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teal-src/util/jsonpointer.tl @ 12276:7c5e6ad3d778
prosody.cfg.lua.dist: Warn about adding settings at the end of the file
It is very often a confusing mistake that leads to support questions
author | Kim Alvefur <zash@zash.se> |
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date | Sat, 17 Jul 2021 19:40:43 +0200 |
parent | 12131:b4c0efff8dd3 |
child | 12496:87c3d45208ef |
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local enum ptr_error "invalid-table" "invalid-path" end local function unescape_token(escaped_token : string) : string local unescaped = escaped_token:gsub("~1", "/"):gsub("~0", "~") return unescaped end local function resolve_json_pointer(ref : table, path : string) : any, ptr_error local ptr_len = #path+1 for part, pos in path:gmatch("/([^/]*)()") do local token = unescape_token(part) if not ref is table then return nil end local idx = next(ref) local new_ref : any if idx is string then new_ref = ref[token] elseif idx is integer then local i = tonumber(token) if token == "-" then i = #ref + 1 end new_ref = ref[i] else return nil, "invalid-table" end if pos as integer == ptr_len then return new_ref elseif new_ref is table then ref = new_ref elseif not ref is table then return nil, "invalid-path" end end return ref end return { resolve = resolve_json_pointer, }