first version of margin calculator

manufacturing.py

@@ -0,0 +1,122 @@
+#!/usr/bin/env python
+
+import oursql
+import urllib2
+from xml.dom import minidom
+
+system_name = 'amarr'
+#system_name = 'jita'
+conn = oursql.connect(db='eve', user='root')
+
+def get_systemid(name):
+	curs = conn.cursor()
+	try:
+		#SELECT regionID FROM mapRegions WHERE regionName
+		curs.execute('''
+			SELECT solarSystemID
+			FROM mapSolarSystems
+			WHERE solarSystemName LIKE ?;
+		''', (name,))
+		return curs.fetchone()[0]
+	finally:
+		curs.close()
+
+def iter_blueprints():
+	curs = conn.cursor()
+	try:
+		curs.execute('''
+			SELECT b.productTypeID, t.typeName FROM invBlueprintTypes as b
+			INNER JOIN invTypes AS t ON b.productTypeID = t.typeID
+		''')
+		while True:
+			r = curs.fetchone()
+			if r is None:
+				break
+			yield r
+	finally:
+		curs.close()
+
+def get_mats(typeid):
+	curs = conn.cursor()
+	try:
+		# base mats
+		curs.execute('''
+			SELECT t.typeID, m.quantity
+			FROM invTypeMaterials AS m
+			INNER JOIN invTypes AS t ON m.materialTypeID = t.typeID
+			WHERE m.typeID = ?;
+		''', (typeid,))
+		mats = dict(curs.fetchall())
+		# extra mats
+		curs.execute('''
+			SELECT blueprintTypeID FROM invBlueprintTypes
+			WHERE productTypeID = ?
+		''', (typeid,))
+		blueprint_typeid = curs.fetchall()[0][0]
+		curs.execute('''
+			SELECT t.typeID, r.quantity
+			FROM ramTypeRequirements AS r
+			INNER JOIN invTypes AS t ON r.requiredTypeID = t.typeID
+			INNER JOIN invGroups AS g ON t.groupID = g.groupID
+			WHERE r.typeID = ? AND r.activityID = 1 AND g.categoryID != 16;
+		''', (blueprint_typeid,))
+		while True:
+			r = curs.fetchone()
+			if r is None:
+				break
+			mat_typeid, quantity = r
+			if mat_typeid not in minerals.keys():
+				return None
+			try:
+				mats[mat_typeid] += quantity
+			except KeyError:
+				mats[mat_typeid] = quantity
+		return mats
+	finally:
+		curs.close()
+
+def get_prices(typeid, systemid):
+	# &regionlimit=%d
+	url = 'http://api.eve-central.com/api/marketstat?typeid=%d&usesystem=%d' % (typeid, systemid)
+	xml = minidom.parse(urllib2.urlopen(url))
+	buy = xml.getElementsByTagName('buy')[0]
+	buy_max = buy.getElementsByTagName('max')[0]
+	buy_price = float(buy_max.childNodes[0].data)
+	sell = xml.getElementsByTagName('sell')[0]
+	sell_min = sell.getElementsByTagName('min')[0]
+	sell_price = float(sell_min.childNodes[0].data)
+	return buy_price, sell_price
+
+def calc_margin(typeid, systemid):
+	mats = get_mats(typeid)
+	cost = 0
+	for mtypeid, quantity in mats.iteritems():
+		try:
+			cost += prices[mtypeid][1] * quantity
+		except KeyError:
+			return
+	if cost == 0:
+		return
+	sell_value = get_prices(typeid, systemid)[0]
+	profit = sell_value - cost
+	margin = profit / cost
+	return margin
+
+minerals = {
+		34: 'Tritanium',
+		35: 'Pyerite',
+		36: 'Mexallon',
+		40: 'Megacyte',
+		37: 'Isogen',
+		38: 'Nocxium',
+		39: 'Zydrine',
+	}
+prices = {}
+
+systemid = get_systemid(system_name)
+for typeid in minerals.iterkeys():
+	prices[typeid] = get_prices(typeid, systemid)
+for typeid, name in iter_blueprints():
+	margin = calc_margin(typeid, systemid)
+	if margin is not None:
+		print '%0.2f\t%s' % (margin, name)