prosody
7ae000fc8c07
util/jsonpointer.lua

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util/jsonpointer.lua @ 13267:7ae000fc8c07 0.12

mod_muc_mam: Improve wording of enable setting Suggested by jstein in the chat This option label is used by XMPP clients to explain what the option does. a) The user should know where the data is archived. b) The user needs a statement that can be enabled/disabled by the variable. A question would have the wrong logic here.
author Kim Alvefur <zash@zash.se>
date Sun, 15 Oct 2023 14:43:11 +0200
parent 12499:03e307952816
child 12781:22066b02887f
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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03e307952816 util.jsonpointer: Fix Lua <5.3 compat
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1 local m_type = math.type or function (n)
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2 return n % 1 == 0 and n <= 9007199254740992 and n >= -9007199254740992 and "integer" or "float";
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3 end;
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4
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5 local function unescape_token(escaped_token)
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6 local unescaped = escaped_token:gsub("~1", "/"):gsub("~0", "~")
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7 return unescaped
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8 end
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9
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10 local function resolve_json_pointer(ref, path)
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11 local ptr_len = #path + 1
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12 for part, pos in path:gmatch("/([^/]*)()") do
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13 local token = unescape_token(part)
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14 if not (type(ref) == "table") then
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15 return nil
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16 end
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17 local idx = next(ref)
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18 local new_ref
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19
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20 if type(idx) == "string" then
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21 new_ref = ref[token]
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22 elseif m_type(idx) == "integer" then
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23 local i = tonumber(token)
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24 if token == "-" then
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25 i = #ref + 1
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26 end
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27 new_ref = ref[i + 1]
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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 == ptr_len then
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33 return new_ref
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34 elseif type(new_ref) == "table" then
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35 ref = new_ref
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36 elseif not (type(ref) == "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 { resolve = resolve_json_pointer }