add Showdown calculator

.gitignore

@@ -11,3 +11,148 @@ htmlcov
 *.db
 cache/
 token
+
+# Created by https://www.toptal.com/developers/gitignore/api/node
+# Edit at https://www.toptal.com/developers/gitignore?templates=node
+
+### Node ###
+# Logs
+logs
+*.log
+npm-debug.log*
+yarn-debug.log*
+yarn-error.log*
+lerna-debug.log*
+.pnpm-debug.log*
+
+# Diagnostic reports (https://nodejs.org/api/report.html)
+report.[0-9]*.[0-9]*.[0-9]*.[0-9]*.json
+
+# Runtime data
+pids
+*.pid
+*.seed
+*.pid.lock
+
+# Directory for instrumented libs generated by jscoverage/JSCover
+lib-cov
+
+# Coverage directory used by tools like istanbul
+coverage
+*.lcov
+
+# nyc test coverage
+.nyc_output
+
+# Grunt intermediate storage (https://gruntjs.com/creating-plugins#storing-task-files)
+.grunt
+
+# Bower dependency directory (https://bower.io/)
+bower_components
+
+# node-waf configuration
+.lock-wscript
+
+# Compiled binary addons (https://nodejs.org/api/addons.html)
+build/Release
+
+# Dependency directories
+node_modules/
+jspm_packages/
+
+# Snowpack dependency directory (https://snowpack.dev/)
+web_modules/
+
+# TypeScript cache
+*.tsbuildinfo
+
+# Optional npm cache directory
+.npm
+
+# Optional eslint cache
+.eslintcache
+
+# Optional stylelint cache
+.stylelintcache
+
+# Microbundle cache
+.rpt2_cache/
+.rts2_cache_cjs/
+.rts2_cache_es/
+.rts2_cache_umd/
+
+# Optional REPL history
+.node_repl_history
+
+# Output of 'npm pack'
+*.tgz
+
+# Yarn Integrity file
+.yarn-integrity
+
+# dotenv environment variable files
+.env
+.env.development.local
+.env.test.local
+.env.production.local
+.env.local
+
+# parcel-bundler cache (https://parceljs.org/)
+.cache
+.parcel-cache
+
+# Next.js build output
+.next
+out
+
+# Nuxt.js build / generate output
+.nuxt
+dist
+
+# Gatsby files
+.cache/
+# Comment in the public line in if your project uses Gatsby and not Next.js
+# https://nextjs.org/blog/next-9-1#public-directory-support
+# public
+
+# vuepress build output
+.vuepress/dist
+
+# vuepress v2.x temp and cache directory
+.temp
+
+# Docusaurus cache and generated files
+.docusaurus
+
+# Serverless directories
+.serverless/
+
+# FuseBox cache
+.fusebox/
+
+# DynamoDB Local files
+.dynamodb/
+
+# TernJS port file
+.tern-port
+
+# Stores VSCode versions used for testing VSCode extensions
+.vscode-test
+
+# yarn v2
+.yarn/cache
+.yarn/unplugged
+.yarn/build-state.yml
+.yarn/install-state.gz
+.pnp.*
+
+### Node Patch ###
+# Serverless Webpack directories
+.webpack/
+
+# Optional stylelint cache
+
+# SvelteKit build / generate output
+.svelte-kit
+
+# End of https://www.toptal.com/developers/gitignore/api/node

bot.js

@@ -0,0 +1,2 @@
+import calc from "./calc";
+

bot.py

@@ -61,11 +61,30 @@ class BotClient(discord.Client):
 
     async def on_message(self, message: discord.Message):
         content = message.content
-        if self.is_replay(message):
+        if self.is_command(message):
+            await self.on_command(message)
+        elif self.is_replay(message):
             await self.on_replay(message)
         elif self.is_leaguefact(message):
             await self.on_leaguefact(message)
 
