From 8caf1e7c430b4c0ea4236bcfcd5984a87e88659d Mon Sep 17 00:00:00 2001
From: Leon Talbert <leon.talbert@gmail.com>
Date: Mon, 28 Oct 2024 12:32:10 +0800
Subject: [PATCH] Resultify

---
 .../@molecules/SearchInput/SearchInput.tsx    |  4 +-
 src/pages/legacyfavourites.tsx                | 68 +++++++++++--------
 src/utils/utils.ts                            | 30 +++++++-
 3 files changed, 71 insertions(+), 31 deletions(-)

diff --git a/src/components/@molecules/SearchInput/SearchInput.tsx b/src/components/@molecules/SearchInput/SearchInput.tsx
index 770dd55d1..2377cc0a1 100644
--- a/src/components/@molecules/SearchInput/SearchInput.tsx
+++ b/src/components/@molecules/SearchInput/SearchInput.tsx
@@ -728,7 +728,7 @@ export const SearchInput = ({ size = 'extraLarge' }: { size?: 'medium' | 'extraL
       $state={state}
       data-testid="search-input-results"
     >
-      {dropdownItems.map((searchItem, index) => (
+      {/* {dropdownItems.map((searchItem, index) => (
         <SearchResult
           clickCallback={handleSearch}
           hoverCallback={setSelected}
@@ -742,7 +742,7 @@ export const SearchInput = ({ size = 'extraLarge' }: { size?: 'medium' | 'extraL
           }
           usingPlaceholder={searchItem.isHistory ? false : usingPlaceholder}
         />
-      ))}
+      ))} */}
     </SearchResultsContainer>
   )
 
diff --git a/src/pages/legacyfavourites.tsx b/src/pages/legacyfavourites.tsx
index 66a6b9a5b..e5963e050 100644
--- a/src/pages/legacyfavourites.tsx
+++ b/src/pages/legacyfavourites.tsx
@@ -1,7 +1,7 @@
 /* eslint-disable max-classes-per-file */
-import { Effect, pipe } from 'effect'
 import { Dispatch, ReactElement, SetStateAction, useEffect, useState } from 'react'
 import styled, { css } from 'styled-components'
+import { match } from 'ts-pattern'
 import { useChainId } from 'wagmi'
 
 import { truncateFormat } from '@ensdomains/ensjs/utils'
@@ -12,8 +12,17 @@ import { Spacer } from '@app/components/@atoms/Spacer'
 import { Outlink } from '@app/components/Outlink'
 import { Content } from '@app/layouts/Content'
 import { ContentGrid } from '@app/layouts/ContentGrid'
+import { thread } from '@app/utils/utils'
 
-const { try: EffectTry, flatMap, map, match, runSync, sync } = Effect
+type Result<T, E = undefined> = { ok: true; value: T } | { ok: false; error: E | undefined }
+
+const Ok = <T,>(data: T): Result<T, never> => {
+  return { ok: true, value: data }
+}
+
+const Err = <E,>(error?: E): Result<never, E> => {
+  return { ok: false, error }
+}
 
 const Container = styled.div(
   ({ theme }) => css`
@@ -59,51 +68,54 @@ type LegacyFavorite = {
 }
 
 // eslint-disable-next-line react/no-unused-prop-types
-type SimpleFavorite = { name: string; expiry: Date }
+type SimpleFavorite = { name: string; expiry: Date | null }
 
 class JsonParseError extends SyntaxError {}
 
-const invalidDateCheck = (favorite: SimpleFavorite) =>
-  favorite?.expiry?.toString() === 'Invalid Date' ? console.log('Invalid date') : null
-
 export const getLegacyFavorites = (): string =>
-  globalThis?.localStorage?.getItem('ensFavourites') || '{}'
+  globalThis?.localStorage?.getItem('ensFavourites') || '[]'
 
