first commit

plugins/postgresql/util.js

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+var config = require('../../core/util.js').getConfig();
+
+var watch = config.watch;
+if(watch) {
+  var settings = {
+    exchange: watch.exchange,
+    pair: [watch.currency, watch.asset]
+  }
+}
+
+/**
+ * Returns true if we use single database where
+ * all our tables are stored. The default is to store
+ * every exchange into it's own db.
+ *
+ * Set config.postgresql.database to use single db setup
+ */
+function useSingleDatabase() {
+    return !!config.postgresql.database;
+}
+
+/**
+ * Postgres has tables in lowercase if you don't
+ * escape their names. Which we don't and so let's
+ * just lowercase them.
+ */
+function useLowerCaseTableNames() {
+  return !config.postgresql.noLowerCaseTableName;
+}
+
+module.exports = {
+  settings: settings,
+
+  // true if we have single db setup (see postrgesql.database config key)
+  useSingleDatabase: useSingleDatabase,
+
+  // returns DB name (depends on single db setup)
+  database: function () {
+    return useSingleDatabase() ?
+      config.postgresql.database :
+      config.watch.exchange.toLowerCase().replace(/\-/g,'');
+  },
+
+  // returns table name which can be different if we use
+  // single or multiple db setup.
+  table: function (name) {
+    if (useSingleDatabase()) {
+      name = watch.exchange.replace(/\-/g,'') + '_' + name;
+    }
+    var fullName = [name, settings.pair.join('_')].join('_');
+    return useLowerCaseTableNames() ? fullName.toLowerCase() : fullName;
+  },
+
+  startconstraint: function (name) {
+    if (useSingleDatabase()) {
+      name = watch.exchange.replace(/\-/g,'') + '_' + name;
+    }
+    var fullName = [name, settings.pair.join('_')].join('_');
+    return useLowerCaseTableNames() ? fullName.toLowerCase() + '_start_key' : fullName + '_start_key';
+  },
+
+  // postgres schema name. defaults to 'public'
+  schema: function () {
+    return config.postgresql.schema ? config.postgresql.schema : 'public';
+  }
+}