Add basic dependency resolution

app/models.py

@@ -398,7 +398,7 @@ class Package(db.Model):
 	forums       = db.Column(db.Integer,     nullable=True)
 
 	provides = db.relationship("MetaPackage", secondary=provides, lazy="subquery",
-			backref=db.backref("packages", lazy="dynamic"))
+			backref=db.backref("packages", lazy="dynamic", order_by=db.desc("score")))
 
 	dependencies = db.relationship("Dependency", backref="depender", lazy="dynamic", foreign_keys=[Dependency.depender_id])
 
@@ -441,6 +441,13 @@ class Package(db.Model):
 		else:
 			return "ready"
 
+	def getAsDictionaryKey(self):
+		return {
+			"name": self.name,
+			"author": self.author.display_name,
+			"type": self.type.toName(),
+		}
+
 	def getAsDictionaryShort(self, base_url, version=None, protonum=None):
 		tnurl = self.getThumbnailURL(1)
 		release = self.getDownloadRelease(version=version, protonum=protonum)

app/views/api.py

@@ -32,12 +32,42 @@ def api_packages_page():
 			for package in query.all()]
 	return jsonify(pkgs)
 
+
 @app.route("/api/packages/<author>/<name>/")
 @is_package_page
 def api_package_page(package):
 	return jsonify(package.getAsDictionary(app.config["BASE_URL"]))
 
 
+@app.route("/api/packages/<author>/<name>/dependencies/")
+@is_package_page
+def api_package_deps_page(package):
+	ret = []
+
+	for dep in package.dependencies:
+		name = None
+		fulfilled_by = None
+
+		if dep.package:
+			name = dep.package.name
+			fulfilled_by = [ dep.package.getAsDictionaryKey() ]
+
+		elif dep.meta_package:
+			name = dep.meta_package.name
+			fulfilled_by = [ pkg.getAsDictionaryKey() for pkg in dep.meta_package.packages]
+
+		else:
+			raise "Malformed dependency"
+
+		ret.append({
+			"name": name,
+			"is_optional": dep.optional,
+			"packages": fulfilled_by
+		})
+
+	return jsonify(ret)
+
+
 @app.route("/api/topics/")
 def api_topics_page():
 	qb     = QueryBuilder(request.args)

docker-compose.yml

@@ -33,5 +33,6 @@ services:
       - config.env
     volumes:
       - "./data/uploads:/home/cdb/app/public/uploads"
+      - "./app:/home/cdb/app"
     depends_on:
       - redis

requirements.txt

@@ -18,4 +18,4 @@ GitPython~=2.1
 lxml~=4.2
 pillow~=5.3
 pyScss~=1.3
-redis~=3.0
+redis==2.10.6