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Merge pull request #485 from ripienaar/mappings
Support testing server mappings
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,101 @@ | ||
| // Copyright 2020 The NATS Authors | ||
| // Licensed under the Apache License, Version 2.0 (the "License"); | ||
| // you may not use this file except in compliance with the License. | ||
| // You may obtain a copy of the License at | ||
| // | ||
| // http://www.apache.org/licenses/LICENSE-2.0 | ||
| // | ||
| // Unless required by applicable law or agreed to in writing, software | ||
| // distributed under the License is distributed on an "AS IS" BASIS, | ||
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| // See the License for the specific language governing permissions and | ||
| // limitations under the License. | ||
|
|
||
| package cli | ||
|
|
||
| import ( | ||
| "fmt" | ||
|
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| "github.com/AlecAivazis/survey/v2" | ||
| "github.com/alecthomas/kingpin" | ||
| "github.com/nats-io/nats-server/v2/server" | ||
| ) | ||
|
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| type SrvMappingCmd struct { | ||
| src string | ||
| dest string | ||
| subj string | ||
| } | ||
|
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| func configureServerMappingCommand(srv *kingpin.CmdClause) { | ||
| c := &SrvMappingCmd{} | ||
|
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| m := srv.Command("mappings", "Test subject mapping patterns").Alias("mapping").Action(c.mappingAction) | ||
| m.Arg("source", "Source subject pattern").StringVar(&c.src) | ||
| m.Arg("dest", "Destination subject pattern").StringVar(&c.dest) | ||
| m.Arg("subject", "Subject to transform").StringVar(&c.subj) | ||
| } | ||
|
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| func (c *SrvMappingCmd) mappingAction(_ *kingpin.ParseContext) error { | ||
| if c.src == "" { | ||
| err := askOne(&survey.Input{ | ||
| Message: "Source subject pattern", | ||
| Help: "The pattern matching source subjects", | ||
| }, &c.src, survey.WithValidator(survey.Required)) | ||
| if err != nil { | ||
| return err | ||
| } | ||
| } | ||
|
|
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| if c.dest == "" { | ||
| err := askOne(&survey.Input{ | ||
| Message: "Destination subject pattern", | ||
| Help: "The pattern matching describing the mapping to test", | ||
| }, &c.dest, survey.WithValidator(survey.Required)) | ||
| if err != nil { | ||
| return err | ||
| } | ||
| } | ||
|
|
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| trans, err := server.NewSubjectTransformer(c.src, c.dest) | ||
| if err != nil { | ||
| return err | ||
| } | ||
|
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| transAndShow := func(trans server.SubjectTransformer, subj string) { | ||
| s, err := trans.Match(subj) | ||
| if err != nil { | ||
| fmt.Printf("Error: %v\n", err) | ||
| } | ||
|
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| fmt.Println(s) | ||
| fmt.Println() | ||
| } | ||
|
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| if c.subj != "" { | ||
| transAndShow(trans, c.subj) | ||
| return nil | ||
| } | ||
|
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| fmt.Println("Enter subjects to test, empty subject terminates.") | ||
| fmt.Println() | ||
|
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| for { | ||
| c.subj = "" | ||
| err = askOne(&survey.Input{ | ||
| Message: "Subject", | ||
| Help: "Enter a subject that matching source and the mapping will be shown", | ||
| }, &c.subj) | ||
| if err != nil { | ||
| return err | ||
| } | ||
|
|
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| if c.subj == "" { | ||
| break | ||
| } | ||
|
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| transAndShow(trans, c.subj) | ||
| } | ||
|
|
||
| return nil | ||
| } |
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