1 files changed, 340 insertions, 0 deletions
diff --git a/teleirc/matterbridge/vendor/github.com/labstack/echo/v4/bind.go b/teleirc/matterbridge/vendor/github.com/labstack/echo/v4/bind.go
new file mode 100644
index 0000000..c841ca0
--- /dev/null
+++ b/teleirc/matterbridge/vendor/github.com/labstack/echo/v4/bind.go
@@ -0,0 +1,340 @@
+package echo
+
+import (
+	"encoding"
+	"encoding/xml"
+	"errors"
+	"fmt"
+	"net/http"
+	"reflect"
+	"strconv"
+	"strings"
+)
+
+type (
+	// Binder is the interface that wraps the Bind method.
+	Binder interface {
+		Bind(i interface{}, c Context) error
+	}
+
+	// DefaultBinder is the default implementation of the Binder interface.
+	DefaultBinder struct{}
+
+	// BindUnmarshaler is the interface used to wrap the UnmarshalParam method.
+	// Types that don't implement this, but do implement encoding.TextUnmarshaler
+	// will use that interface instead.
+	BindUnmarshaler interface {
+		// UnmarshalParam decodes and assigns a value from an form or query param.
+		UnmarshalParam(param string) error
+	}
+)
+
+// BindPathParams binds path params to bindable object
+func (b *DefaultBinder) BindPathParams(c Context, i interface{}) error {
+	names := c.ParamNames()
+	values := c.ParamValues()
+	params := map[string][]string{}
+	for i, name := range names {
+		params[name] = []string{values[i]}
+	}
+	if err := b.bindData(i, params, "param"); err != nil {
+		return NewHTTPError(http.StatusBadRequest, err.Error()).SetInternal(err)
+	}
+	return nil
+}
+
+// BindQueryParams binds query params to bindable object
+func (b *DefaultBinder) BindQueryParams(c Context, i interface{}) error {
+	if err := b.bindData(i, c.QueryParams(), "query"); err != nil {
+		return NewHTTPError(http.StatusBadRequest, err.Error()).SetInternal(err)
+	}
+	return nil
+}
+
+// BindBody binds request body contents to bindable object
+// NB: then binding forms take note that this implementation uses standard library form parsing
+// which parses form data from BOTH URL and BODY if content type is not MIMEMultipartForm
+// See non-MIMEMultipartForm: https://golang.org/pkg/net/http/#Request.ParseForm
+// See MIMEMultipartForm: https://golang.org/pkg/net/http/#Request.ParseMultipartForm
+func (b *DefaultBinder) BindBody(c Context, i interface{}) (err error) {
+	req := c.Request()
+	if req.ContentLength == 0 {
+		return
+	}
+
+	ctype := req.Header.Get(HeaderContentType)
+	switch {
+	case strings.HasPrefix(ctype, MIMEApplicationJSON):
+		if err = c.Echo().JSONSerializer.Deserialize(c, i); err != nil {
+			switch err.(type) {
+			case *HTTPError:
+				return err
+			default:
+				return NewHTTPError(http.StatusBadRequest, err.Error()).SetInternal(err)
+			}
+		}
+	case strings.HasPrefix(ctype, MIMEApplicationXML), strings.HasPrefix(ctype, MIMETextXML):
+		if err = xml.NewDecoder(req.Body).Decode(i); err != nil {
+			if ute, ok := err.(*xml.UnsupportedTypeError); ok {
+				return NewHTTPError(http.StatusBadRequest, fmt.Sprintf("Unsupported type error: type=%v, error=%v", ute.Type, ute.Error())).SetInternal(err)
+			} else if se, ok := err.(*xml.SyntaxError); ok {
+				return NewHTTPError(http.StatusBadRequest, fmt.Sprintf("Syntax error: line=%v, error=%v", se.Line, se.Error())).SetInternal(err)
+			}
+			return NewHTTPError(http.StatusBadRequest, err.Error()).SetInternal(err)
+		}
+	case strings.HasPrefix(ctype, MIMEApplicationForm), strings.HasPrefix(ctype, MIMEMultipartForm):
+		params, err := c.FormParams()
+		if err != nil {
+			return NewHTTPError(http.StatusBadRequest, err.Error()).SetInternal(err)
+		}
+		if err = b.bindData(i, params, "form"); err != nil {
+			return NewHTTPError(http.StatusBadRequest, err.Error()).SetInternal(err)
+		}
+	default:
+		return ErrUnsupportedMediaType
+	}
+	return nil
+}
+
+// BindHeaders binds HTTP headers to a bindable object
+func (b *DefaultBinder) BindHeaders(c Context, i interface{}) error {
+	if err := b.bindData(i, c.Request().Header, "header"); err != nil {
+		return NewHTTPError(http.StatusBadRequest, err.Error()).SetInternal(err)
+	}
+	return nil
+}
+
+// Bind implements the `Binder#Bind` function.
