Cleanup AdventDay processing and README

README.md

@@ -5,65 +5,147 @@ This is a community driven Java template and utility API for the annual [Advent
 
 1. Clone this repository from GitHub as an IntelliJ repository (untested on other IDE's)
 2. Add the `AOC_SESSION_COOKIE` environment variable to your gradle run config and set it equal to that of your session cookie after logging in to your AoC account.
+   * Alternatively you can set a system environment variable and restart the IDE/terminal.
 3. Execute the gradle application -> run task.
 
-# Creating and running a solution #
+# Creating and Running Solutions #
 
+## Solution Packages
 Create a `package-info.java` in the package which contains your solutions for a given year.
-Make sure to annotate it with the `@AdventYear` annotation.
-Example:
+Make sure to annotate it with the `@AdventYear` annotation, so we can pull the correct inputs.
 
+**Example**:
 ```java
 @AdventYear(year=2024)
 package org.togetherjava.aoc.solutions;
+
 import org.togetherjava.aoc.core.annotations.AdventYear;
 ```
 
-Create an implementation of the `PuzzleSolution` interface and annotate it with the `@AdventDay` annotation
+The package my contain any files or subpackages you wish, but as described next, the solutions need a specific structure.
 
-```java
-import org.togetherjava.aoc.core.annotations.AdventDay;
-import org.togetherjava.aoc.core.puzzle.PuzzleInput;
-import org.togetherjava.aoc.core.puzzle.PuzzleSolution;
+---
+## Solution Classes
+Solution implementations must be under an `@AdventYear` package to be runnable.
+Additionally, they must implement the `PuzzleSolution` interface, which provides methods
+that give an input type directly.
+
+A useful shortcut for this is `CTRL + I` in IntelliJ, which implements missing methods.
+
+### Setting The Day
+
+While `@AdventYear` explicitly defines the year, a solution can implicitly or explicitly 
+define which day of the year.
+
+### Explicit Day Value
+To explicitly set which day your solution corresponds to, use the `@AdventDay` annotation to override and ignore auto-detection.
 
+**Example**:
+```java
 @AdventDay(day = 1)
+public class DayOne implements PuzzleSolution
+```
+
+### Implicit Day Auto-Detection
+If no `@AdventDay` annotation is provided, a default auto-detection is used instead.
+This will look for the *first* number in the class name in the range `[1, 31]`, ignoring leading zeros.
+Therefore, the following examples would be parsed as:
+
+| Class Name     | Implicit Day |
+|----------------|--------------|
+| `Day1`         | 1            |
+| `Day02`        | 2            |
+| `Day003`       | 3            |
+| `AocDay4`      | 4            |
+| `AocDay05`     | 5            |
+| `Aoc2024Day6`  | 6            |
+| `Aoc2024Day07` | 7            |
+| `Day8Attempt2` | 8            |
+
+---
+If neither implicit nor explicit days can be resolved, an error is thrown at runtime.
+
+### Puzzle Solution
+The methods defined by `PuzzleSolution` return `Object`, which is because not all
+AOC answers are `int` or `long`. You may still return an `int` or `long` type, and it will be autoboxed into an object.
+
+Here is an example implementation
+
+```java
 public class Day01 implements PuzzleSolution {
 
 	@Override
 	public Object part1(PuzzleInput input) {
-		return 0L;
+		return 123;
 	}
 
 	@Override
 	public Object part2(PuzzleInput input) {
-		return 0L;
+		return 456L;
 	}
 }
 ```
 
-Then you can run your solutions with the static `AocRunner` class.
+## Running Solutions
+The `AocRunner` class provides static access to run your solution implementations.
+
+There are 3 method names: `run`, `runPart1`, and `runPart2`, which each have the following overrides:
+
+| Parameters                               | Description                  |
+|------------------------------------------|------------------------------|
+| `()`                                     | Run today                    |
+| `(int year, int day)`                    | Run the given day            |
+| `(PuzzleDate date)`                      | Run the given date           |
+| `(Class<? extends PuzzleSolution> impl)` | Run the given implementation |
+
+
+Below are examples of different runner invocations:
 
 ```java
-AocRunner.run(); //this will detect and invoke the current day's problems
-AocRunner.run(2024, 1); //this will detect and invoke a day for a given year/day
-AocRunner.run(Day01.class); //Invoke a specific class
+AocRunner.run(); // Detect and run the current day's solution
+AocRunner.run(2024, 1); // Detect and run the AOC 2024 Day 1 solution
+AocRunner.run(Day01.class); // Run the solution implemented in Day01
+AocRunner.run(Day01BruteForce.class); // Run the solution implemented in Day01BruteForce
 ```
 
-# Getting your session cookie #
+### Multiple Solutions
+If more than one class implements a solution for a given date, all of those
+implementations are registered internally. When trying to run them without
+a specific class reference (`e.g. run(Day1BruteForce.class)`) then the specific
+implementation chosen is not well-defined, and is whichever is reflectively found first.
+
+# Input Caching
+Input files are fetched from the AOC web API to get your input data. To support AOC,
+we automatically cache the input responses on your local computer, preventing redundant API
+calls every time you run an implementation.
+
+## Local File Cache
+Cached input files are stored locally in a path relative to your OS platform. This is done
+with the `user.home` system property. Relative to that, `/.together-java/aoc/inputs/YYYY-DD-puzzle-input.txt`
+is where the file is stored.
+
+* Windows: `%userprofile%/.together-java/aoc/inputs/`
+
+# Session Cookie (`AOC_SESSION_COOKIE`)
+## Getting your session cookie
 
 In Chrome, or other Chromium browsers such as Opera, OperaGX etc
-1. Hit ctrl + shift + J to open up developer tools
+1. Hit `ctrl + shift + J` to open up developer tools
 2. Navigate to the application tab
 3. Click cookies
 4. Copy the session cookie
 
 ![](/setup/4.png)
 
-# Modifiying Gradle run configuration #
-1. Go to your Gradle tasks and go to application -> run and right click to modify the run configurations
-![](/setup/1.png)
-2. Click this box to add an environment variable
+## Modifiying Gradle run configuration / env
+1. Go to your Gradle tool window
+   * `Tasks`
+     * `application`
+       * Right-click `run` → `Modify Run Configuration...`  
+
+   ![](/setup/1.png)
+2. Click this box to add an environment variable  
 ![](/setup/2.png)
-3. Name the environment variable `AOC_SESSION_COOKIE` and then paste the value of your session cookie from your browser in to the value box.
+3. Name the environment variable `AOC_SESSION_COOKIE` and then paste the value of your session cookie from your browser in to the value box.  
 ![](/setup/3.png)
-4. Hit okay and then execute the Gradle run task
+4. Hit okay and then execute the Gradle `run` task

src/main/java/org/togetherjava/aoc/internal/SolutionRegistry.java

@@ -98,7 +98,7 @@ private static void init() {
                 if (solutionDay.isEmpty()) {
                     throw new RuntimeException("""
                             Unable to detect a valid day value from solution type '%s'. \
-                            Follow standard naming, or use @DayOverride() instead.\
+                            Follow standard naming, or use @AdventDay() instead.\
                             """.formatted(solution.getCanonicalName())
                     );
                 }
@@ -113,6 +113,7 @@ private static Optional<Integer> extractDay(String className) {
                 .results()
                 .map(MatchResult::group)
                 .map(StringUtils::trimLeadingZeros)
+                .filter(x -> 1 <= x && x <= 31)
                 .findFirst();
     }