3 files changed, 220 insertions, 0 deletions
diff --git a/app/tasks/minetestcheck/__init__.py b/app/tasks/minetestcheck/__init__.py
new file mode 100644
index 0000000..dbc57ad
--- /dev/null
+++ b/app/tasks/minetestcheck/__init__.py
@@ -0,0 +1,48 @@
+from enum import Enum
+
+class MinetestCheckError(Exception):
+	def __init__(self, value):
+		self.value = value
+	def __str__(self):
+		return repr("Error validating package: " + self.value)
+
+class ContentType(Enum):
+	UNKNOWN = "unknown"
+	MOD = "mod"
+	MODPACK = "modpack"
+	GAME = "game"
+	TXP = "texture pack"
+
+	def isModLike(self):
+		return self == ContentType.MOD or self == ContentType.MODPACK
+
+	def validate_same(self, other):
+		"""
+		Whether or not `other` is an acceptable type for this
+		"""
+		assert(other)
+
+		if self == ContentType.MOD:
+			if not other.isModLike():
+				raise MinetestCheckError("expected a mod or modpack, found " + other.value)
+
+		elif self == ContentType.TXP:
+			if other != ContentType.UNKNOWN and other != ContentType.TXP:
+				raise MinetestCheckError("expected a " + self.value + ", found a " + other.value)
+
+		elif other != self:
+			raise MinetestCheckError("expected a " + self.value + ", found a " + other.value)
+
+
+from .tree import PackageTreeNode, get_base_dir
+
+def build_tree(path, expected_type=None, author=None, repo=None, name=None):
+	path = get_base_dir(path)
+
+	root = PackageTreeNode(path, "/", author=author, repo=repo, name=name)
+	assert(root)
+
+	if expected_type:
+		expected_type.validate_same(root.type)
+
+	return root
diff --git a/app/tasks/minetestcheck/config.py b/app/tasks/minetestcheck/config.py
new file mode 100644
index 0000000..a8187d2
--- /dev/null
+++ b/app/tasks/minetestcheck/config.py
@@ -0,0 +1,10 @@
+def parse_conf(string):
+	retval = {}
+	for line in string.split("\n"):
+		idx = line.find("=")
+		if idx > 0:
+			key   = line[:idx].strip()
+			value = line[idx+1:].strip()
+			retval[key] = value
+
+	return retval
diff --git a/app/tasks/minetestcheck/tree.py b/app/tasks/minetestcheck/tree.py
new file mode 100644
index 0000000..38c2880
--- /dev/null
+++ b/app/tasks/minetestcheck/tree.py
@@ -0,0 +1,162 @@
+import os
+from . import MinetestCheckError, ContentType
+from .config import parse_conf
+
+def get_base_dir(path):
+	if not os.path.isdir(path):
+		raise IOError("Expected dir")
+
+	root, subdirs, files = next(os.walk(path))
+	if len(subdirs) == 1 and len(files) == 0:
+		return get_base_dir(path + "/" + subdirs[0])
+	else:
+		return path
+
+
+def detect_type(path):
+	if os.path.isfile(path + "/game.conf"):
+		return ContentType.GAME
+	elif os.path.isfile(path + "/init.lua"):
+		return ContentType.MOD
+	elif os.path.isfile(path + "/modpack.txt") or \
+			os.path.isfile(path + "/modpack.conf"):
+		return ContentType.MODPACK
+	elif os.path.isdir(path + "/mods"):
+		return ContentType.GAME
+	elif os.path.isfile(path + "/texture_pack.conf"):
+		return ContentType.TXP
+	else:
+		return ContentType.UNKNOWN
+
+
+class PackageTreeNode:
+	def __init__(self, baseDir, relative, author=None, repo=None, name=None):
+		print(baseDir)
+		self.baseDir  = baseDir
+		self.relative = relative
+		self.author   = author
+		self.name	 = name
+		self.repo	 = repo
+		self.meta	 = None
+		self.children = []
+
+		# Detect type
+		self.type = detect_type(baseDir)
+		self.read_meta()
+
+		if self.type == ContentType.GAME:
+			if not os.path.isdir(baseDir + "/mods"):
+				raise MinetestCheckError(("game at {} does not have a mods/ folder").format(self.relative))
+			self.add_children_from_mod_dir(baseDir + "/mods")
+		elif self.type == ContentType.MODPACK:
+			self.add_children_from_mod_dir(baseDir)
+
+
+	def read_meta(self):
+		result = {}
+
+		# .conf file
+		try:
+			with open(self.baseDir + "/mod.conf", "r") as myfile:
+				conf = parse_conf(myfile.read())
+				for key in ["name", "description", "title", "depends", "optional_depends"]:
+					try:
+						result[key] = conf[key]
+					except KeyError:
+						pass
+		except IOError:
+			pass
+
+		# description.txt
+		if not "description" in result:
+			try:
+				with open(self.baseDir + "/description.txt", "r") as myfile:
+					result["description"] = myfile.read()
+			except IOError:
+				pass
+
+		# depends.txt
+		import re
+		pattern = re.compile("^([a-z0-9_]+)\??$")
+		if not "depends" in result and not "optional_depends" in result:
+			try:
+				with open(self.baseDir + "/depends.txt", "r") as myfile:
+					contents = myfile.read()
+					soft = []
+					hard = []
+					for line in contents.split("\n"):
+						line = line.strip()
+						if pattern.match(line):
+							if line[len(line) - 1] == "?":
+								soft.append( line[:-1])
+							else:
+								hard.append(line)
+
+					result["depends"] = hard
+					result["optional_depends"] = soft
+
+			except IOError:
+				pass
+
+		else:
+			if "depends" in result:
+				result["depends"] = [x.strip() for x in result["depends"].split(",")]
+			if "optional_depends" in result:
+				result["optional_depends"] = [x.strip() for x in result["optional_depends"].split(",")]
+
+
+		# Calculate Title
+		if "name" in result and not "title" in result:
+			result["title"] = result["name"].replace("_", " ").title()
+
+		# Calculate short description
+		if "description" in result:
+			desc = result["description"]
+			idx = desc.find(".") + 1
+			cutIdx = min(len(desc), 200 if idx < 5 else idx)
+			result["short_description"] = desc[:cutIdx]
+
+		if "name" in result:
+			self.name = result["name"]
+			del result["name"]
+
+		self.meta = result
+
+	def add_children_from_mod_dir(self, dir):
+		for entry in next(os.walk(dir))[1]:
+			path = os.path.join(dir, entry)
+			if not entry.startswith('.') and os.path.isdir(path):
+				child = PackageTreeNode(path, self.relative + entry + "/", name=entry)
+				if not child.type.isModLike():
+					raise MinetestCheckError(("Expecting mod or modpack, found {} at {} inside {}") \
+							.format(child.type.value, child.relative, self.type.value))
+
+				self.children.append(child)
+
+
+	def fold(self, attr, key=None, acc=None):
+		if acc is None:
+			acc = set()
+
+		if self.meta is None:
+			return acc
+
+		at = getattr(self, attr)
+		value = at if key is None else at.get(key)
+
+		if isinstance(value, list):
+			acc |= set(value)
+		elif value is not None:
+			acc.add(value)
+
+		for child in self.children:
+			child.fold(attr, key, acc)
+
+		return acc
+
+	def get(self, key):
+		return self.meta.get(key)
+
+	def validate(self):
+		for child in self.children:
+			child.validate()