+// Binding is done in following order: 1) path params; 2) query params; 3) request body. Each step COULD override previous
+// step binded values. For single source binding use their own methods BindBody, BindQueryParams, BindPathParams.
+func (b *DefaultBinder) Bind(i interface{}, c Context) (err error) {
+	if err := b.BindPathParams(c, i); err != nil {
+		return err
+	}
+	// Only bind query parameters for GET/DELETE/HEAD to avoid unexpected behavior with destination struct binding from body.
+	// For example a request URL `&id=1&lang=en` with body `{"id":100,"lang":"de"}` would lead to precedence issues.
+	// The HTTP method check restores pre-v4.1.11 behavior to avoid these problems (see issue #1670)
+  method := c.Request().Method
+	if method == http.MethodGet || method == http.MethodDelete || method == http.MethodHead {
+		if err = b.BindQueryParams(c, i); err != nil {
+			return err
+		}
+	}
+	return b.BindBody(c, i)
+}
+
+// bindData will bind data ONLY fields in destination struct that have EXPLICIT tag
+func (b *DefaultBinder) bindData(destination interface{}, data map[string][]string, tag string) error {
+	if destination == nil || len(data) == 0 {
+		return nil
+	}
+	typ := reflect.TypeOf(destination).Elem()
+	val := reflect.ValueOf(destination).Elem()
+
+	// Map
+	if typ.Kind() == reflect.Map {
+		for k, v := range data {
+			val.SetMapIndex(reflect.ValueOf(k), reflect.ValueOf(v[0]))
+		}
+		return nil
+	}
+
+	// !struct
+	if typ.Kind() != reflect.Struct {
+		if tag == "param" || tag == "query" || tag == "header" {
+			// incompatible type, data is probably to be found in the body
+			return nil
+		}
+		return errors.New("binding element must be a struct")
+	}
+
+	for i := 0; i < typ.NumField(); i++ {
+		typeField := typ.Field(i)
+		structField := val.Field(i)
+		if typeField.Anonymous {
+			if structField.Kind() == reflect.Ptr {
+				structField = structField.Elem()
+			}
+		}
+		if !structField.CanSet() {
+			continue
+		}
+		structFieldKind := structField.Kind()
+		inputFieldName := typeField.Tag.Get(tag)
+		if typeField.Anonymous && structField.Kind() == reflect.Struct && inputFieldName != "" {
+			// if anonymous struct with query/param/form tags, report an error
+			return errors.New("query/param/form tags are not allowed with anonymous struct field")
+		}
+
+		if inputFieldName == "" {
+			// If tag is nil, we inspect if the field is a not BindUnmarshaler struct and try to bind data into it (might contains fields with tags).
+			// structs that implement BindUnmarshaler are binded only when they have explicit tag
+			if _, ok := structField.Addr().Interface().(BindUnmarshaler); !ok && structFieldKind == reflect.Struct {
+				if err := b.bindData(structField.Addr().Interface(), data, tag); err != nil {
+					return err
+				}
+			}
+			// does not have explicit tag and is not an ordinary struct - so move to next field
+			continue
+		}
+
+		inputValue, exists := data[inputFieldName]
+		if !exists {
+			// Go json.Unmarshal supports case insensitive binding.  However the
+			// url params are bound case sensitive which is inconsistent.  To
+			// fix this we must check all of the map values in a
+			// case-insensitive search.
