From 461e38e134fff460acf75a49d321fb728a7ea238 Mon Sep 17 00:00:00 2001
From: Anirudh <anirudh@semiotic.ai>
Date: Mon, 28 Nov 2022 01:00:21 -0800
Subject: [PATCH] Julia implementation of the Gilded Rose kata

---
 julia/.gitignore     |  5 +++
 julia/gilded_rose.jl | 89 ++++++++++++++++++++++++++++++++++++++++++++
 julia/runtests.jl    | 16 ++++++++
 3 files changed, 110 insertions(+)
 create mode 100644 julia/.gitignore
 create mode 100644 julia/gilded_rose.jl
 create mode 100644 julia/runtests.jl

diff --git a/julia/.gitignore b/julia/.gitignore
new file mode 100644
index 00000000..20fe29d1
--- /dev/null
+++ b/julia/.gitignore
@@ -0,0 +1,5 @@
+*.jl.*.cov
+*.jl.cov
+*.jl.mem
+/Manifest.toml
+/docs/build/
diff --git a/julia/gilded_rose.jl b/julia/gilded_rose.jl
new file mode 100644
index 00000000..ae0c5c80
--- /dev/null
+++ b/julia/gilded_rose.jl
@@ -0,0 +1,89 @@
+import Base
+
+mutable struct Item{T<:Real}
+    name::String
+    sellin::T
+    quality::T
+end
+
+Base.show(io::IO, x::Item) = print(io, "$(x.name), $(x.sellin), $(x.quality)")
+
+struct GildedRose
+    items
+end
+
+function update_quality!(gr::GildedRose)
+    for item in gr.items
+        if item.name != "Aged Brie" && item.name != "Backstage passes to a TAFKAL80ETC concert"
+            if item.quality > 0
+                if item.name != "Sulfuras, Hand of Ragnaros"
+                    item.quality = item.quality - 1
+                end
+            end
+        else
+            if item.quality < 50
+                item.quality = item.quality + 1
+                if item.name == "Backstage passes to a TAFKAL80ETC concert"
+                    if item.sellin < 11
+                        if item.quality < 50
+                            item.quality = item.quality + 1
+                        end
+                    end
+                    if item.sellin < 6
+                        if item.quality < 50
+                            item.quality = item.quality + 1
+                        end
+                    end
+                end
+            end
+        end
+        if item.name != "Sulfuras, Hand of Ragnaros"
+            item.sellin = item.sellin - 1
+        end
+        if item.sellin < 0
+            if item.name != "Aged Brie"
+                if item.name != "Backstage passes to a TAFKAL80ETC concert"
+                    if item.quality > 0
+                        if item.name != "Sulfuras, Hand of Ragnaros"
+                            item.quality = item.quality - 1
+                        end
+                    end
+                else
+                    item.quality = item.quality - item.quality
+                end
+            else
+                if item.quality < 50
+                    item.quality = item.quality + 1
+                end
+            end
+        end
+    end
+    return nothing
+end
+
+# Technically, julia espouses a REPL-driven workflow, so the preferred way to run this
+# would be from the REPL. However, if you'd like to run this function from the
+# commandline, run `$ julia -e 'include("gilded_rose.jl"); main(;days=3)'` or whatever
+# number you want for `days`.
+function main(; days::Int64=2)
+    println("OMGHAI!")
+    items = [
+        Item("+5 Dexterity Vest", 10, 20),
+        Item("Aged Brie", 2, 0),
+        Item("Elixir of the Mongoose", 5, 7),
+        Item("Sulfuras, Hand of Ragnaros", 0, 80),
+        Item("Sulfuras, Hand of Ragnaros", -1, 80),
+        Item("Backstage passes to a TAFKAL80ETC concert", 15, 20),
+        Item("Backstage passes to a TAFKAL80ETC concert", 10, 49),
+        Item("Backstage passes to a TAFKAL80ETC concert", 5, 49),
+        Item("Conjured Mana Cake", 3, 6),
+    ]
+    for day in 1:days
+        println("-------- day $day --------")
+        println("name, sellin, quality")
+        for item in items
+            println(item)
+        end
+        update_quality!(GildedRose(items))
+    end
+end
diff --git a/julia/runtests.jl b/julia/runtests.jl
new file mode 100644
index 00000000..dca44f05
--- /dev/null
+++ b/julia/runtests.jl
@@ -0,0 +1,16 @@
+using Test
+
+# To run the tests, include this file into your REPL
+# julia> include("runtests.jl")
+
+include("gilded_rose.jl")
+
+@testset "gilded_rose.jl" begin
+
+    # Test foo
+    items = [Item("foo", 0, 0)]
+    gildedrose = GildedRose(items)
+    update_quality!(gildedrose)
+    @test items[1].name == "fixme"
+
+end