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|
package mooh
import (
"regexp"
"strings"
)
type fn func(*Request) (Response, error)
type fns map[string]fn
type Route struct {
Method string
Path string
Code fn
Validations map[string]*regexp.Regexp
Defaults map[string]string
components []string
requiredNamedComponents map[string]bool
optionalNamedComponents map[string]bool
length int
lengthWithoutOptional int
}
type Match struct {
Path string
Route Route
Mapping map[string]string
Method string
}
var componentIsVariable = regexp.MustCompile("^:")
var componentsIsOptional = regexp.MustCompile("^\\?:")
var namedComponentsRegex = regexp.MustCompile("^:(.*)$")
var convertComponent = regexp.MustCompile("^\\??:(.*)$")
// XXX explain this function
func (self *Route) convertComponentName(name string) string {
newName := convertComponent.FindStringSubmatch(name)
if len(newName) == 0 {
return name
}
return newName[1]
}
func (self *Route) ValidateFor(key string, component string) bool {
return self.Validations[key].MatchString(component)
}
func (self *Route) Match(method string, components []string) *Match {
if self.Method != method {
return nil
}
if len(components) < self.lengthWithoutOptional || len(components) > self.length {
return nil
}
var mapping map[string]string
if self.Defaults != nil {
mapping = self.Defaults
}else{
mapping = map[string]string{}
}
currentComponentsLength := len(components)
L:
for i, c := range self.components {
convertedName := self.convertComponentName(c)
switch {
case self.IsOptionalUrlParameter(convertedName) == true:
if i < currentComponentsLength && self.HasValidationFor(convertedName) {
p := components[i]
if self.ValidateFor(convertedName, p) == true {
break L
}
} else {
break L
}
case self.IsRequiredUrlParameter(convertedName) == true:
p := components[i]
if self.HasValidationFor(convertedName) {
if self.ValidateFor(convertedName, p) == true {
mapping[convertedName] = p
} else {
return nil
}
} else {
mapping[convertedName] = p
}
default:
p := components[i]
if p != c {
return nil
}
}
}
return &Match{
Path: strings.Join(components, "/"),
Route: *self,
Method: method,
Mapping: mapping,
}
}
func (self *Route) Execute(request *Request) (Response, error) {
return self.Code(request)
}
func (self *Route) init() {
self.components = []string{}
for _, c := range strings.Split(self.Path, "/") {
self.components = append(self.components, c)
}
self.length = len(self.components)
self.getNamedComponents()
for k, _ := range self.Validations {
if self.IsUrlParameter(k) == false {
panic(k + " is missing")
}
}
}
func (self *Route) IsUrlParameter(component string) bool {
if self.IsRequiredUrlParameter(component) == false && self.IsOptionalUrlParameter(component) == false {
return false
}
return true
}
func (self *Route) IsRequiredUrlParameter(component string) bool {
return self.requiredNamedComponents[component]
}
func (self *Route) IsOptionalUrlParameter(component string) bool {
return self.optionalNamedComponents[component]
}
func (self *Route) HasValidationFor(component string) bool {
if self.Validations[component] != nil {
return true
}
return false
}
func (self *Route) getNamedComponents() {
self.requiredNamedComponents = map[string]bool{}
self.optionalNamedComponents = map[string]bool{}
for _, c := range self.components {
if namedComponentsRegex.MatchString(c) == true {
self.requiredNamedComponents[self.convertComponentName(c)] = true
} else if componentsIsOptional.MatchString(c) == true {
self.optionalNamedComponents[self.convertComponentName(c)] = true
}
}
self.lengthWithoutOptional = self.length - len(self.optionalNamedComponents)
}
|
