Class: Marty::DeloreanRule

Inherits:
BaseRule show all
Defined in:
app/models/marty/delorean_rule.rb

Constant Summary

Constants inherited from Base

Base::COUNT_SIG, Base::DISTINCT_SIG, Base::FIRST_SIG, Base::GROUP_SIG, Base::JOINS_SIG, Base::LAST_SIG, Base::LIMIT_SIG, Base::MCFLY_PT_SIG, Base::NOT_SIG, Base::ORDER_SIG, Base::PLUCK_SIG, Base::SELECT_SIG, Base::WHERE_SIG

Class Method Summary collapse

Instance Method Summary collapse

Methods inherited from BaseRule

#check, #chkrange, get_subq, #gettypes, guard_info

Methods inherited from Base

mcfly_pt

Methods inherited from ActiveRecord::Base

joins, old_joins

Class Method Details

.base_compute(ruleh, params, dgparams = params) ⇒ Object 



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# File 'app/models/marty/delorean_rule.rb', line 59

def self.base_compute(ruleh, params, dgparams=params)
  id, name, engine, computed_guards, grids, results, fixed_results =
      ruleh.values_at("id", "name", "engine", "computed_guards", "grids",
                      "results", "fixed_results")
  eclass = engine && engine.constantize || Marty::RuleScriptSet
  engine = eclass.new(params["pt"]).get_engine(ruleh) if
    computed_guards.present? || results.present?

  if computed_guards.present?
    begin
      res = engine.evaluate(eclass.node_name,
                            compg_keys(computed_guards),
                            params.clone)
    rescue => e
      raise e, "Error (guard) in rule '#{id}:#{name}': #{e}", e.backtrace
    end
    return Hash[compg_keys(computed_guards).zip(res).select{|k,v| !v}] unless
      res.all?
  end
  grids_computed = false
  grid_results = {}
  crkeys = comp_res_keys(results, grids, eclass)
  if (results.keys - fixed_results.keys).present?
      begin
        eval_result = engine.evaluate(
          eclass.node_name,
          crkeys,
          params + {
            "dgparams__" => dgparams,
          })
        grids_computed = true
      rescue => e
        raise e, "Error (results) in rule '#{id}:#{name}': #{e}", e.backtrace
      end
      result = Hash[crkeys.zip(eval_result)]
  elsif fixed_results.keys.sort == results.keys.sort
    result = fixed_results
  end
  if grids.present? && !grids_computed
    pt = params['pt']
    gres = {}
    grid_results = grids.each_with_object({}) do |(gvar, gname), h|
      usename = eclass.grid_final_name(gvar)
      next h[usename] = gres[gname] if gres[gname]
      dg = Marty::DataGrid.lookup_h(pt,gname)
      dgr = dg && Marty::DataGrid.lookup_grid_distinct_entry_h(pt, dgparams,
                                                               dg)
      h[usename] = gres[gname] = dgr["result"] if dgr
    end
  end
  result + grid_results
end

.comp_res_keys(results, grids, ecl) ⇒ Object 



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# File 'app/models/marty/delorean_rule.rb', line 51

def self.comp_res_keys(results, grids, ecl)
  defkeys = (Marty::Config[results_cfg_var] || {}).keys
  results.keys.map {|k| k.ends_with?("_grid") ? ecl.grid_final_name(k) : k}.
     select{|k| defkeys.include?(k)} + grid_keys(grids, ecl)
end

.compg_keys(computed_guards) ⇒ Object 



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# File 'app/models/marty/delorean_rule.rb', line 47

def self.compg_keys(computed_guards)
  computed_guards.keys
end

.find_fixed(results) ⇒ Object 



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# File 'app/models/marty/delorean_rule.rb', line 24

def self.find_fixed(results)
  results.each_with_object({}) do |(k, v), h|
    v_wo_comment = /\A([^#]+)/.match(v)[1] if v.include?("#")
    # if v contains a #, try cut it there and attempt parse that way first
    jp = (v_wo_comment && JSON.parse("[#{v_wo_comment}]") rescue nil) ||
         (JSON.parse("[#{v}]") rescue nil)
    next h[k] = jp[0] if jp
    # json doesn't like single quotes, so handle those manually
    m = %r{\A'(.*)'\z}.match(v)
    next unless m
    h[k] = m[1]
  end
end

.get_grid_rename_handler(klass) ⇒ Object 



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# File 'app/models/marty/delorean_rule.rb', line 129

def self.get_grid_rename_handler(klass)
  Proc.new do |old, new|
    klass.where(obsoleted_dt: 'infinity').each do |r|
      r.grids.each { |k, v| r.grids[k] = new if v == old }
      r.results.each { |k, v| r.results[k] = %Q("#{new}") if
                       k.ends_with?("_grid") && r.fixed_results[k] == old }
      r.save! if r.changed?
    end
  end
end

.get_matches_(pt, attrs, params) ⇒ Object 



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# File 'app/models/marty/delorean_rule.rb', line 120

def self.get_matches_(pt, attrs, params)
  q = super(pt, attrs.except("rule_dt"), params)
  rule_dt = attrs["rule_dt"]
  q=q.where("start_dt <= ?", rule_dt).
     where("end_dt >= ? OR end_dt IS NULL", rule_dt) if rule_dt
  #puts q.to_sql
  q
end

.grid_keys(grids, eclass) ⇒ Object 



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# File 'app/models/marty/delorean_rule.rb', line 56

def self.grid_keys(grids, eclass)
    grids.keys.map{|k| eclass.grid_final_name(k) }
end

.init_dg_handler ⇒ Object 



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# File 'app/models/marty/delorean_rule.rb', line 140

def self.init_dg_handler
  Marty::DataGrid.register_rule_handler(get_grid_rename_handler(self))
end

.results_cfg_var ⇒ Object 



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# File 'app/models/marty/delorean_rule.rb', line 43

def self.results_cfg_var
  "NOT DEFINED"
end

Instance Method Details

#base_compute(params, dgparams = params) ⇒ Object 



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# File 'app/models/marty/delorean_rule.rb', line 116

def base_compute(params, dgparams=params)
  self.class.base_compute(self_as_hash, params, dgparams)
end

#self_as_hash ⇒ Object 



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# File 'app/models/marty/delorean_rule.rb', line 21

def self_as_hash
  self.as_json + {"classname"=>self.class.name}
end

#validate ⇒ Object 



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# File 'app/models/marty/delorean_rule.rb', line 6

def validate
  super
  return errors[:base] << "Start date must be before end date" if
    start_dt && end_dt && start_dt >= end_dt

  if computed_guards.present? || results.present?
    begin
      eclass = engine && engine.constantize || Marty::RuleScriptSet
      eng = eclass.new('infinity').get_engine(self_as_hash)
    rescue => e
      return errors[:computed] << "- " + e.message
    end
  end
end