Class: Yast::SequencerClass

Inherits:
Module
  • Object
show all
Defined in:
library/sequencer/src/modules/Sequencer.rb

Instance Method Summary collapse

Instance Method Details

#mainObject



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# File 'library/sequencer/src/modules/Sequencer.rb', line 41

def main
  textdomain "base"

  @docheck = true
end

#Run(aliases, sequence) ⇒ Object

The Wizard Sequencer

Parameters:

  • aliases (Hash)

    the map of aliases

  • sequence (Hash)

    the sequence of dialogs

Returns:

  • final symbol or nil, if error (see the y2log)



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# File 'library/sequencer/src/modules/Sequencer.rb', line 310

def Run(aliases, sequence)
  aliases = deep_copy(aliases)
  sequence = deep_copy(sequence)
  # Check aliases and sequence correctness
  if @docheck && WS_check(aliases, sequence) != true
    return Convert.to_symbol(WS_error("CHECK FAILED"))
  end

  stack = []
  # string|symbol current
  current = Ops.get(sequence, "ws_start")
  if current.nil?
    return Convert.to_symbol(WS_error("Starting dialog not found"))
  end

  loop do
    if Ops.is_symbol?(current)
      Builtins.y2debug("Finished")
      return Convert.to_symbol(current)
    end

    stack = WS_push(stack, current)
    Builtins.y2debug("stack=%1", stack)
    ret = WS_run(aliases, Convert.to_string(current))

    if ret.nil? || !Ops.is_symbol?(ret)
      return Convert.to_symbol(
        WS_error(Builtins.sformat("Invalid ret: %1", ret))
      )
    elsif ret == :back
      Builtins.y2debug("Back")
      poped = []
      special = true
      loop do
        return :back if Ops.less_than(Builtins.size(stack), 2)
        poped = WS_pop(stack)
        Builtins.y2debug("poped=%1", poped)
        current = Ops.get(poped, 1)
        stack = Ops.get_list(poped, 0)
        special = WS_special(aliases, Convert.to_string(current))
        Builtins.y2debug("special=%1", special)
        break if !special
      end
    else
      Builtins.y2debug("ret=%1", ret)
      current = WS_next(
        sequence,
        Convert.to_string(current),
        Convert.to_symbol(ret)
      )
      Builtins.y2debug("current=%1", current)
      if current.nil?
        return Convert.to_symbol(
          WS_error(Builtins.sformat("Next not found: %1", current))
        )
      end
    end
  end

  # Not reached
  nil
end

#WS_alias(aliases, alias_) ⇒ Yast::Term

Find an aliases in the aliases map

Parameters:

  • aliases (Hash)

    map of aliases

  • alias (String)

    given alias

Returns:

  • (Yast::Term)

    belonging to the given alias or nil, if error



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# File 'library/sequencer/src/modules/Sequencer.rb', line 189

def WS_alias(aliases, alias_)
  aliases = deep_copy(aliases)
  found = Ops.get(aliases, alias_)
  if found.nil?
    return WS_error(Builtins.sformat("Alias not found: %1", alias_))
  end
  if Ops.is_list?(found)
    if Ops.less_or_equal(Builtins.size(Convert.to_list(found)), 0)
      return WS_error(Builtins.sformat("Invalid alias: %1", found))
    end
    found = Ops.get(Convert.to_list(found), 0)
  end
  if found.nil?
    return WS_error(Builtins.sformat("Invalid alias: %1", found))
  end

  deep_copy(found)
end

#WS_check(aliases, sequence) ⇒ Object

Check correct types in maps and alias presence for sequence.

Parameters:

  • aliases (Hash)

    the map of aliases

  • sequence (Hash)

    the sequence of dialogs

Returns:

  • check passed?



