Module: Simpleflow

Defined in:
lib/simpleflow.rb,
lib/simpleflow/yql.rb,
lib/simpleflow/http.rb,
lib/simpleflow/json.rb,
lib/simpleflow/ping.rb,
lib/simpleflow/liquid.rb,
lib/simpleflow/jsonpath.rb,
lib/simpleflow/urlencode.rb,
lib/simpleflow/dns_resolve.rb,
lib/simpleflow/object_builder.rb,
lib/simpleflow/string_builder.rb

Defined Under Namespace

Modules: Modules

Constant Summary collapse

VERSION = 
'0.0.1'

Class Method Summary collapse

Class Method Details

.run(config, params = {}, debug = false, find_method = nil) ⇒ Object 



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# File 'lib/simpleflow.rb', line 33

def self.run(config, params = {}, debug = false, find_method = nil)
	
   wires = config["wires"] || []
   modules = config["modules"] || []
       
	# Store the results of each sub-module
   execValues = {} 

	# list all of the modules that we can execute
   moduleIdsToExecute = [] 

	# List all already executed modules
   executedModules = []


   firstTimeInLoop = true
   moreModulesToRun = false
   while moreModulesToRun or firstTimeInLoop do
       firstTimeInLoop = false
     
       # Recalculate all modules that can be executed :
       mId = 0
       modules.each { |m2|
         if !moduleIdsToExecute.include?(mId) and !executedModules.include?(mId) # don't re-execute modules
           mayEval = true
           # runnable if all wires which target is this mId have a source output evaluated.
           wires.each { |w|
             if w["tgt"]["moduleId"] == mId
               if !execValues[ w["src"]["moduleId"] ]
                 mayEval = false
               end
             end
           }            
           moduleIdsToExecute << mId if mayEval
         end  
         mId += 1
       }
     
       if moduleIdsToExecute.size == 0
         moreModulesToRun = false
       else
         moreModulesToRun = true
         
           moduleId = moduleIdsToExecute.shift
           m = modules[moduleId]
       
           # Build the parameters for the execution
           p = {}
           # params passed to the run method
           params.each { |k,v| p[k] = v }

           # default form values
           m["value"].each { |k,v| p[k] = v }

					
					puts "Wires: "+wires.inspect

           # incoming wire params
           wires.each { |w|
             if w["tgt"]["moduleId"] == moduleId

							puts "Incoming wire: "+w.inspect

							key =  w["tgt"]["terminal"]
							val = execValues[ w["src"]["moduleId"] ][ w["src"]["terminal"] ]

							# We simply want to do p[key] = val,
							# except that key might look like   "myvar[1][firstname]"
							# which mean we have to store this val in p["myvar"][1]["firstname"] instead
							push_to = p					
							pathItems = key.scan(/\[([^\]]*)\]/).map { |i| i[0].match(/\d+/) ? i[0].to_i : i[0] }
							if pathItems.size > 0
								push_to = push_to[key.match(/^([^\[]*)/)[0]]
							end
							if pathItems.size > 1
								0.upto(pathItems.size-2) { |i| push_to = push_to[  pathItems[i]  ] }
							end
							if pathItems.size > 0
								key = pathItems.last
							end
               push_to[key] = val

             end
           }


           puts "\n Starting "+m["name"]+" MODULE with : "+p.inspect
       
           # Execute Ruby base modules
           if !Modules.methods.index( m["name"] ).nil?
						begin
             	execValues[moduleId] = Modules.send( m["name"].to_sym, p)
						rescue Exception => e
							puts "Simpleflow "+e.message
						end

           else
             # Try to execute composed module
						if find_method
							w = find_method.call(m["name"])
							if !w
								raise "Module "+m["name"]+" not found !"
							end
              execValues[moduleId] = Simpleflow.run(w, p, false, find_method)
						else
							raise "Module "+m["name"]+" not found !"
						end
														
           end
       
					puts "\n Finished "+m["name"]+" MODULE with : "+execValues[moduleId].inspect
           

           # Mark this modules as executed
           executedModules.push(moduleId)
     
       end
       
   end  
   
   # Return internal execution values if debug mode
   return execValues if debug

   
   # OUTPUTS 
  outputValues = {}
   moduleIndex = 0
  modules.each { |m|
    if m["name"] == "output"
      wires.each { |w|
        if w["tgt"]["moduleId"] == moduleIndex and execValues[w["src"]["moduleId"]]
          outputValues[m["value"]["name"]] = execValues[w["src"]["moduleId"]][ w["src"]["terminal"] ]
         end
       }
     end
     moduleIndex += 1
   }
   return outputValues
	
end