feat: initial functional release of Stock Pignon

2026-05-10 19:12:26 +00:00 · 2026-01-14 18:42:53 +01:00
commit 5b8502400a
106 changed files with 2147 additions and 0 deletions
--- a/app/src/main/java/com/stock/pignon/DataLoader.java
+++ b/app/src/main/java/com/stock/pignon/DataLoader.java
@@ -0,0 +1,84 @@
+// DataLoader.java
+package com.stock.pignon;
+
+import android.os.Environment;
+import android.util.Log;
+import com.google.gson.Gson;
+import java.io.File;
+import java.io.FileInputStream;
+import java.io.InputStreamReader;
+import java.util.ArrayList;
+import java.util.List;
+
+public class DataLoader {
+    private static final String TAG = "DataLoader"; // For readable logs
+    private static final String EXTERNAL_DIR = Config.EXTERNAL_DIR_NAME;
+    private static final String PIECES_FILE = Config.PIECES_FILE_NAME;
+
+    // Raw data
+    private static List<Category> cachedCategories = new ArrayList<>();
+    private static List<Item> cachedGlobals = new ArrayList<>();
+
+
+    public static void loadData() {
+        File dir = new File(Environment.getExternalStorageDirectory(), EXTERNAL_DIR);
+        File jsonFile = new File(dir, PIECES_FILE);
+
+        // Check if file exist
+        if (!jsonFile.exists()) {
+            Log.e(TAG, "File doesn't exist : " + jsonFile.getAbsolutePath());
+            return;
+        }
+
+        // Optimized read
+        // Try-with-resources ensures streams are automatically closed, avoid memory leaks
+        try (FileInputStream fis = new FileInputStream(jsonFile);
+             @SuppressWarnings("CharsetObjectCanBeUsed")
+             InputStreamReader reader = new InputStreamReader(fis, "UTF-8")) {
+
+            // From json to java object
+            Gson gson = new Gson();
+            // Internal class needed for Gson
+            CategoriesWrapper wrapper = gson.fromJson(reader, CategoriesWrapper.class);
+
+            // Extract lists from wrapper with null-safety
+            if (wrapper != null) {
+                cachedGlobals = wrapper.globalItems != null ? wrapper.globalItems : new ArrayList<>();
+                cachedCategories = wrapper.categories != null ? wrapper.categories : new ArrayList<>();
+
+            }
+        } catch (java.io.FileNotFoundException e) {
+            Log.e(TAG, "Can't find file", e);
+        } catch (java.io.IOException e) {
+            Log.e(TAG, "Read error (I/O)", e);
+        } catch (Exception e) {
+            Log.e(TAG, "Parsing JSON error", e);
+        }
+    }
+
+    // Compromise between CPU usage and memory usage : keep cache raw data and combinate global and specific items at call
+    public static List<Item> getItemsForCategory(String categoryName) {
+
+        // Add global items
+        List<Item> combinedList = new ArrayList<>(cachedGlobals);
+
+        // Add specific items
+        for (Category cat : cachedCategories) {
+            if (cat.getName().equals(categoryName)) {
+                combinedList.addAll(cat.getItems());
+                break;
+            }
+        }
+        return combinedList;
+    }
+
+    public static List<Category> getCategories() {
+        return cachedCategories;
+    }
+
+    // Internal class for Gson
+    private static class CategoriesWrapper {
+        List<Item> globalItems;
+        List<Category> categories;
+    }
+}