+    def is_command(self, message: discord.Message) -> bool:
+        return message.content.startswith("%")
+
+    async def on_command(self, message: discord.Message):
+        command = discord.message.split(" ")[0]
+        match command:
+            case "%calc":
+                reply = await _calculate(command[1:])
+                await message.reply(content=reply)
+            case _:
+                _log.info(f"Unrecognised command {command}")
+
+    async def _calculate(args: list[str]) -> str:
+        proc = sp.run(["node", "calc_main.js", "--"] + args)
+        msg = proc.stdout
+        return msg.strip()
+
     def is_replay(self, message: discord.Message) -> bool:
         if re.match("https://replay.pokemonshowdown.com/dl-.*", message.content):
             return True

calc.js

@@ -0,0 +1,299 @@
+import calc, {
+  calculate,
+  Generations,
+  Field,
+  Move,
+  Pokemon,
+} from "@smogon/calc";
+import assert from "assert";
+import chev, { Lexer } from "chevrotain";
+
+/**
+ * Creates a lexer.
+ *
+ * @returns {Lexer}
+ */
+function buildLexer() {
+  const Boost = chev.createToken({ name: "Boost", pattern: /[+-]\d+/ });
+  const EV = chev.createToken({ name: "EV", pattern: /\d+[+-]?/ });
+  const Stat = chev.createToken({
+    name: "Stat",
+    pattern: /HP|Atk|Def|SpA|SpD|Spe/,
+  });
+
+  const Item = chev.createToken({
+    name: "Item",
+    pattern: new RegExp(calc.ITEMS.flatMap((gen) => gen).join("|")),
+  });
+  const Ability = chev.createToken({
+    name: "Ability",
+    pattern: new RegExp(calc.ABILITIES.flatMap((gen) => gen).join("|")),
+  });
+
+  const Pokemon = chev.createToken({
+    name: "Pokemon",
+    pattern: new RegExp(
+      calc.SPECIES.flatMap((gen) => Object.keys(gen)).join("|")
+    ),
+  });
+  const Move = chev.createToken({
+    name: "Move",
+    pattern: new RegExp(
+      calc.MOVES.flatMap((gen) => Object.keys(gen)).join("|")
+    ),
+  });
+
+  const whitespace = chev.createToken({
+    name: "Whitespace",
+    pattern: /\s+/,
+    group: Lexer.SKIPPED,
+  });
+  const div = chev.createToken({
+    name: "div",
+    pattern: "/",
+    group: Lexer.SKIPPED,
+  });
+  const vs = chev.createToken({
+    name: "vs",
+    pattern: "vs.",
+  });
+
+  const terrainEnter = chev.createToken({
+    name: "terrainEnter",
+    pattern: "in",
+    push_mode: "terrain_mode",
+  });
+  const Weather = chev.createToken({
+    name: "Weather",
+    pattern: /Sun|Rain|Sand|Snow/,
+  });
+  const Terrain = chev.createToken({
+    name: "Terrain",
+    pattern: /(Electric|Grassy|Misty|Psychic) Terrain/,
+  });
+
+  const screenEnter = chev.createToken({
+    name: "screenEnter",
+    pattern: "through",
+    push_mode: "screen_mode",
+  });
+
+  return new Lexer({
+    modes: {
+      default_mode: [
+        whitespace,
+        div,
+        vs,
+        Boost,
+        EV,
+        Stat,
+        Item,
+        Ability,
+        Pokemon,
+        Move,
+        terrainEnter,
+        screenEnter,
+      ],
+      terrain_mode: [whitespace, screenEnter, Weather, Terrain],
+      screen_mode: [whitespace, Move],
+    },
+    defaultMode: "default_mode",
+  });
+}
+
+/**
+ * @generator
+ * @template T item type
+ * @param {T[]} arr
+ * @yields {T} item
+ */
+function* iterate(arr) {
+  for (const a of arr) {
+    yield a;
+  }
+}
+
+/**
+ * @param {string} type token type
+ * @param {chev.IToken} token token
+ * @return {string} matched token
+ */
+function unwrapToken(type, token) {
+  assert(
+    token.tokenType.name == type,
+    "expected token %s, got %s",
+    type,
+    token.tokenType.name
+  );
+  return token.image;
+}
+
+const POS_NATURES = {
+  atk: "Adamant",
+  def: "Bold",
+  spa: "Modest",
+  spd: "Calm",
+  spe: "Jolly",
+};
+
+const NEG_NATURES = {
+  atk: "Modest",
+  def: "Lonely",
+  spa: "Adamant",
+  spd: "Rash",
+  spe: "Brave",
+};
+
+/**
+ * Parses a Smogon calculator output:
+ *
+ * -2 8 SpA Choice Specs Torkoal vs.
+ * 252 HP / 4+ SpD Assault Vest Abomasnow
+ * in Sun
+ * through Light Screen
+ *
+ * @param {string} line textual line
+ * @return {calc.Result} calculation result
+ */
+function parseAndCalculate(line) {
+  const lexer = buildLexer();
+  const result = lexer.tokenize(line);
+  if (result.errors && result.errors.length > 0) {
