root
60 lines
2.4 KiB
JavaScript
60 lines
2.4 KiB
JavaScript
// Downlink viewer: hex dump of the ship's transmit buffer, with download.
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import { api } from './api.js';
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import { h, clear, toast, download } from './dom.js';
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import { hexView } from './hexview.js';
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export function downlinkView(ctx) {
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const ship = ctx.ship;
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const body = h('div', { class: 'panel-body' }, h('p', { class: 'dim' }, ship ? 'ACQUIRING SIGNAL...' : 'YOU HAVE NO SHIP.'));
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const meta = h('span', { class: 'dim' });
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const dl = h('button', { class: 'btn', type: 'button', disabled: true }, 'DOWNLOAD .BIN');
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const refresh = h('button', { class: 'btn', type: 'button', disabled: !ship }, 'REFRESH');
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let current = null;
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async function fetchIt() {
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if (!ship) return;
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refresh.disabled = true;
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try {
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const { bytes, day } = await api.downlink(ship.id);
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current = { bytes, day };
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const allZero = bytes.every((b) => b === 0);
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meta.textContent = `SHIP #${ship.id} // FROM THE RUN OF DAY ${day} // ${bytes.length} BYTES`;
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dl.disabled = false;
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clear(body).append(
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...(allZero ? [h('p', { class: 'warn' }, 'BUFFER IS ALL ZEROS: THE SHIP HAS NOT WRITTEN ANYTHING TO ITS DOWNLINK BUFFER.')] : []),
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hexView(bytes).el,
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h('p', { class: 'hint' }, 'OFFSETS ARE INTO THE 1 KB DOWNLINK BUFFER (SHIP RAM 1024-2047). MULTI-BYTE VALUES ARE LITTLE-ENDIAN.'),
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);
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} catch (e) {
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current = null;
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dl.disabled = true;
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meta.textContent = '';
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clear(body).append(
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e.status === 404
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? h('div', { class: 'nosignal' },
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h('p', { class: 'big' }, 'NO SIGNAL'),
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h('p', { class: 'dim' }, 'THIS SHIP HAS NOT TRANSMITTED YET. A SHIP\'S FIRST DOWNLINK ARRIVES AFTER ITS FIRST DAY IN THE BELT.'))
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: h('p', { class: 'bad' }, `ERROR: ${e.message}`),
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);
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} finally {
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refresh.disabled = false;
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}
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}
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// Reloading the account too keeps the ship's status and the day current.
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refresh.addEventListener('click', () => ctx.refresh().catch((e) => toast(e.message, 'err')));
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dl.addEventListener('click', () => {
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if (!current) return;
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download(`ship-${ship.id}-day-${current.day}-downlink.bin`, current.bytes);
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toast(`SAVED ${current.bytes.length} BYTES`);
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});
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fetchIt();
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return h('section', { class: 'panel' },
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h('div', { class: 'panel-title' }, 'DOWNLINK RECEIVER', h('span', { class: 'spacer' }), meta),
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h('div', { class: 'toolbar pad' }, refresh, h('span', { class: 'spacer' }), dl),
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body,
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);
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}
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