortingParameter))
} else {
orderBy = append(orderBy, fmt.Sprintf("%s desc", name))
}
}
}
}
return orderBy
}
func (c *HTTPContext) GetPageOptionsWithOptions(options *PageOptionsOptions) *PageOptions {
pageOptions := c.GetPageOptions()
if options != nil {
newOrderBy := make([]string, 0)
for _, field := range pageOptions.OrderBy {
parameters := strings.Split(field, " ")
sortBy := parameters[0]
for _, name := range options.OrderByAllowed {
if sortBy == name {
newOrderBy = append(newOrderBy, field)
}
}
}
pageOptions.OrderBy = newOrderBy
}
return pageOptions
}
func (c *HTTPContext) GetPageOptions() *PageOptions {
limit, _ := strconv.ParseInt(c.QueryParam("limit"), 10, 64)
page, _ := strconv.ParseInt(c.QueryParam("page"), 10, 64)
if limit <= 0 {
limit = consts.PageLimitDefault
}
if limit > consts.PageLimitMax {
limit = consts.PageLimitMax
}
if page < 1 {
page = 1
}
return &PageOptions{
Q: c.QueryParam("q"),
Limit: limit,
Page: page,
OrderBy: c.genOrderBy(c.QueryParam("order_by")),
}
}
type HandlerFunc func(IHTTPContext) error
type HTTPContextOptions struct {
ContextOptions *ContextOptions
}
func NewHTTPContext(ctx echo.Context, options *HTTPContextOptions) IHTTPContext {
ctxOptions := options.ContextOptions
ctxOptions.contextType = consts.HTTP
return &HTTPContext{Context: ctx, logger: nil, IContext: NewContext(ctxOptions)}
}
func WithHTTPContext(h HandlerFunc) echo.HandlerFunc {
return func(c echo.Context) error {
return h(c.(*HTTPContext))
}
}
func (c *HTTPContext) validateJSON(i interface{}) IError {
var body []byte
if c.Request().Body != nil {
body, _ = ioutil.ReadAll(c.Request().Body)
}
// Restore the io.ReadCloser to its original state
c.Request().Body = ioutil.NopCloser(bytes.NewBuffer(body))
err := json.Unmarshal(body, &i)
if err != nil {
switch err := err.(type) {
case *json.UnmarshalTypeError:
return NewValidatorFields(map[string]jsonErr{
err.Field: {
Code: "INVALID_TYPE",
Message: fmt.Sprintf("This %s field must be %s type",
err.Field, err.Type),
},
})
default:
return Error{
Status: http.StatusBadRequest,
Code: "INVALID_JSON",
Message: "Must be json format"}
}
}
return nil
}
func (c *HTTPContext) BindWithValidate(ctx IValidateContext) IError {
if err := c.validateJSON(ctx); err != nil {
newError := err.(IError)
return newError
}
return ctx.Valid(c)
}
func (c *HTTPContext) BindOnly(i interface{}) IError {
if err := c.validateJSON(i); err != nil {
return err
}
c.Bind(i)
return nil
}
func (c *HTTPContext) Log() ILogger {
if c.logger == nil {
c.logger = NewLogger(c)
}
return c.logger.(ILogger)
}
func (c HTTPContext) GetUserAgent() *user_agent.UserAgent {
return user_agent.New(c.Request().UserAgent())
}
func (c *HTTPContext) NewError(err error, errorType IError, args ...interface{}) IError {
return newError(c, err, errorType, args...)
}