Class: Marty::DeloreanRule

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

Defined Under Namespace

Classes: ComputeError

Class Method Summary collapse

Instance Method Summary collapse

Methods inherited from BaseRule

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

Methods inherited from Base

get_final_attrs, get_struct_attrs, make_hash, make_openstruct, mcfly_pt

Methods inherited from ActiveRecord::Base

joins, old_joins

Class Method Details

.base_compute2(ruleh, metadata_opts, params, dgparams = params) ⇒ Object 



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# File 'app/models/marty/delorean_rule.rb', line 76

def self.base_compute2(ruleh, metadata_opts, params, dgparams = params)
    id, name, eclassname, computed_guards, grids, results, fixed_results =
      ruleh.values_at('id', 'name', 'engine', 'computed_guards', 'grids',
                      'results', 'fixed_results')
    raise "Error in rule '#{id}:#{name}': bad metadata_opts" if !metadata_opts

    eclass = eclassname && eclassname.constantize || Marty::RuleScriptSet
    engine = eclass.new(params['pt']).get_engine(ruleh) if
      computed_guards.present? || results.present?

    result = OpenStruct.new(cg_keys: compg_keys(computed_guards))

    if computed_guards.present?
      begin
        result.cg_vals = engine.evaluate(eclass.node_name, result.cg_keys,
                                         params.clone)
      rescue StandardError => e
        result.err_message = e.message
        result.err_stack   = e.backtrace
        result.err_section = 'computed_guards'
        raise ComputeError.new(
          "Error (guard) in rule '#{id}:#{name}': #{result.err_message}",
          result.err_stack,
          params.clone,
          result.err_section)
      end
      result.cg_hash = Hash[result.cg_keys.zip(result.cg_vals)]
      fails = result.cg_hash.select { |_k, v| ![v].flatten.first }
      return fails if fails.present?
    end

    grids_computed = false
    result.gr_keys = grid_keys(grids, eclass)
    result.res_keys = comp_res_keys(results, grids, eclass, metadata_opts)
    if (result.res_keys - result.gr_keys - fixed_results.keys).present?
      begin
        result.res_vals = engine.evaluate(
          eclass.node_name,
          result.res_keys,
          params + {
            'dgparams__' => dgparams,
          })
        grids_computed = true
      rescue StandardError => e
        result.err_message = e.message
        result.err_stack   = e.backtrace
        result.err_section = 'results'
        raise ComputeError.new(
          "Error (results) in rule '#{id}:#{name}': #{result.err_message}",
          result.err_stack,
          params + {
            'dgparams__' => dgparams,
          },
          result.err_section)
      end
      result.res_hash = Hash[result.res_keys.zip(result.res_vals)]
    else
      result.res_hash = fixed_results.slice(*result.res_keys)
    end

    if grids.present? && !grids_computed
      pt = params['pt']
      gres = {}
      result.gr_hash = 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.res_hash || {}) + (result.gr_hash || {})
ensure
    if ruleh['fixed_results']['log__']
      resh = result.to_h
      [:res_keys, :res_vals].each { |k| resh.delete(k) } if
        result.res_hash.present? || result.res_keys.blank?
      [:cg_keys, :cg_vals].each { |k| resh.delete(k) } if
        result.cg_hash.present? ||  result.cg_keys.blank?
      resh.delete(:gr_keys) if result.gr_hash.present? || result.gr_keys.blank?
      estack_full = resh.delete(:err_stack)
      estack = estack_full && {
        err_stack: estack_full.select { |l| l.starts_with?('DELOREAN') } } || {}
      detail = { input: params, dgparams: dgparams } + resh + estack
      Marty::Logger.info("Rule Log #{ruleh['name']}",
                         Marty::Util.scrub_obj(detail))
    end
end

.comp_res_keys(results, grids, ecl, pcfg) ⇒ Object 



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# File 'app/models/marty/delorean_rule.rb', line 54

def self.comp_res_keys(results, grids, ecl, pcfg)
  # FIXME in May 2019: remove this check (use as passed)
  defkeys = pcfg.is_a?(Hash) ? pcfg.keys : pcfg
  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 50

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 25

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 201

def self.get_grid_rename_handler(klass)
  proc do |old, new|
    klass.where(obsoleted_dt: 'infinity').find_each do |r|
      r.grids.each { |k, v| r.grids[k] = new if v == old }
      r.results.each do |k, _v|
        r.results[k] = %Q("#{new}") if
                       k.ends_with?('_grid') && r.fixed_results[k] == old
      end
      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 192

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 61

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

.inherited(child_class) ⇒ Object 



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# File 'app/models/marty/delorean_rule.rb', line 214

def self.inherited(child_class)
  super
  Marty::DataGrid.register_rule_handler(get_grid_rename_handler(child_class))
end

.results_cfg_var ⇒ Object 



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# File 'app/models/marty/delorean_rule.rb', line 46

def self.results_cfg_var
  'NOT DEFINED'
end

Instance Method Details

#base_compute2(metadata_opts, params, dgparams = params) ⇒ Object 



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# File 'app/models/marty/delorean_rule.rb', line 188

def base_compute2(metadata_opts, params, dgparams = params)
  self.class.base_compute2(self_as_hash, metadata_opts, params, dgparams)
end

#self_as_hash ⇒ Object 



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

def self_as_hash
  attributes + { '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 StandardError => e
      errors[:computed] << '- ' + e.message
    end
  end
end