Module:GetJSON: Difference between revisions
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-- Create a Lua module named "p"
local p = {}
-- Define the main function of the module
p.main = function(frame)
-- Create a local table "m" to store data
local m = {}
-- Load JSON data from the first argument passed to the module
m.root = mw.loadJsonData(frame.args[1])
-- Function to split
local function splitKey(key)
local keys = {}
-- Split the key string by "."
for subkey in string.gmatch(key, "([^%.]+)") do
-- Insert each subkey into the keys table
table.insert(keys, subkey)
end
return keys -- Return the keys table
end
-- Function to get the value from the nested table using keys
local function getValueByKeys(root, keys)
local value = root
-- Iterate through each key
for _, key in ipairs(keys) do
-- Check if the key is numeric
if tonumber(key) then
key = tonumber(key) -- Convert numeric key to number
end
-- Check if the value associated with the key is nil
if value[key] == nil then
return nil -- Return nil if value is nil
end
value = value[key] -- Update value to the nested table
end
-- If the value is a table and contains json_file and json_key
if type(value) == "table" and value.json_file and value.json_key then
-- Load JSON data from the specified file
local newRoot = mw.loadJsonData(value.json_file)
-- Split the json_key string
local newKeys = splitKey(value.json_key)
-- Recursively call this function with new data
return getValueByKeys(newRoot, newKeys)
end
return value -- Return the final value
end
-- Split the key provided in the second argument
local keys = splitKey(frame.args[2])
-- Get the value from the nested table using the keys
local value = getValueByKeys(m.root, keys)
-- If the value is not nil
if value ~= nil then
-- If the value is a table
if type(value) == "table" then
-- If the fourth parameter is "keys"
if frame.args[4] == "keys" then
-- Return
local str = ""
for k, _ in pairs(value) do
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return frame:preprocess(str:sub(1, -2))
else
-- Return
local str = ""
for _, v in pairs(value) do
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end
end
return frame:preprocess(value) -- Return the value
else
-- If the third argument is not nil, return it
if frame.args[3] ~= nil then
return frame.args[3]
else
return "" -- Return an empty string if no value is found
end
end
end
-- Return the module table "p"
return p
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