ducky/devices

Paddy 2015-12-22 Parent:a700ede02f91

18:b2fdf827758e Go to Latest

ducky/devices/vendor/code.secondbit.org/pqarrays.hg/parser.go

Add endpoint for retrieving devices. Add an endpoint for retrieving devices, either as a list or by ID. Stub endpoints for updating and deleting devices., along with TODOs marking them as things to still be completed. (Right now, accessing those endpoints is an insta-panic.) Simplify our handleCreateDevices by returning StatusUnauthorized if AuthUser fails, so we can reserve StatusForbidden for when auth succeeds but access is still denied. Also, delay the instantiation and allocation of a Response variable until we're actually going to use it. Create a handleGetDevices handler that authenticates the user, and if no ID is set, returns a list of all their Devices. If one or more IDs are set, only those Devices are returned. If ScopeViewPushToken is one of the scopes associated with the request, the push tokens for each Device will be included in the response. Otherwise, they will be omitted.

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1 package pqarrays
2
3 import (
4 "errors"
5 )
6
7 func parse(l *lexer) ([]*string, error) {
8 var parsed []*string
9 pchan := make(chan *string)
10 errchan := make(chan error)
11 done := make(chan struct{})
12 go runParse(l, pchan, errchan, done)
13 for {
14 select {
15 case err := <-errchan:
16 return parsed, err
17 case item := <-pchan:
18 parsed = append(parsed, item)
19 case <-done:
20 return parsed, nil
21 }
22 }
23 }
24
25 func runParse(l *lexer, parsed chan *string, err chan error, done chan struct{}) {
26 var state parseFunc = parseStart
27 for {
28 var e error
29 state, e = state(l, parsed)
30 if e != nil {
31 err <- e
32 break
33 }
34 if state == nil {
35 break
36 }
37 }
38 close(done)
39 }
40
41 type parseFunc func(*lexer, chan *string) (parseFunc, error)
42
43 func parseEOF(l *lexer, parsed chan *string) (parseFunc, error) {
44 tok := l.nextToken()
45 if tok.typ == tokenWhitespace {
46 tok = l.nextToken()
47 }
48 if tok.typ != tokenEOF {
49 return nil, errors.New("expected EOF, got " + tok.typ.String())
50 }
51 return nil, nil
52 }
53
54 func parseStringOrNull(l *lexer, parsed chan *string) (parseFunc, error) {
55 tok := l.nextToken()
56 if tok.typ == tokenWhitespace {
57 tok = l.nextToken()
58 } else if tok.typ == tokenString {
59 parsed <- &tok.val
60 return parseSeparatorOrDelim, nil
61 } else if tok.typ == tokenNull {
62 parsed <- nil
63 return parseSeparatorOrDelim, nil
64 }
65 return nil, errors.New("expected string, got " + tok.typ.String())
66 }
67
68 func parseSeparatorOrDelim(l *lexer, parsed chan *string) (parseFunc, error) {
69 tok := l.nextToken()
70 if tok.typ == tokenWhitespace {
71 return parseSeparatorOrDelim, nil
72 } else if tok.typ == tokenSeparator {
73 return parseStringOrNull, nil
74 } else if tok.typ == tokenArrayEnd {
75 return parseEOF, nil
76 }
77 return nil, errors.New("expected separator or delim, got " + tok.typ.String())
78 }
79
80 func parseStart(l *lexer, parsed chan *string) (parseFunc, error) {
81 tok := l.nextToken()
82 if tok.typ == tokenWhitespace {
83 return parseStart, nil
84 } else if tok.typ == tokenArrayStart {
85 return parseStringOrNull, nil
86 }
87 return nil, errors.New("expected separator or delim, got " + tok.typ.String())
88 }