+    console.error("Unparsed tokens: %o", result.errors);
+  }
+
+  /** @type {string} */
+  var attacker;
+  /** @type {string} */
+  var defender;
+
+  /** @type {calc.State.Pokemon} */
+  var attackerOpts = {};
+  /** @type {calc.State.Pokemon} */
+  var defenderOpts = {};
+
+  /** @type {string} */
+  var move;
+  /** @type {calc.State.Field} */
+  var field = {};
+
+  // Tokenising state.
+  var isAttacker = true;
+  var it = iterate(result.tokens);
+
+  const opts = () => (isAttacker ? attackerOpts : defenderOpts);
+
+  while (true) {
+    let item = it.next().value;
+    if (!item) break;
+    switch (item.tokenType.name) {
+      case "Boost":
+        {
+          let boost = unwrapToken("Boost", item);
+          let ev = unwrapToken("EV", it.next().value);
+          let stat = unwrapToken("Stat", it.next().value).toLowerCase();
+          opts().boosts = { [stat]: parseInt(boost), ...opts().boosts };
+          opts().evs = { [stat]: parseInt(ev), ...opts().evs };
+          if (ev.endsWith("+")) {
+            opts().nature = POS_NATURES[stat];
+          } else if (ev.endsWith("-")) {
+            opts().nature = NEG_NATURES[stat];
+          }
+        }
+        break;
+      case "EV":
+        {
+          let ev = unwrapToken("EV", item);
+          let stat = unwrapToken("Stat", it.next().value).toLowerCase();
+          opts().evs = { [stat]: parseInt(ev), ...opts().evs };
+          if (ev.endsWith("+")) {
+            opts().nature = POS_NATURES[stat];
+          } else if (ev.endsWith("-")) {
+            opts().nature = NEG_NATURES[stat];
+          }
+        }
+        break;
+      case "Stat":
+        throw Error("Impossibel state: bare Stat");
+      case "Item":
+        opts().item = unwrapToken("Item", item);
+        break;
+      case "Pokemon":
+        {
+          let name = unwrapToken("Pokemon", item);
+          if (isAttacker) attacker = name;
+          else defender = name;
+        }
+        break;
+      case "Move":
+        move = unwrapToken("Move", item);
+        break;
+      case "terrainEnter":
+        {
+          let next = it.next().value;
+          switch (next.tokenType.name) {
+            case "Weather":
+              field.weather = next.image;
+              break;
+            case "Terrain":
+              field.terrain = next.image;
+              break;
+            default:
+              throw Error(
+                "Unhandled terrain %s: %s",
+                next.tokenType.name,
+                next.image
+              );
+          }
+        }
+        break;
+      case "screenEnter":
+        {
+          let screen = unwrapToken("Move", it.next().value);
+          field.defenderSide = field.defenderSide || {};
+          field.defenderSide.isLightScreen = screen === "Light Screen";
+          field.defenderSide.isReflect = screen === "Reflect";
+          field.defenderSide.isAuroraVeil = screen === "Aurora Veil";
+          field.defenderSide.is;
+        }
+        break;
+      case "vs":
+        isAttacker = false;
+        break;
+      default:
+        console.error("unmatched token type: %s", item.tokenType.name);
+        break;
+    }
+  }
+
+  const gen = Generations.get(8);
+  return calculate(
+    gen,
+    new Pokemon(gen, attacker, attackerOpts),
+    new Pokemon(gen, defender, defenderOpts),
+    new Move(gen, move),
+    new Field(field)
+  );
+}
+
+function test() {
+  const text =
+    "-2 8 SpA Choice Specs Torkoal Overheat vs. 252 HP / 4+ SpD Assault Vest Abomasnow in Sun through Light Screen";
+  const res = parseAndCalculate(text);
+
+  assert(res.attacker.boosts.spa === -2, "should have -2 SpA");
+  assert(res.attacker.evs.spa === 8, "should have 8 SpA EVs");
+  assert(res.attacker.item === "Choice Specs", "should have Choice Specs");
+  assert(res.attacker.name === "Torkoal", "should be Torkoal");
+  assert(res.move.name === "Overheat", "should be Overheat");
+  assert(res.defender.evs.hp === 252, "should have 252 HP EVs");
+  assert(res.defender.evs.spd === 4, "should have 4 SpD EVs");
+  assert(res.field.weather === "Sun", "should be in sun");
+
+  assert(
+    res.desc().replace(/:.*/, "") === text,
+    "non-damage text should be equivalent to input"
+  );
+}
+
+export { parseAndCalculate, test };

