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const filter = require('lodash/filter')
const get = require('lodash/get')
const map = require('lodash/map')
const paramsPattern = /\((.+)\)/
function parse(code) {
const params = filter(
get(code.match(paramsPattern), '[1]', '')
.split(',')
.map(s => s.trim())
)
return {
value: code.replace(paramsPattern, ''),
params: params.map(parse)
}
}
/**
* Parse a key binding into a nested structure of values and parameters
* @param {String} binding the raw bind string (e.g. `&kp LS(A)`)
* @returns {Array}
*/
function parseKeyBinding (binding) {
const value = binding.match(/^(&.+?)\b/)[1]
const paramBinds = filter(binding.replace(/^&.+?\b\s*/, '').split(' '))
const params = map(paramBinds, parse)
return { binding, value, params }
}
function parseKeymap (keymap) {
return Object.assign({}, keymap, {
layers: keymap.layers.map(layer => {
return layer.map(binding => {
return parseKeyBinding(binding, this.sources)
})
})
})
}
const { renderTable } = require('./layout')
const header = `
/*
* Copyright (c) 2020 The ZMK Contributors
*
* SPDX-License-Identifier: MIT
*/
/* THIS FILE WAS GENERATED!
*
* This file was generated automatically. You may or may not want to
* edit it directly.
*/
#include <behaviors.dtsi>
#include <dt-bindings/zmk/keys.h>
#include <dt-bindings/zmk/bt.h>
#include <dt-bindings/zmk/outputs.h>
`
function generateKeymap (layout, keymap) {
return {
code: generateKeymapCode(layout, keymap),
json: generateKeymapJSON(layout, keymap)
}
}
function generateKeymapCode (layout, keymap) {
const { layer_names: names = [] } = keymap
const layers = keymap.layers.map((layer, i) => {
const name = i === 0 ? 'default_layer' : `layer_${names[i] || i}`
const rendered = renderTable(layout, layer, {
linePrefix: '',
columnSeparator: ' '
})
return `
${name} {
bindings = <
${rendered}
>;
};
`
})
const keymapOut = `${header}
/ {
keymap {
compatible = "zmk,keymap";
${layers.join('')}
};
};
`
return keymapOut
}
function generateKeymapJSON (layout, keymap) {
const base = JSON.stringify(Object.assign({}, keymap, { layers: null }), null, 2)
const layers = keymap.layers.map(layer => {
const rendered = renderTable(layout, layer, {
useQuotes: true,
linePrefix: ' '
})
return `[\n${rendered}\n ]`
})
return base.replace('"layers": null', `"layers": [\n ${layers.join(', ')}\n ]`)
}
module.exports = {
parseKeymap,
generateKeymap
}
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