guessing game auto-tracking

[alttp.git] / resources / js / helpers / alttp-ram.js

diff --git a/resources/js/helpers/alttp-ram.js b/resources/js/helpers/alttp-ram.js
new file mode 100644 (file)
index 0000000..2ae71cf
--- /dev/null
+++ b/resources/js/helpers/alttp-ram.js
@@ -0,0 +1,100 @@
+export const isChestOpen = (data, room, chest) => {
+       if (chest < 4) {
+               return !!(data && (data[2 * room] & Math.pow(2, chest + 4)));
+       } else {
+               return !!(data && (data[(2 * room) + 1] & Math.pow(2, chest - 4)));
+       }
+};
+
+export const hasVisitedQuadrant = (data, room, quadrant) => {
+       return !!(data && (data[2 * room] & Math.pow(2, quadrant - 1)));
+};
+
+export const GT_BASEMENT_CHECKS = [
+       'iceM',
+       'iceL',
+       'iceR',
+       'dmUL',
+       'dmUR',
+       'dmBL',
+       'dmBR',
+       'randoUL',
+       'randoUR',
+       'randoBL',
+       'randoBR',
+       'fireSnake',
+       'mapChest',
+       'hopeL',
+       'hopeR',
+       'bobsChest',
+       'torchSeen',
+       'tileRoom',
+       'compassUL',
+       'compassUR',
+       'compassBL',
+       'compassBR',
+];
+
+export const GT_BASEMENT_ALL = [
+       'iceM',
+       'iceL',
+       'iceR',
+       'dmUL',
+       'dmUR',
+       'dmBL',
+       'dmBR',
+       'randoUL',
+       'randoUR',
+       'randoBL',
+       'randoBR',
+       'fireSnake',
+       'mapChest',
+       'hopeL',
+       'hopeR',
+       'bobsChest',
+       'torch',
+       'torchSeen',
+       'tileRoom',
+       'compassUL',
+       'compassUR',
+       'compassBL',
+       'compassBR',
+];
+
+export const getGTBasementState = (data) => ({
+       iceM: isChestOpen(data, 0x1C, 0),
+       iceL: isChestOpen(data, 0x1C, 1),
+       iceR: isChestOpen(data, 0x1C, 2),
+       dmUL: isChestOpen(data, 0x7B, 0),
+       dmUR: isChestOpen(data, 0x7B, 1),
+       dmBL: isChestOpen(data, 0x7B, 2),
+       dmBR: isChestOpen(data, 0x7B, 3),
+       randoUL: isChestOpen(data, 0x7C, 0),
+       randoUR: isChestOpen(data, 0x7C, 1),
+       randoBL: isChestOpen(data, 0x7C, 2),
+       randoBR: isChestOpen(data, 0x7C, 3),
+       fireSnake: isChestOpen(data, 0x7D, 0),
+       mapChest: isChestOpen(data, 0x8B, 0),
+       hopeL: isChestOpen(data, 0x8C, 1),
+       hopeR: isChestOpen(data, 0x8C, 2),
+       bobsChest: isChestOpen(data, 0x8C, 3),
+       torchSeen: hasVisitedQuadrant(data, 0x8C, 4),
+       torch: isChestOpen(data, 0x8C, 6),
+       tileRoom: isChestOpen(data, 0x8D, 0),
+       compassUL: isChestOpen(data, 0x9D, 0),
+       compassUR: isChestOpen(data, 0x9D, 1),
+       compassBL: isChestOpen(data, 0x9D, 2),
+       compassBR: isChestOpen(data, 0x9D, 3),
+});
+
+export const countGTBasementState = (state) =>
+       GT_BASEMENT_CHECKS.reduce((acc, cur) => state[cur] ? acc + 1 : acc, 0);
+
+export const compareGTBasementState = (prev, cur) => {
+       for (let i = 0; i < GT_BASEMENT_ALL.length; ++i) {
+               if (prev[GT_BASEMENT_ALL[i]] !== cur[GT_BASEMENT_ALL[i]]) {
+                       return GT_BASEMENT_ALL[i];
+               }
+       }
+       return '';
+};