From 1604f876a89ec29b31fcb96ee6a78b3394480b67 Mon Sep 17 00:00:00 2001
From: Daniel Schmidt <info@daniel-schmidt.me>
Date: Sat, 31 Aug 2024 09:20:37 +0200
Subject: [PATCH] feat: optimize file loading in WASM

---
 cmd/game_wasm/index.html | 62 +++++++++++++++++++++++++++++++++++++++-
 internal/fs/fs_js.go     |  6 +++-
 2 files changed, 66 insertions(+), 2 deletions(-)

diff --git a/cmd/game_wasm/index.html b/cmd/game_wasm/index.html
index 6c2cabc..f24b0e7 100644
--- a/cmd/game_wasm/index.html
+++ b/cmd/game_wasm/index.html
@@ -197,6 +197,65 @@
                 term.onData((data) => bubbletea_write(data));
             }
 
+            function ensureAllFiles() {
+                // Wait for WASM to be loaded
+                if (!globalThis.version) {
+                    setTimeout(ensureAllFiles, 100);
+                    return;
+                }
+
+                // Clear cache if version mismatch
+                const lastVersion = globalThis.settings.getString("lastCachedVersion");
+                if (!lastVersion || lastVersion === "" || globalThis.version !== lastVersion) {
+                    console.log("Clearing file cache due to version mismatch");
+
+                    const keys = Object.keys(window.localStorage);
+                    for (const key of keys) {
+                        if (key.indexOf("assets") !== -1) {
+                            window.localStorage.removeItem(key);
+                        }
+                    }
+                }
+
+                // Cache files if they don't exist
+                fetch("./assets/file_index.json")
+                    .then((index) => index.json())
+                    .then((index) => {
+                        const promises = [];
+                        for (const file of index) {
+                            if (!file.isFile) {
+                                continue;
+                            }
+
+                            // only ensure files that end in .lua or .text
+                            if (!file.path.endsWith(".lua") && !file.path.endsWith(".txt")) {
+                                continue;
+                            }
+
+                            if (window.fsRead(file.path)) {
+                                continue;
+                            }
+
+                            promises.push(
+                                fetch(file.path)
+                                    .then((response) => response.text())
+                                    .then((text) => {
+                                        window.fsWrite(file.path, text);
+                                    }),
+                            );
+                        }
+
+                        if (promises.length === 0) {
+                            return;
+                        }
+
+                        Promise.all(promises).then(() => {
+                            console.log("All files loaded");
+                            globalThis.settings.set("lastCachedVersion", globalThis.version);
+                        });
+                    });
+            }
+
             function init() {
                 const go = new Go();
                 WebAssembly.instantiateStreaming(fetch("./eoe.wasm"), go.importObject).then((result) => {
@@ -206,10 +265,11 @@
                     });
 
                     // Init terminal. This should be done after bubbletea is initialized. For now, I use a timeout.
-                    document.fonts.load((globalThis.settings.getInt("font_size") ?? 14) + 'px "IosevkaTermNerdFontMono"').then(() => initTerminal());
+                    document.fonts.load((globalThis.settings.getInt("font_size") ?? 12) + 'px "IosevkaTermNerdFontMono"').then(() => initTerminal());
                 });
             }
 
+            ensureAllFiles();
             init();
         </script>
     </body>
diff --git a/internal/fs/fs_js.go b/internal/fs/fs_js.go
index 75bd221..9dce056 100644
--- a/internal/fs/fs_js.go
+++ b/internal/fs/fs_js.go
@@ -8,7 +8,6 @@ import (
 	"encoding/json"
 	"errors"
 	"fmt"
-	"github.com/samber/lo"
 	"io"
 	"net/http"
 	"os"
@@ -16,6 +15,9 @@ import (
 	"sort"
 	"strings"
 	"syscall/js"
+
+	"github.com/BigJk/end_of_eden/internal/git"
+	"github.com/samber/lo"
 )
 
 type noOpWriteCloser struct{}
@@ -51,6 +53,8 @@ func init() {
 		}
 		return nil
 	}))
+
+	js.Global().Set("version", git.Tag)
 }
 
 func ReadDir(path string) ([]FileInfo, error) {