-export const simplifyLegacyFavorites = (legacyFavorites: any): SimpleFavorite[] => {
+export const simplifyLegacyFavorites = (
+  legacyFavoritesResult: LegacyFavorite[],
+): SimpleFavorite[] => {
+  const legacyFavorites = legacyFavoritesResult
   if (!legacyFavorites?.length) {
     return []
   }
-  return legacyFavorites.map((favorite: any) => ({
+  return legacyFavorites.map((favorite: LegacyFavorite) => ({
     name: favorite.name,
     expiry: favorite.expiryTime ? new Date(favorite.expiryTime) : null,
   }))
 }
 
-const jsonParseEffect = (input: string): Effect.Effect<LegacyFavorite[], JsonParseError> =>
-  EffectTry({
-    try: () => JSON.parse(input),
-    catch: (error) => new JsonParseError(error as string),
-  })
-
-const setFavoritesProgram = (setState: Dispatch<SetStateAction<SimpleFavorite[] | null>>) =>
-  pipe(
-    sync(getLegacyFavorites),
-    flatMap(jsonParseEffect),
-    map(simplifyLegacyFavorites),
-    // Easy to 'interrupt' the computation at any point and do stuff
-    Effect.tap((simpleLegacyFavorites) => simpleLegacyFavorites.map(invalidDateCheck)),
-    match({
-      onFailure: console.error,
-      onSuccess: setState,
-    }),
-  )
+const jsonParse = (input: string): Result<LegacyFavorite[], JsonParseError> => {
+  try {
+    return Ok(JSON.parse(input))
+  } catch (error) {
+    return Err(new JsonParseError(error as string))
+  }
+}
 
 export default function Page() {
   const [favorites, setFavorites] = useState<SimpleFavorite[] | null>(null)
   const chainId = useChainId()
 
   useEffect(() => {
-    runSync(setFavoritesProgram(setFavorites))
+    const result: Result<SimpleFavorite[]> = thread(
+      {},
+      getLegacyFavorites,
+      jsonParse,
+      simplifyLegacyFavorites,
+    )
+    match(result)
+      .with({ ok: true }, ({ value }) => {
+        setFavorites(value)
+      })
+      .with({ ok: false }, ({ error }) => {
+        console.error(error)
+        setFavorites([])
+      })
+      .exhaustive()
   }, [])
 
   return (
diff --git a/src/utils/utils.ts b/src/utils/utils.ts
index 022b8d89b..fd31735fc 100644
--- a/src/utils/utils.ts
+++ b/src/utils/utils.ts
@@ -184,6 +184,16 @@ export const createDateAndValue = <TValue extends bigint | number>(value: TValue
   value,
 })
 
+type Result<T, E = undefined> = { ok: true; value: T } | { ok: false; error: E | undefined }
+
+const Ok = <T>(data: T): Result<T, never> => {
+  return { ok: true, value: data }
+}
+
+const Err = <E>(error?: E): Result<never, E> => {
+  return { ok: false, error }
+}
+
 /*
   Following types are based on this solution: https://stackoverflow.com/questions/53173203/typescript-recursive-function-composition/53175538#53175538
   Best to just move on and not try to understand it. (This is copilot's opintion!)
@@ -204,4 +214,22 @@ type LaxReturnType<F> = F extends (...args: any) => infer R ? R : never
 export const thread = <F extends [(arg: any) => any, ...Array<(arg: any) => any>]>(
   arg: ArgType<F[0]>,
   ...f: F & AsChain<F>
-): LaxReturnType<Last<F>> => f.reduce((acc, fn) => fn(acc), arg) as LaxReturnType<Last<F>>
+): Result<LaxReturnType<Last<F>>, any> => {
+  try {
+    const rslt = f.reduce((acc, fn) => {
+      if (acc && typeof acc === 'object' && 'ok' in acc) {
+        if (!acc.ok) return acc
+        return fn(acc.value)
+      }
+      return fn(acc)
+    }, arg)
+
+    if (rslt && typeof rslt === 'object' && 'ok' in rslt) {
+      return rslt
+    }
+
+    return Ok(rslt)
+  } catch (e) {
+    return Err(e)
+  }
+}