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# File 'library/sequencer/src/modules/Sequencer.rb', line 60

def WS_check(aliases, sequence)
  aliases = deep_copy(aliases)
  sequence = deep_copy(sequence)
  ret = []

  # check if aliases is not a nil
  if aliases.nil?
    Builtins.y2error(2, "sequencer check: aliases is nil")
    return false
  end

  # check if sequence is not a nil
  if sequence.nil?
    Builtins.y2error(2, "sequencer check: sequence is nil")
    return false
  end

  # check if ws_start is in aliases
  if Ops.get(aliases, "ws_start")
    Builtins.y2error(2, "sequencer check: ws_start cannot be an alias name")
    ret = Builtins.add(ret, false)
  else
    ret = Builtins.add(ret, true)
  end

  # check aliases map types
  ret0 = Builtins.maplist(aliases) do |key, val|
    if !Ops.is_string?(key)
      Builtins.y2error(2, "sequencer check: not a string: %1", key)
      next false
    elsif Ops.is_list?(val)
      if Ops.less_than(Builtins.size(Convert.to_list(val)), 2)
        Builtins.y2error(
          2,
          "sequencer check: list size too small: %1 (key: %2)",
          Builtins.size(Convert.to_list(val)),
          key
        )
        next false
      # FIXME: use function pointers
      #             else if (!is(select((list) val, 0, nil), term)) {
      #                 y2error(2, "sequencer check: not a term: %1", select((list) val, 0, nil));
      #                 return false;
      #             }
      elsif !Ops.is_boolean?(Ops.get(Convert.to_list(val), 1))
        Builtins.y2error(
          2,
          "sequencer check: not a boolean: %1",
          Ops.get(Convert.to_list(val), 1)
        )
        next false
      else
        next true
      end
    else
      # FIXME: use function pointers
      #         else if (!is(val, term)) {
      #             y2error(2, "sequencer check: not a term: %1", val);
      #             return false;
      #         }
      next true
    end
  end
  ret = Builtins.flatten([ret, ret0])

  # check if ws_start is in sequence
  if Ops.get(sequence, "ws_start").nil?
    Builtins.y2error(2, "sequencer check: ws_start needs to be defined")
    ret = Builtins.add(ret, false)
  else
    ret = Builtins.add(ret, true)
  end

  # check all aliases in sequence
  ret0 = Builtins.maplist(sequence) do |key, val|
    if key == "ws_start"
      next true if Ops.is_symbol?(val) || !Ops.get(aliases, val).nil?

      Builtins.y2error(2, "sequencer check: alias not found: %1", val)
      false
    elsif Ops.get(aliases, key).nil?
      Builtins.y2error(2, "sequencer check: alias not found: %1", key)
      false
    elsif !Ops.is_map?(val)
      Builtins.y2error(2, "sequencer check: not a map: %1 %2", key, val)
      false
    else
      ret1 = Builtins.maplist(Convert.to_map(val)) do |k, v|
        if !Ops.is_symbol?(k)
          Builtins.y2error(2, "sequencer check: not a symbol: %1", k)
          false
        elsif !Ops.is_symbol?(v) && Ops.get(aliases, v).nil?
          Builtins.y2error(2, "sequencer check: alias not found: %1", v)
          false
        else
          true
        end
      end
      ret1.all?
    end
  end
  ret = Builtins.flatten([ret, ret0])

  # check that all aliases are used
  ret0 = Builtins.maplist(aliases) do |key, _val|
    if !Builtins.haskey(sequence, key)
      Builtins.y2warning(2, "sequencer check: alias not used: %1", key)
      # return false;
    end
    true
  end
  ret = Builtins.flatten([ret, ret0])

  ret.all? { |v| v }
end

#WS_error(error) ⇒ Object

Report error and return nil

Parameters:

  • error (String)

    the error message text

Returns:

  • always nil

See Also:

  • #6474


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# File 'library/sequencer/src/modules/Sequencer.rb', line 180

def WS_error(error)
  Builtins.y2error(1, "sequencer: %1", error)
  nil
end

#WS_next(sequence, current, ret) ⇒ Object

Find a next item in the sequence

Parameters:

  • sequence (Hash)

    sequence of dialogs

  • current (String)

    current dialog

  • ret (Symbol)

    returned value (determines the next dialog)

Returns:

  • next dialog (symbol), WS action (string) or nil, if error (current or next not found)