+			for k, v := range data {
+				if strings.EqualFold(k, inputFieldName) {
+					inputValue = v
+					exists = true
+					break
+				}
+			}
+		}
+
+		if !exists {
+			continue
+		}
+
+		// Call this first, in case we're dealing with an alias to an array type
+		if ok, err := unmarshalField(typeField.Type.Kind(), inputValue[0], structField); ok {
+			if err != nil {
+				return err
+			}
+			continue
+		}
+
+		numElems := len(inputValue)
+		if structFieldKind == reflect.Slice && numElems > 0 {
+			sliceOf := structField.Type().Elem().Kind()
+			slice := reflect.MakeSlice(structField.Type(), numElems, numElems)
+			for j := 0; j < numElems; j++ {
+				if err := setWithProperType(sliceOf, inputValue[j], slice.Index(j)); err != nil {
+					return err
+				}
+			}
+			val.Field(i).Set(slice)
+		} else if err := setWithProperType(typeField.Type.Kind(), inputValue[0], structField); err != nil {
+			return err
+
+		}
+	}
+	return nil
+}
+
+func setWithProperType(valueKind reflect.Kind, val string, structField reflect.Value) error {
+	// But also call it here, in case we're dealing with an array of BindUnmarshalers
+	if ok, err := unmarshalField(valueKind, val, structField); ok {
+		return err
+	}
+
+	switch valueKind {
+	case reflect.Ptr:
+		return setWithProperType(structField.Elem().Kind(), val, structField.Elem())
+	case reflect.Int:
+		return setIntField(val, 0, structField)
+	case reflect.Int8:
+		return setIntField(val, 8, structField)
+	case reflect.Int16:
+		return setIntField(val, 16, structField)
+	case reflect.Int32:
+		return setIntField(val, 32, structField)
+	case reflect.Int64:
+		return setIntField(val, 64, structField)
+	case reflect.Uint:
+		return setUintField(val, 0, structField)
+	case reflect.Uint8:
+		return setUintField(val, 8, structField)
+	case reflect.Uint16:
+		return setUintField(val, 16, structField)
+	case reflect.Uint32:
+		return setUintField(val, 32, structField)
+	case reflect.Uint64:
+		return setUintField(val, 64, structField)
+	case reflect.Bool:
+		return setBoolField(val, structField)
+	case reflect.Float32:
+		return setFloatField(val, 32, structField)
+	case reflect.Float64:
+		return setFloatField(val, 64, structField)
+	case reflect.String:
+		structField.SetString(val)
+	default:
+		return errors.New("unknown type")
+	}
+	return nil
+}
+
+func unmarshalField(valueKind reflect.Kind, val string, field reflect.Value) (bool, error) {
+	switch valueKind {
+	case reflect.Ptr:
+		return unmarshalFieldPtr(val, field)
+	default:
+		return unmarshalFieldNonPtr(val, field)
+	}
+}
+
+func unmarshalFieldNonPtr(value string, field reflect.Value) (bool, error) {
+	fieldIValue := field.Addr().Interface()
+	if unmarshaler, ok := fieldIValue.(BindUnmarshaler); ok {
+		return true, unmarshaler.UnmarshalParam(value)
+	}
+	if unmarshaler, ok := fieldIValue.(encoding.TextUnmarshaler); ok {
+		return true, unmarshaler.UnmarshalText([]byte(value))
+	}
+
+	return false, nil
+}
+
+func unmarshalFieldPtr(value string, field reflect.Value) (bool, error) {
+	if field.IsNil() {
+		// Initialize the pointer to a nil value
+		field.Set(reflect.New(field.Type().Elem()))
+	}
+	return unmarshalFieldNonPtr(value, field.Elem())
+}
+
+func setIntField(value string, bitSize int, field reflect.Value) error {
+	if value == "" {
+		value = "0"
+	}
+	intVal, err := strconv.ParseInt(value, 10, bitSize)
+	if err == nil {
+		field.SetInt(intVal)
+	}
+	return err
+}
+
+func setUintField(value string, bitSize int, field reflect.Value) error {
+	if value == "" {
+		value = "0"
+	}
+	uintVal, err := strconv.ParseUint(value, 10, bitSize)
+	if err == nil {
+		field.SetUint(uintVal)
+	}
+	return err
+}
+
+func setBoolField(value string, field reflect.Value) error {
+	if value == "" {
+		value = "false"
+	}
+	boolVal, err := strconv.ParseBool(value)
+	if err == nil {
+		field.SetBool(boolVal)
+	}
+	return err
+}
+
+func setFloatField(value string, bitSize int, field reflect.Value) error {
+	if value == "" {
+		value = "0.0"
+	}
+	floatVal, err := strconv.ParseFloat(value, bitSize)
+	if err == nil {
+		field.SetFloat(floatVal)
+	}
+	return err
+}