calc_main.js

@@ -0,0 +1,8 @@
+import { parseAndCalculate } from "./calc.js";
+
+// FIXME: issue with using execArgv.
+let args = process.argv.slice(2);
+if (args[0] === "--") args = args.slice(1);
+const line = args.join(" ");
+const res = parseAndCalculate(line);
+console.log(res.fullDesc());

flake.nix

@@ -17,7 +17,11 @@
                   ps.requests
                 ]);
               in
-              [ python pkgs.sqlite ];
+              [
+                pkgs.nodejs
+                python
+                pkgs.sqlite
+              ];
           };
         });
 }

package-lock.json

@@ -0,0 +1,431 @@
+{
+  "name": "hhirls",
+  "version": "1.0.0",
+  "lockfileVersion": 3,
+  "requires": true,
+  "packages": {
+    "": {
+      "name": "hhirls",
+      "version": "1.0.0",
+      "license": "WTFPL",
+      "dependencies": {
+        "@smogon/calc": "^0.7.0",
+        "chevrotain": "^10.5.0",
+        "discord.js": "^14.9.0"
+      }
+    },
+    "node_modules/@chevrotain/cst-dts-gen": {
+      "version": "10.5.0",
+      "resolved": "https://registry.npmjs.org/@chevrotain/cst-dts-gen/-/cst-dts-gen-10.5.0.tgz",
+      "integrity": "sha512-lhmC/FyqQ2o7pGK4Om+hzuDrm9rhFYIJ/AXoQBeongmn870Xeb0L6oGEiuR8nohFNL5sMaQEJWCxr1oIVIVXrw==",
+      "dependencies": {
+        "@chevrotain/gast": "10.5.0",
+        "@chevrotain/types": "10.5.0",
+        "lodash": "4.17.21"
+      }
+    },
+    "node_modules/@chevrotain/gast": {
+      "version": "10.5.0",
+      "resolved": "https://registry.npmjs.org/@chevrotain/gast/-/gast-10.5.0.tgz",
+      "integrity": "sha512-pXdMJ9XeDAbgOWKuD1Fldz4ieCs6+nLNmyVhe2gZVqoO7v8HXuHYs5OV2EzUtbuai37TlOAQHrTDvxMnvMJz3A==",
+      "dependencies": {
+        "@chevrotain/types": "10.5.0",
+        "lodash": "4.17.21"
+      }
+    },
+    "node_modules/@chevrotain/types": {
+      "version": "10.5.0",
+      "resolved": "https://registry.npmjs.org/@chevrotain/types/-/types-10.5.0.tgz",
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+    },
+    "node_modules/@chevrotain/utils": {
+      "version": "10.5.0",
+      "resolved": "https://registry.npmjs.org/@chevrotain/utils/-/utils-10.5.0.tgz",
+      "integrity": "sha512-hBzuU5+JjB2cqNZyszkDHZgOSrUUT8V3dhgRl8Q9Gp6dAj/H5+KILGjbhDpc3Iy9qmqlm/akuOI2ut9VUtzJxQ=="
+    },
+    "node_modules/@discordjs/builders": {
+      "version": "1.6.1",
+      "resolved": "https://registry.npmjs.org/@discordjs/builders/-/builders-1.6.1.tgz",
