prosody
bad813103cd4
teal-src/util/jsonpointer.tl

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teal-src/util/jsonpointer.tl @ 12352:bad813103cd4

prosody.cfg.lua.dist: Remove comment about mod_*.lua above modules_enabled This is a very old statement, but people generally don't need to check for the files, and shouldn't be encouraged to put them in Prosody's source dir. The installer will be the way forward for most people, and hg for the rest. Manually moving files into the right place is not something most users should be doing.
author Matthew Wild <mwild1@gmail.com>
date Thu, 03 Mar 2022 10:24:59 +0000
parent 12131:b4c0efff8dd3
child 12496:87c3d45208ef
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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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39
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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 }