From 1a7c164690107985059ac0576877bee9247ebeb9 Mon Sep 17 00:00:00 2001
From: cfunder <cfunder@users.osdn.me>
Date: Sun, 25 Sep 2022 20:40:21 -0400
Subject: [PATCH] Library

---
 .gitignore    | 16 +++++++++++
 docs/legal.md | 25 ----------------
 launcher.go   | 80 +++++++++++++++++++++++++++++++++++++++++++++++++++
 main.go       |  9 ------
 4 files changed, 96 insertions(+), 34 deletions(-)
 create mode 100644 .gitignore
 create mode 100644 launcher.go
 delete mode 100644 main.go

diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..656a0a4
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,16 @@
+# Binaries for programs and plugins
+*.exe
+*.exe~
+*.dll
+*.so
+*.dylib
+
+# Test binary, built with `go test -c`
+*.test
+
+# Output of the go coverage tool, specifically when used with LiteIDE
+*.out
+
+# Dependency directories (remove the comment below to include it)
+# vendor/
+
diff --git a/docs/legal.md b/docs/legal.md
index 85290eb..f2dc0eb 100644
--- a/docs/legal.md
+++ b/docs/legal.md
@@ -1,31 +1,6 @@
 # Legal
 When including `libmcpilauncher` in your project, you must include these license notices, additionally with the `libmcpilauncher` license notice at the root of the project:
 
-### subprocess license
-```
-MIT License
-
-Copyright (c) 2018 Christopher Simpkins
-
-Permission is hereby granted, free of charge, to any person obtaining a copy
-of this software and associated documentation files (the "Software"), to deal
-in the Software without restriction, including without limitation the rights
-to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
-copies of the Software, and to permit persons to whom the Software is
-furnished to do so, subject to the following conditions:
-
-The above copyright notice and this permission notice shall be included in all
-copies or substantial portions of the Software.
-
-THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
-FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
-AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
-LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
-OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
-SOFTWARE.
-```
-
 ### Golang Standart Library licenses
 ```
 The Go source code and supporting files in this directory
diff --git a/launcher.go b/launcher.go
new file mode 100644
index 0000000..ed22fa5
--- /dev/null
+++ b/launcher.go
@@ -0,0 +1,80 @@
+package launcher
+import (
+	"strings"
+	"fmt"
+	"os/exec"
+	"os"
+)
+
+// Fetch the options from an executable_path as a map.
+// executable_path must be a string with an executable
+// that provides --print-available-feature-flags and its
+// functionality.
+func GetOptionsMap(executable_path string) map[string]bool {
+
+	flags_unformatted, _ := exec.Command(executable_path, "--print-available-feature-flags").Output()
+	flags_newline_split := strings.Split(string(flags_unformatted), "\n")
+	//fmt.Println(flags_newline_split)
+	flags_formatted := map[string]bool{}
+	for i := 0; i <= len(flags_newline_split)-1; i++ {
+		flag := flags_newline_split[i]
+		if strings.HasPrefix(flag, "TRUE") {
+			flags_formatted[string((flag[5:]))] = true
+		} else if strings.HasPrefix(flag, "FALSE") {
+			flags_formatted[string(flag[6:])] = false
+	        }
+		//fmt.Println(flags_formatted) // Debug
+        }
+	//fmt.Println(flags_formatted)
+
+	return flags_formatted
+}
+
+// Same as GetOptionsMap but returns a slice of option
+// names instead of options and their values.
+func GetOptionsList (executable_path string) []string {
+	flags_map := GetOptionsMap(executable_path)
+	flags_slice := []string{}
+	for key, _ := range flags_map {
+		flags_slice = append(flags_slice, key)
+	}
+	return flags_slice
+}
+
+
+// Launch the game provided the executable path
+// Features must be a slice with strings of enabled features.
+func Launch (
+	executable_path string,
+	username string,
+        render_distance string,
+	debug bool,
+	features []string,
+	benchmark bool,
+        ) *exec.Cmd {
+
+	var executable_args []string // Arguments slice
+
+	// Set the arguments
+	if debug{
+		executable_args = append(executable_args, "--debug")
+	}
+	if benchmark {
+		executable_args = append(executable_args, "--benchmark")
+	}
+
+	cmd := exec.Command(executable_path, executable_args...) // Executable init
+
+	cmd.Env = os.Environ() // This is required, without this Reborn won't work.
+
+	features_string := strings.Join(features, "|") // Python equievelent of .join
+
+	cmd.Env = append(cmd.Env, // Append the enviroment variables
+	    "MCPI_USERNAME="+username,
+	    "MCPI_RENDER_DISTANCE="+render_distance,
+	    "MCPI_FEATURE_FLAGS="+features_string,
+        )
+
+	// Return the Cmd object to let the user do anything they want with it
+	return cmd
+}
diff --git a/main.go b/main.go
deleted file mode 100644
index c956c5c..0000000
--- a/main.go
+++ /dev/null
@@ -1,9 +0,0 @@
-package libmcpilauncher
-
-import (
-	subprocess "gopkg.in/go-rillas/subprocess.v1"
-)
-
-func GetOptionsMap(excutable_path string) map[string]bool {
-
-}