+      "integrity": "sha512-CCcLwn/8ANhlAbhlE18fcaN0hfXTen53/JiwZs1t9oE/Cqa9maA8ZRarkCIsXF4J7J/MYnd0J6IsxeKsq+f6mw==",
+      "dependencies": {
+        "@discordjs/formatters": "^0.3.0",
+        "@discordjs/util": "^0.2.0",
+        "@sapphire/shapeshift": "^3.8.1",
+        "discord-api-types": "^0.37.37",
+        "fast-deep-equal": "^3.1.3",
+        "ts-mixer": "^6.0.3",
+        "tslib": "^2.5.0"
+      },
+      "engines": {
+        "node": ">=16.9.0"
+      }
+    },
+    "node_modules/@discordjs/collection": {
+      "version": "1.5.0",
+      "resolved": "https://registry.npmjs.org/@discordjs/collection/-/collection-1.5.0.tgz",
+      "integrity": "sha512-suyVndkEAAWrGxyw/CPGdtXoRRU6AUNkibtnbJevQzpelkJh3Q1gQqWDpqf5i39CnAn5+LrN0YS+cULeEjq2Yw==",
+      "engines": {
+        "node": ">=16.9.0"
+      }
+    },
+    "node_modules/@discordjs/formatters": {
+      "version": "0.3.0",
+      "resolved": "https://registry.npmjs.org/@discordjs/formatters/-/formatters-0.3.0.tgz",
+      "integrity": "sha512-Fc4MomalbP8HMKEMor3qUiboAKDtR7PSBoPjwm7WYghVRwgJlj5WYvUsriLsxeKk8+Qq2oy+HJlGTUkGvX0YnA==",
+      "dependencies": {
+        "discord-api-types": "^0.37.37"
+      },
+      "engines": {
+        "node": ">=16.9.0"
+      }
+    },
+    "node_modules/@discordjs/rest": {
+      "version": "1.7.0",
+      "resolved": "https://registry.npmjs.org/@discordjs/rest/-/rest-1.7.0.tgz",
+      "integrity": "sha512-r2HzmznRIo8IDGYBWqQfkEaGN1LrFfWQd3dSyC4tOpMU8nuVvFUEw6V/lwnG44jyOq+vgyDny2fxeUDMt9I4aQ==",
+      "dependencies": {
+        "@discordjs/collection": "^1.5.0",
+        "@discordjs/util": "^0.2.0",
+        "@sapphire/async-queue": "^1.5.0",
+        "@sapphire/snowflake": "^3.4.0",
+        "discord-api-types": "^0.37.37",
+        "file-type": "^18.2.1",
+        "tslib": "^2.5.0",
+        "undici": "^5.21.0"
+      },
+      "engines": {
+        "node": ">=16.9.0"
+      }
+    },
+    "node_modules/@discordjs/util": {
+      "version": "0.2.0",
+      "resolved": "https://registry.npmjs.org/@discordjs/util/-/util-0.2.0.tgz",
+      "integrity": "sha512-/8qNbebFzLWKOOg+UV+RB8itp4SmU5jw0tBUD3ifElW6rYNOj1Ku5JaSW7lLl/WgjjxF01l/1uQPCzkwr110vg==",
+      "engines": {
+        "node": ">=16.9.0"
+      }
+    },
+    "node_modules/@sapphire/async-queue": {
+      "version": "1.5.0",
+      "resolved": "https://registry.npmjs.org/@sapphire/async-queue/-/async-queue-1.5.0.tgz",
