Move update_quality into src/gilded_rose.gleam

gleam/src/cli.gleam

@@ -1,11 +1,12 @@
 import argv
+import gilded_rose_item.{type GildedRose}
 import gleam/function
 import gleam/io
 import glint
 import glint/flag
 import test_fixture.{simulate}
 
-pub fn run_cli_app() {
+pub fn run_cli_app(modify_inventory: fn(GildedRose) -> GildedRose) {
   let days_flag = "days"
 
   let number_of_days =
@@ -18,7 +19,7 @@ pub fn run_cli_app() {
 
     let assert Ok(number_of_days) =
       flag.get_int(from: input.flags, for: days_flag)
-    simulate(number_of_days)
+    simulate(number_of_days, modify_inventory)
   }
 
   let app =

gleam/src/gilded_rose.gleam

@@ -1,5 +1,108 @@
 import cli
+import gilded_rose_item.{type GildedRose, type Item, Item}
+import gleam/list
+
+pub fn update_quality(inventory: GildedRose) -> GildedRose {
+  let update_quality_item = fn(item: Item) {
+    let new_quality = case
+      item.name != "Aged Brie"
+      && item.name != "Backstage passes to a TAFKAL80ETC concert"
+    {
+      True -> {
+        case item.quality > 0 {
+          True ->
+            case item.name != "Sulfuras, Hand of Ragnaros" {
+              True -> item.quality - 1
+              False -> item.quality
+            }
+          False -> item.quality
+        }
+      }
+      False -> {
+        case item.quality < 50 {
+          True ->
+            item.quality
+            + 1
+            + case item.name == "Backstage passes to a TAFKAL80ETC concert" {
+              True ->
+                case item.sell_in < 11 {
+                  True -> {
+                    case item.quality < 49 {
+                      True ->
+                        1
+                        + case item.sell_in < 6 {
+                          True ->
+                            case item.quality < 48 {
+                              True -> 1
+                              False -> 0
+                            }
+                          False -> 0
+                        }
+                      False -> 0
+                    }
+                  }
+                  False -> 0
+                }
+              False -> 0
+            }
+          False -> item.quality
+        }
+      }
+    }
+
+    let new_sell_in = case item.name != "Sulfuras, Hand of Ragnaros" {
+      True -> item.sell_in - 1
+      False -> item.sell_in
+    }
+
+    case new_sell_in < 0 {
+      True ->
+        case item.name != "Aged Brie" {
+          True ->
+            case item.name != "Backstage passes to a TAFKAL80ETC concert" {
+              True ->
+                case new_quality > 0 {
+                  True ->
+                    case item.name != "Sulfuras, Hand of Ragnaros" {
+                      True ->
+                        Item(
+                          ..item,
+                          sell_in: new_sell_in,
+                          quality: new_quality - 1,
+                        )
+                      False -> Item(..item, sell_in: new_sell_in, quality: 80)
+                    }
+                  False ->
+                    Item(..item, sell_in: new_sell_in, quality: new_quality)
+                }
+              False ->
+                Item(
+                  ..item,
+                  sell_in: new_sell_in,
+                  quality: new_quality - new_quality,
+                )
+            }
+          False ->
+            case new_quality < 50 {
+              True ->
+                Item(..item, sell_in: new_sell_in, quality: new_quality + 1)
+              False -> Item(..item, sell_in: new_sell_in, quality: 50)
+            }
+        }
+      False ->
+        case item.name == "Sulfuras, Hand of Ragnaros" {
+          True -> Item(..item, sell_in: new_sell_in, quality: 80)
+          False ->
+            case new_quality > 50 {
+              True -> Item(..item, sell_in: new_sell_in, quality: 50)
+              False -> Item(..item, sell_in: new_sell_in, quality: new_quality)
+            }
+        }
+    }
+  }
+  list.map(inventory, update_quality_item)
+}
 
 pub fn main() {
-  cli.run_cli_app()
+  cli.run_cli_app(update_quality)
 }

gleam/src/gilded_rose_item.gleam

@@ -1,109 +1,6 @@
-import gleam/list
-
 pub type GildedRose =
   List(Item)
 
