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message_schema.go
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message_schema.go
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// Copyright (C) 2014 Constantin Schomburg <me@cschomburg.com>
//
// Use of this source code is governed by an MIT-style
// license that can be found in the LICENSE file.
package nlp
import (
"sort"
"github.com/sarifsystems/sarif/sarif"
)
type MessageSchema struct {
Action string
Fields map[string]string
}
type byWeight []*Var
func (a byWeight) Len() int { return len(a) }
func (a byWeight) Swap(i, j int) { a[i], a[j] = a[j], a[i] }
func (a byWeight) Less(i, j int) bool { return a[i].Weight > a[j].Weight }
func (r *MessageSchema) Apply(vars []*Var) sarif.Message {
msg := sarif.Message{}
msg.Action = r.Action
pl := make(map[string]string)
sort.Sort(sort.Reverse(byWeight(vars)))
for _, v := range vars {
switch v.Name {
case "_action":
msg.Action = v.Value
case "text":
msg.Text = v.Value
case "to":
fallthrough
case "that":
if msg.Text == "" {
msg.Text = v.Value
}
default:
if _, ok := r.Fields[v.Name]; ok {
pl[v.Name] = v.Value
}
}
}
if len(vars) > 0 {
msg.EncodePayload(&pl)
}
return msg
}
type MessageSchemaStore struct {
Messages map[string]*MessageSchema
}
func NewMessageSchemaStore() *MessageSchemaStore {
return &MessageSchemaStore{
make(map[string]*MessageSchema),
}
}
func (s *MessageSchemaStore) Get(action string) *MessageSchema {
return s.Messages[action]
}
func (s *MessageSchemaStore) Set(schema *MessageSchema) {
s.Messages[schema.Action] = schema
}
func (s *MessageSchemaStore) Add(schema *MessageSchema) {
ex := s.Messages[schema.Action]
if ex == nil {
s.Set(schema)
return
}
for name, typ := range schema.Fields {
ex.Fields[name] = typ
}
}
func (s *MessageSchemaStore) AddMessage(msg *sarif.Message) {
schema := &MessageSchema{
Action: msg.Action,
Fields: make(map[string]string),
}
p := make(map[string]interface{})
msg.DecodePayload(&p)
for v, _ := range p {
schema.Fields[v] = "text"
}
s.Add(schema)
}
func (s *MessageSchemaStore) AddDataSet(set DataSet) {
for _, data := range set {
schema := &MessageSchema{
Action: data.Action,
Fields: make(map[string]string),
}
for _, v := range data.Vars {
schema.Fields[v.Name] = v.Type
}
s.Add(schema)
}
}