led-bot/lights/light_parser.js
2020-11-07 22:29:13 -05:00

137 lines
3 KiB
JavaScript

import Logger, { levels } from '../logger.js';
import { filename } from '../utils.js';
const log = new Logger(filename(import.meta.url), levels.PANIC);
class Target {
constructor(channel) {
this.channel = channel;
}
channel;
value;
}
const available_targets = {
r: new Target('r'),
g: new Target('g'),
b: new Target('b'),
stack: new Target('stack'),
};
class Instruction {
constructor(name, targets, args) {
let valid_targets = [];
targets.forEach((t) => {
if (t instanceof Target) {
let match = Object.keys(available_targets).find((key) => available_targets[key].channel === t.channel);
if (match) {
valid_targets.push(t);
}
}
});
this.name = name;
this.targets = valid_targets;
this.args = args;
}
name;
targets;
args;
}
export const instructions = [
{ n: 'CONSTANT', a: true },
{ n: 'ADD', a: true },
{ n: 'SUB', a: true },
{ n: 'RAND', a: false },
];
export function initialize(ctx) {
log.s(ctx.log_level);
}
function parseSingleInstruction(str = '') {
let item = {
valid: false,
instruction: undefined,
errors: undefined,
};
let split = str.split(' ');
let cmd = split[0];
let match = instructions.filter((i) => i.n == cmd.toUpperCase());
split = split.slice(1);
if (match.length) {
let inst_targets = [];
let inst_args = [];
let parsed_args = [];
let join_index = -1;
let add = true;
for (let index in split) {
if (split[index].startsWith('[')) {
join_index = index;
add = false;
}
if (add) {
parsed_args.push(split[index]);
}
if (split[index].endsWith(']') && join_index != -1) {
let joined = split
.slice(join_index, index + 1)
.join(' ')
.replace(/[\[\]]/g, '');
parsed_args.push(joined);
add = true;
join_index = -1;
}
}
inst_targets = parsed_args[0]
.split(',')
.map((s) => s.trim())
.map((t) => new Target(t));
if (!inst_targets.length) {
item.errors = 'No valid targets.';
}
inst_targets.forEach((t) => {
let match = Object.keys(available_targets).find((key) => available_targets[key].channel === t.channel);
if (!match) {
item.errors = `Invalid target: ${t.channel}`;
}
});
if (match[0].a) {
if (parsed_args.length < 2) {
item.errors = 'Not enough arguments.';
return item;
}
inst_args = parsed_args[1].split(',').map((s) => (s == 'stack' ? 'stack' : parseInt(s.trim())));
if (!inst_args.length) {
item.errors = 'No valid args.';
}
inst_args.forEach((arg) => {
if (!arg) {
item.errors = 'An argument is null or undefined.';
}
});
}
if (item.errors) {
return item;
}
item.instruction = new Instruction(match[0].n, inst_targets, inst_args || []);
} else {
item.errors = 'No command matched.';
return item;
}
item.valid = true;
return item;
}
export default function parse(str) {
let parsed = [];
let split = str.split('\n');
split.forEach((item) => {
let parsedItem = parseSingleInstruction(item);
parsed.push(parsedItem);
log.debug(item);
});
return parsed;
}