Wikipedia:Lua/Modul/JSONutil/en

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JSONutil – Module with functions for preparation and analysis of JSON code strings.

Line breaks and tabulators within string values will be accepted and converted.

Rather than a global “Invalid” message it will be tried to detect some typical errors and communicate them together with context.

Functions for templates

failsafe

Version ID: 2020-11-08

optional parameter 1 – required version, or keyword wikidata

Returns:

(empty), if minimal version condition not matched
local version otherwise, or registered on Wikidata (2020-11-08) when wikidata

Functions for Lua modules (API)

All functions described above can be used by other modules:

local lucky, JSONutil = pcall( require, "Module:JSONutil" )
if type( JSONutil ) == "table" then
    JSONutil = JSONutil.JSONutil()
else
    -- failure; JSONutil is the error message
    return "<span class=\"error\">" .. JSONutil .. "</span>"
end

Subsequently there are available:

JSONutil.failsafe(atleast)

Version ID

atleast
optional
nil or required version or "wikidata"

returns: string or false

JSONutil.fair(apply)

Reduce enhanced JSON data to strict JSON and analyse for errors.

apply
string with JSON code

returns: string or false

string with error keyword, or false if no complaints.
string with error context, or clean JSON code if no complaints.

JSONutil.fault(alert, add, adapt)

Retrieve formatted message in best language

alert
string with error keyword
add
optional
string with error context
adapt
optional – language preferences

returns: string with HTML error message.

JSONutil.fetch(apply, always, adapt)

Convert JSON robust into Lua

apply
string with JSON code
always
optional
true, if always preemptive test for free line format and strict JSON code being performed
Meaningful for migration HHVM→PHP7 2019 to discover problems also in HHVM mode.
adapt
optional – language preferences

returns: string or table

string with HTML error message in best language.
table with JSON data.

Language preferences

The argument adapt provides adaption of message language and might be one of these types:

function – Callback
- Return value is best message text
- Two arguments:
  1. table, with mapping: language code → message text
  2. string, optional, with message text if table fails
- i18n@Multilingual would work
string – space-separated list of preferred language codes
false/nil – project language, else English

Dependencies

None.

Usage

Useful for Lua programming only.

Internationalisation

commons:Data:I18n/Module:JSONutil.tab – Text elements
Error messages will be shown in user or project language, if available.