prosody
73ecfe811526
teal-src/util/jsonpointer.tl

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teal-src/util/jsonpointer.tl @ 12243:73ecfe811526

util.startup: Teach prosodyctl to be --quiet as complement to --verbose Original motivation was tiresome warnings about Lua 5.4 not being supported yet. Can still be handy to tweak log level, e.g. to prevent logging to interfere with command output.
author Kim Alvefur <zash@zash.se>
date Sun, 28 Nov 2021 23:07:35 +0100
parent 12131:b4c0efff8dd3
child 12496:87c3d45208ef
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12131
b4c0efff8dd3 util.jsonpointer: Resolve JSON Pointers per RFC 6901
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1
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2 local enum ptr_error
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3 "invalid-table"
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4 "invalid-path"
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5 end
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6
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7 local function unescape_token(escaped_token : string) : string
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8 local unescaped = escaped_token:gsub("~1", "/"):gsub("~0", "~")
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9 return unescaped
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10 end
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12 local function resolve_json_pointer(ref : table, path : string) : any, ptr_error
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13 local ptr_len = #path+1
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14 for part, pos in path:gmatch("/([^/]*)()") do
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15 local token = unescape_token(part)
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16 if not ref is table then
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17 return nil
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18 end
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19 local idx = next(ref)
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20 local new_ref : any
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21
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22 if idx is string then
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23 new_ref = ref[token]
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24 elseif idx is integer then
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25 local i = tonumber(token)
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26 if token == "-" then i = #ref + 1 end
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27 new_ref = ref[i]
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28 else
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29 return nil, "invalid-table"
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30 end
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31
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32 if pos as integer == ptr_len then
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33 return new_ref
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34 elseif new_ref is table then
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35 ref = new_ref
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36 elseif not ref is table then
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37 return nil, "invalid-path"
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38 end
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40 end
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41 return ref
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42 end
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43
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44 return {
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45 resolve = resolve_json_pointer,
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46 }