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+      "engines": {
+        "node": ">=v14.0.0",
+        "npm": ">=7.0.0"
+      }
+    },
+    "node_modules/@sapphire/shapeshift": {
+      "version": "3.8.2",
+      "resolved": "https://registry.npmjs.org/@sapphire/shapeshift/-/shapeshift-3.8.2.tgz",
+      "integrity": "sha512-NXpnJAsxN3/h9TqQPntOeVWZrpIuucqXI3IWF6tj2fWCoRLCuVK5wx7Dtg7pRrtkYfsMUbDqgKoX26vrC5iYfA==",
+      "dependencies": {
+        "fast-deep-equal": "^3.1.3",
+        "lodash": "^4.17.21"
+      },
+      "engines": {
+        "node": ">=v14.0.0",
+        "npm": ">=7.0.0"
+      }
+    },
+    "node_modules/@sapphire/snowflake": {
+      "version": "3.4.2",
+      "resolved": "https://registry.npmjs.org/@sapphire/snowflake/-/snowflake-3.4.2.tgz",
+      "integrity": "sha512-KJwlv5gkGjs1uFV7/xx81n3tqgBwBJvH94n1xDyH3q+JSmtsMeSleJffarEBfG2yAFeJiFA4BnGOK6FFPHc19g==",
+      "engines": {
+        "node": ">=v14.0.0",
+        "npm": ">=7.0.0"
+      }
+    },
+    "node_modules/@smogon/calc": {
+      "version": "0.7.0",
+      "resolved": "https://registry.npmjs.org/@smogon/calc/-/calc-0.7.0.tgz",
+      "integrity": "sha512-2+AGILYtqwRBceIIYkxH1dvtLwzSdyEwAAFWDfjYVwwNohmsNKjU5RVsDal8matpmNJptHF2FekSbHONNZTlUg==",
+      "dependencies": {
+        "@types/node": "^18.11.9"
+      }
+    },
+    "node_modules/@tokenizer/token": {
+      "version": "0.3.0",
+      "resolved": "https://registry.npmjs.org/@tokenizer/token/-/token-0.3.0.tgz",
+      "integrity": "sha512-OvjF+z51L3ov0OyAU0duzsYuvO01PH7x4t6DJx+guahgTnBHkhJdG7soQeTSFLWN3efnHyibZ4Z8l2EuWwJN3A=="
+    },
+    "node_modules/@types/node": {
+      "version": "18.16.1",
+      "resolved": "https://registry.npmjs.org/@types/node/-/node-18.16.1.tgz",
+      "integrity": "sha512-DZxSZWXxFfOlx7k7Rv4LAyiMroaxa3Ly/7OOzZO8cBNho0YzAi4qlbrx8W27JGqG57IgR/6J7r+nOJWw6kcvZA=="
+    },
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+}

package.json

@@ -0,0 +1,18 @@
+{
+  "name": "hhirls",
+  "version": "1.0.0",
+  "description": "Pokemon Showdown data processing, mostly for HHIRLLL's Pokemon league. Ugly as fuck.",
+  "main": "calc.js",
+  "type": "module",
+  "scripts": {
+    "calc": "node calc_main.js",
+    "test": "node -e 'import(\"./calc.js\").then(mod => mod.test())'"
+  },
+  "author": "",
+  "license": "WTFPL",
+  "dependencies": {
+    "@smogon/calc": "^0.7.0",
+    "chevrotain": "^10.5.0",
+    "discord.js": "^14.9.0"
+  }
+}