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# File 'library/sequencer/src/modules/Sequencer.rb', line 234

def WS_next(sequence, current, ret)
  sequence = deep_copy(sequence)
  found = Ops.get_map(sequence, current)
  if found.nil?
    return WS_error(Builtins.sformat("Current not found: %1", current))
  end
  # string|symbol next
  next_ = Ops.get(found, ret)
  if next_.nil?
    return WS_error(Builtins.sformat("Symbol not found: %1", ret))
  end
  deep_copy(next_)
end

#WS_pop(stack) ⇒ new stack, poped value

Pop one item from the stack (remove an item and return the stack top item)

Parameters:

  • stack (Array)

    stack of previously run dialogsk

Returns:

  • (new stack, poped value)

    or nil if the stack is empty or nil



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# File 'library/sequencer/src/modules/Sequencer.rb', line 296

def WS_pop(stack)
  stack = deep_copy(stack)
  return nil if stack.nil?
  num = Builtins.size(stack)
  return nil if Ops.less_than(num, 2)
  newstack = Builtins.remove(stack, Ops.subtract(num, 1))
  poped = Ops.get(stack, Ops.subtract(num, 2))
  [newstack, poped]
end

#WS_push(stack, item) ⇒ Object

Push one item to the stack

Parameters:

  • stack (Array)

    stack of previously run dialogs

  • item (Object)

    item to be pushed

Returns:

  • the new stack or nil, if the stack is nil



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# File 'library/sequencer/src/modules/Sequencer.rb', line 276

def WS_push(stack, item)
  stack = deep_copy(stack)
  item = deep_copy(item)
  return nil if stack.nil?

  return Builtins.add(stack, item) if !Builtins.contains(stack, item)

  found = false
  newstack = Builtins.filter(stack) do |v|
    next false if found
    found = true if v == item
    true
  end

  deep_copy(newstack)
end

#WS_run(aliases, id) ⇒ Object

Run a function from the aliases map

Parameters:

  • aliases (Hash)

    map of aliases

  • id (String)

    function to run

Returns:

  • returned value from function or nil, if function is nil or returned something else than symbol



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# File 'library/sequencer/src/modules/Sequencer.rb', line 252

def WS_run(aliases, id)
  aliases = deep_copy(aliases)
  Builtins.y2debug("Running: %1", id)

  function = WS_alias(aliases, id)
  if function.nil?
    return Convert.to_symbol(WS_error(Builtins.sformat("Bad id: %1", id)))
  end

  ret = Builtins.eval(function)

  if !Ops.is_symbol?(ret)
    return Convert.to_symbol(
      WS_error(Builtins.sformat("Returned value not symbol: %1", ret))
    )
  end

  Convert.to_symbol(ret)
end

#WS_special(aliases, alias_) ⇒ Object

Decide if an alias is special

Parameters:

  • aliases (Hash)

    map of aliases

  • alias (String)

    given alias

Returns:

  • true if the given alias is special or nil, if not found



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# File 'library/sequencer/src/modules/Sequencer.rb', line 212

def WS_special(aliases, alias_)
  aliases = deep_copy(aliases)
  found = Ops.get(aliases, alias_)
  if found.nil?
    return Convert.to_boolean(
      WS_error(Builtins.sformat("Alias not found: %1", alias_))
    )
  end
  ret = false
  if Ops.is_list?(found)
    if Ops.greater_than(Builtins.size(Convert.to_list(found)), 1)
      ret = Ops.get_boolean(Convert.to_list(found), 1)
    end
  end
  ret
end

#WS_testall(aliases) ⇒ Object

Test (run) all dialogs in the aliases map

Parameters:

  • aliases (Hash)

    the map of aliases

Returns:

  • returned values of tested dialogs

See Also:

  • documentation for the format of aliases map


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# File 'library/sequencer/src/modules/Sequencer.rb', line 51

def WS_testall(aliases)
  aliases = deep_copy(aliases)
  Builtins.maplist(aliases) { |_id, func| Builtins.eval(func) }
end