Minor things

6 files changed, 76 insertions, 16 deletions

diff --git a/u/deno.json b/u/deno.json
index 26b08bf..b277873 100644
--- a/u/deno.json
+++ b/u/deno.json
@@ -1,6 +1,5 @@
 {
   "name": "@emprespresso/pengueno",
   "version": "0.1.0",
-  "exports": "./mod.ts",
-  "workspace": ["./*"]
+  "exports": "./mod.ts"
 }
diff --git a/u/fn/either.ts b/u/fn/either.ts
index 8b233bf..b228af2 100644
--- a/u/fn/either.ts
+++ b/u/fn/either.ts
@@ -10,7 +10,7 @@ export interface IEither<E, T> {
     errBranch: Mapper<E, Ee>,
     okBranch: Mapper<T, Tt>,
   ) => IEither<Ee, Tt>;
-  fold: <Tt>(folder: BiMapper<E | undefined, T | undefined, Tt>) => Tt;
+  fold: <Tt>(folder: (err: E | undefined, val: T | undefined) => Tt) => Tt; //BiMapper<E | undefined, T | undefined, Tt>) => Tt;;
   moveRight: <Tt>(t: Tt) => IEither<E, Tt>;
   mapRight: <Tt>(mapper: Mapper<T, Tt>) => IEither<E, Tt>;
   mapLeft: <Ee>(mapper: Mapper<E, Ee>) => IEither<Ee, T>;
diff --git a/u/process/argv.ts b/u/process/argv.ts
new file mode 100644
index 0000000..657c9a7
--- /dev/null
+++ b/u/process/argv.ts
@@ -0,0 +1,65 @@
+import { Either, type IEither } from "@emprespresso/pengueno";
+
+export const isArgKey = <K extends string>(k: string): k is K =>
+  k.startsWith("--");
+
+export const getArg = <K extends string, V extends string>(
+  arg: K,
+  args: Array<K>,
+): IEither<Error, V> => {
+  const result = args.findIndex((_arg) => _arg.startsWith(arg));
+  if (result < 0) return Either.left(new Error("no argument found for " + arg));
+  const [resultArg, next]: Array<string | undefined> = [
+    args[result],
+    args.at(result + 1),
+  ];
+  if (resultArg && resultArg.includes("=")) {
+    return Either.right(resultArg.split("=")[1] as V);
+  }
+  if (typeof next === "undefined")
+    return Either.left(new Error("no value specified for " + arg));
+  if (isArgKey(next))
+    return Either.left(
+      new Error("next value for arg " + arg + " is another arg " + next),
+    );
+  return Either.right(next as V);
+};
+
+type ObjectFromList<T extends ReadonlyArray<string>, V = string> = {
+  [K in T extends ReadonlyArray<infer U> ? U : never]: V;
+};
+export const argv = <K extends string, V extends string>(
+  args: ReadonlyArray<K>,
+  defaultArgs?: Partial<Record<K, V>>,
+  argv = Deno.args,
+) => {
+  return args
+    .map((arg) => [arg, getArg(arg, argv)] as [K, IEither<Error, V>])
+    .map(([arg, specified]): [K, IEither<Error, V>] => [
+      arg,
+      specified.fold((e, val) => {
+        const hasDefaultVal = e && defaultArgs && arg in defaultArgs;
+        if (hasDefaultVal) {
+          return Either.right<Error, V>(defaultArgs[arg]!);
+        } else if (!val || e) {
+          return Either.left<Error, V>(e ?? new Error("unknown"));
+        }
+        return Either.right<Error, V>(val);
+      }),
+    ])
+    .reduce(
+      (
+        acc: IEither<Error, ObjectFromList<typeof args, V>>,
+        x: [K, IEither<Error, V>],
+      ): IEither<Error, ObjectFromList<typeof args, V>> => {
+        const [arg, eitherVal] = x;
+        return acc.flatMap((args) => {
+          return eitherVal.mapRight((envValue) => ({
+            ...args,
+            [arg]: envValue,
+          }));
+        });
+      },
+      Either.right({} as ObjectFromList<typeof args, V>),
+    );
+};
diff --git a/u/process/mod.ts b/u/process/mod.ts
index 3f02d46..211e9a7 100644
--- a/u/process/mod.ts
+++ b/u/process/mod.ts
@@ -1,3 +1,4 @@
 export * from "./env.ts";
 export * from "./run.ts";
 export * from "./validate_identifier.ts";
+export * from "./argv.ts";
diff --git a/u/server/activity/fourohfour.ts b/u/server/activity/fourohfour.ts
index c09aef6..ed8c7eb 100644
--- a/u/server/activity/fourohfour.ts
+++ b/u/server/activity/fourohfour.ts
@@ -7,14 +7,10 @@ import {
 } from "@emprespresso/pengueno";
 
 const messages = [
-  "(≧ω≦)ゞ Oopsie! This endpoint has gone a-404-dable!",
-  "｡ﾟ(｡ﾉωヽ｡)ﾟ｡ Meow-t found! Your API call ran away!",
-  "404-bidden! But like...in a cute way (・`ω´・) !",
-  "(=①ω①=) This endpoint is hiss-terically missing!",
-  "┐(´∀｀)┌ Whoopsie fluff! No API here!",
-  "(つ≧▽≦)つ Your data went on a paw-sible vacation!",
-  "(ꈍᴗꈍ) Uwu~ not found, but found our hearts instead!",
-  "ヽ(；▽；)ノ Eep! This route has ghosted you~",
+  "D: Meow-t found! Your API call ran away!",
+  "404-bidden! But like...in a cute way >:3 !",
+  ":o Your data went on a paw-sible vacation!",
+  "uwu~ not found, but found our hearts instead!",
 ];
 const randomFourOhFour = () => messages[Math.random() * messages.length];
 
diff --git a/u/server/request.ts b/u/server/request.ts
index 480ee69..c857f88 100644
--- a/u/server/request.ts
+++ b/u/server/request.ts
@@ -2,11 +2,10 @@ import { LogMetricTraceable } from "@emprespresso/pengueno";
 
 const greetings = [
   "hewwo :D",
-  "hiya cutie (✿◠‿◠)",
-  "boop! ૮・ᴥ・ა",
-  "sending virtual hugs! (づ｡◕‿‿◕｡)づ",
-  "stay pawsitive ₍^..^₎⟆",
-  "⋆｡‧˚❆🐧❆˚‧｡⋆",
+  "hiya cutie",
+  "boop!",
+  "sending virtual hugs!",
+  "stay pawsitive",
 ];
 const penguenoGreeting = () =>
   greetings[Math.floor(Math.random() * greetings.length)];