 pub type Item {
   Item(name: String, sell_in: Int, quality: Int)
 }
-
-pub fn update_quality(inventory: GildedRose) -> GildedRose {
-  let update_quality_item = fn(item: Item) {
-    let new_quality = case
-      item.name != "Aged Brie"
-      && item.name != "Backstage passes to a TAFKAL80ETC concert"
-    {
-      True -> {
-        case item.quality > 0 {
-          True ->
-            case item.name != "Sulfuras, Hand of Ragnaros" {
-              True -> item.quality - 1
-              False -> item.quality
-            }
-          False -> item.quality
-        }
-      }
-      False -> {
-        case item.quality < 50 {
-          True ->
-            item.quality
-            + 1
-            + case item.name == "Backstage passes to a TAFKAL80ETC concert" {
-              True ->
-                case item.sell_in < 11 {
-                  True -> {
-                    case item.quality < 49 {
-                      True ->
-                        1
-                        + case item.sell_in < 6 {
-                          True ->
-                            case item.quality < 48 {
-                              True -> 1
-                              False -> 0
-                            }
-                          False -> 0
-                        }
-                      False -> 0
-                    }
-                  }
-                  False -> 0
-                }
-              False -> 0
-            }
-          False -> item.quality
-        }
-      }
-    }
-
-    let new_sell_in = case item.name != "Sulfuras, Hand of Ragnaros" {
-      True -> item.sell_in - 1
-      False -> item.sell_in
-    }
-
-    case new_sell_in < 0 {
-      True ->
-        case item.name != "Aged Brie" {
-          True ->
-            case item.name != "Backstage passes to a TAFKAL80ETC concert" {
-              True ->
-                case new_quality > 0 {
-                  True ->
-                    case item.name != "Sulfuras, Hand of Ragnaros" {
-                      True ->
-                        Item(
-                          ..item,
-                          sell_in: new_sell_in,
-                          quality: new_quality - 1,
-                        )
-                      False -> Item(..item, sell_in: new_sell_in, quality: 80)
-                    }
-                  False ->
-                    Item(..item, sell_in: new_sell_in, quality: new_quality)
-                }
-              False ->
-                Item(
-                  ..item,
-                  sell_in: new_sell_in,
-                  quality: new_quality - new_quality,
-                )
-            }
-          False ->
-            case new_quality < 50 {
-              True ->
-                Item(..item, sell_in: new_sell_in, quality: new_quality + 1)
-              False -> Item(..item, sell_in: new_sell_in, quality: 50)
-            }
-        }
-      False ->
-        case item.name == "Sulfuras, Hand of Ragnaros" {
-          True -> Item(..item, sell_in: new_sell_in, quality: 80)
-          False ->
-            case new_quality > 50 {
-              True -> Item(..item, sell_in: new_sell_in, quality: 50)
-              False -> Item(..item, sell_in: new_sell_in, quality: new_quality)
-            }
-        }
-    }
-  }
-  list.map(inventory, update_quality_item)
-}

gleam/src/test_fixture.gleam

@@ -1,4 +1,4 @@
-import gilded_rose_item.{type GildedRose, type Item, Item, update_quality}
+import gilded_rose_item.{type GildedRose, type Item, Item}
 import gleam/int
 import gleam/io
 import gleam/list
@@ -15,7 +15,10 @@ const test_fixture = [
   Item("Conjured Mana Cake", 3, 6),
 ]
 
-pub fn simulate(number_of_days: Int) -> GildedRose {
+pub fn simulate(
+  number_of_days: Int,
+  modify_inventory: fn(GildedRose) -> GildedRose,
+) -> GildedRose {
   let days = list.range(0, number_of_days)
   let display_item = fn(item: Item) {
     string.join(
@@ -34,6 +37,6 @@ pub fn simulate(number_of_days: Int) -> GildedRose {
     ))
     io.println("name, sellIn, quality")
     list.each(inventory, fn(item) { io.println(display_item(item)) })
-    update_quality(inventory)
+    modify_inventory(inventory)
   })
 }

gleam/test/gilded_rose_test.gleam

@@ -1,4 +1,5 @@
-import gilded_rose_item.{Item, update_quality}
+import gilded_rose.{update_quality}
+import gilded_rose_item.{Item}
 import gleeunit
 import gleeunit/should