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authorsanine <sanine.not@pm.me>2023-11-06 01:55:26 -0600
committersanine <sanine.not@pm.me>2023-11-06 01:55:26 -0600
commit41d720dbd78d91ac85239c8352cd479ec898f9e0 (patch)
tree49e4d73ed89fb6ab69c635525a8e4b1ce88b0b81 /src/world
parent541b103179cac2dc58962c52b5144b41f75316b0 (diff)
add cell.js
Diffstat (limited to 'src/world')
-rw-r--r--src/world/cell.js41
-rw-r--r--src/world/cell.test.js56
-rw-r--r--src/world/proposal.js8
3 files changed, 105 insertions, 0 deletions
diff --git a/src/world/cell.js b/src/world/cell.js
new file mode 100644
index 0000000..5783d72
--- /dev/null
+++ b/src/world/cell.js
@@ -0,0 +1,41 @@
+'use strict';
+
+export function cells_update(cells, update_rules) {
+ return cells
+ .map((row, y) => row.map((cell, x) => [x, y, cell.type]))
+ .flat()
+ .reduce((acc, [x, y, type]) => [...acc, update_rules[type](cells, x, y)], [])
+ .filter(x => x !== undefined)
+}
+
+
+export function cells_valid(cells, proposal) {
+ if (!proposal.world_updates) { return true; }
+ return proposal.world_updates.reduce(
+ (acc, update) => {
+ const valid =
+ (update.x >= 0 && update.x < cells[0].length) &&
+ (update.y >= 0 && update.y < cells.length) &&
+ (cells[update.y][update.x].type == update.from)
+ return valid && acc;
+ },
+ true
+ );
+}
+
+
+export function cells_apply(cells, proposals) {
+ return proposals.reduce(
+ (acc, prop) => {
+ const change = (prop.world_updates || []).reduce(
+ (acc_, update) => {
+ acc_[update.y][update.x].type = update.to;
+ return acc_
+ },
+ [...acc]
+ );
+ return change;
+ },
+ [...cells]
+ );
+}
diff --git a/src/world/cell.test.js b/src/world/cell.test.js
new file mode 100644
index 0000000..a3749e5
--- /dev/null
+++ b/src/world/cell.test.js
@@ -0,0 +1,56 @@
+'use strict';
+
+import { cells_update, cells_valid, cells_apply } from './cell.js';
+
+
+test("growth update rule", () => {
+ const cells = [[ { type: 'empty' }, { type: 'empty' }, { type: 'plant' } ]];
+ const update_rules = {
+ plant: () => {},
+ empty: (cells, x, y) => {
+ if (cells[y][x+1].type === 'plant') {
+ return { world_updates: [{ x, y, from: 'empty', to: 'plant' }] };
+ }
+ },
+ };
+
+ expect(cells_update(cells, update_rules)).toEqual([
+ { world_updates: [{ x: 1, y: 0, from: 'empty', to: 'plant' }] },
+ ]);
+
+ cells[0][1] = { type: 'plant' };
+
+ expect(cells_update(cells, update_rules)).toEqual([
+ { world_updates: [{ x: 0, y: 0, from: 'empty', to: 'plant' }] },
+ ]);
+
+ cells[0][0] = { type: 'plant' };
+
+ expect(cells_update(cells, update_rules)).toEqual([]);
+});
+
+
+test("growth update rule applied", () => {
+ const cells = [[ { type: 'empty' }, { type: 'empty' }, { type: 'plant' } ]];
+ expect(cells_apply(cells, [{ world_updates:[{ x: 1, y: 0, from: 'empty', to: 'plant' }]}])).toEqual([
+ [ { type: 'empty' }, { type: 'plant' }, { type: 'plant' } ],
+ ]);
+
+ expect(cells_apply(cells, [
+ { world_updates: [{ x: 2, y: 0, from: 'plant', to: 'empty' } ]},
+ { world_updates: [{ x: 1, y: 0, from: 'empty', to: 'plant' } ]},
+ { world_updates: [{ x: 0, y: 0, from: 'empty', to: 'plant' } ]},
+ ])).toEqual([
+ [ { type: 'plant' }, { type: 'plant' }, { type: 'empty' } ],
+ ]);
+});
+
+
+test("check proposals agains cells for validity", () => {
+ const cells = [[ { type: 'empty' }, { type: 'empty' }, { type: 'plant' } ]];
+ expect(cells_valid(cells, { world_updates: [{ x: -1, y: 0, from: 'blah', to: 'blah' }] })).toBe(false);
+ expect(cells_valid(cells, { world_updates: [{ x: 0, y: 0, from: 'blah', to: 'blah' }] })).toBe(false);
+ expect(cells_valid(cells, { world_updates: [{ x: 0, y: 0, from: 'empty', to: 'blah' }] })).toBe(true);
+ expect(cells_valid(cells, { world_updates: [{ x: 2, y: 0, from: 'empty', to: 'blah' }] })).toBe(false);
+ expect(cells_valid(cells, { world_updates: [{ x: 2, y: 1, from: 'empty', to: 'blah' }] })).toBe(false);
+});
diff --git a/src/world/proposal.js b/src/world/proposal.js
index d1f2eb0..775466c 100644
--- a/src/world/proposal.js
+++ b/src/world/proposal.js
@@ -10,6 +10,14 @@ import { pairs, deepEqual } from '../util.js';
* }
*/
+
+/* cell structure:
+ * {
+ * type: string
+ * flags: object
+ * }
+ */
+
/* action structure:
* {
* name: string,