OpenTally/html/worker.js

105 lines
2.9 KiB
JavaScript

importScripts('opentally.js');
var wasm = wasm_bindgen;
async function initWasm() {
await wasm_bindgen('opentally_bg.wasm');
postMessage({'type': 'init', 'version': wasm.version()});
}
initWasm();
var numbers, election, opts, state, stageNum;
onmessage = function(evt) {
if (evt.data.type === 'countElection') {
if (evt.data.numbers === 'fixed') {
numbers = 'Fixed';
wasm.fixed_set_dps(evt.data.decimals);
} else if (evt.data.numbers === 'gfixed') {
numbers = 'GuardedFixed';
wasm.gfixed_set_dps(evt.data.decimals);
} else if (evt.data.numbers === 'float64') {
numbers = 'NativeFloat64';
} else if (evt.data.numbers === 'rational') {
numbers = 'Rational';
} else {
throw 'Unknown --numbers';
}
// Init election
election = wasm['election_from_blt_' + numbers](evt.data.bltData);
if (evt.data.normaliseBallots) {
wasm['election_normalise_ballots_' + numbers](election);
}
// Init constraints if applicable
if (evt.data.conData) {
wasm['election_load_constraints_' + numbers](election, evt.data.conData);
}
// Init STV options
opts = wasm.STVOptions.new.apply(null, evt.data.optsStr);
// Validate options
opts.validate();
// Describe count
postMessage({'type': 'describeCount', 'content': wasm['describe_count_' + numbers](evt.data.bltPath, election, opts)});
// Init results table
postMessage({'type': 'initResultsTable', 'content': wasm['init_results_table_' + numbers](election, opts)});
// Step election
state = wasm['CountState' + numbers].new(election);
wasm['count_init_' + numbers](state, opts);
postMessage({'type': 'updateResultsTable', 'result': wasm['update_results_table_' + numbers](1, state, opts)});
postMessage({'type': 'updateStageComments', 'comment': wasm['update_stage_comments_' + numbers](state)});
stageNum = 2;
resume_count();
} else if (evt.data.type == 'userInput') {
user_input_buffer = evt.data.response;
resume_count();
}
}
function resume_count() {
for (;; stageNum++) {
try {
let isDone = wasm['count_one_stage_' + numbers](state, opts);
if (isDone) {
break;
}
} catch (ex) {
if (ex === "RequireInput") {
return;
} else {
throw ex;
}
}
postMessage({'type': 'updateResultsTable', 'result': wasm['update_results_table_' + numbers](stageNum, state, opts)});
postMessage({'type': 'updateStageComments', 'comment': wasm['update_stage_comments_' + numbers](state)});
}
postMessage({'type': 'updateResultsTable', 'result': wasm['finalise_results_table_' + numbers](state)});
postMessage({'type': 'finalResultSummary', 'summary': wasm['final_result_summary_' + numbers](state, opts)});
}
var user_input_buffer = null;
function read_user_input_buffer(message) {
if (user_input_buffer === null) {
postMessage({'type': 'requireInput', 'message': message});
return null;
} else {
let user_input = user_input_buffer;
user_input_buffer = null;
return user_input;
}
}