refactor.nlogo

; Developed by Dr Peter Barbrook-Johnson and Antonio Tenorio-Fornés 2015 2016 as part of the P2Pvalue EU project

; Comments welcome - emails: p.barbrook-johnson@surrey.ac.uk, antoniotenorio@ucm.es

extensions [network nw]
globals [

  initial-products

  community-prod-activity-ls            ; list of the history of community production activity

  community-con-activity-ls             ; list of the history of community consumption activity

]

breed [commoners commoner]
breed [products product]
breed [projects project]
breed [t4sks t4sk]

turtles-own [
  repulsion
  age
]

undirected-link-breed [projecttasklinks projecttasklink]
directed-link-breed [commonertasklinks commonertasklink]
undirected-link-breed [commonerprojectlinks commonerprojectlink]
undirected-link-breed [friendlinks friendlink]
;; commoner to product link
directed-link-breed [consumerlinks consumerlink]
undirected-link-breed [projectproductlinks projectproductlink]

links-own [

  total-weight

  recent-weight
  max-recent-weight
  forget-recent-weight-prob ;; TODO call it forgetfulness?
  forget-link-prob

  in-attraction
  out-attraction

  link-age
]

;; Link method to increase current weight
to increase-weight

  set total-weight total-weight + 1
  set recent-weight min (list max-recent-weight (recent-weight + 1 ))

end

;; Link method to decrease current weight
to decrease-weight

  set recent-weight max (list 0 (recent-weight - 1 ))

end

commoners-own [
  time
  skills
  interest
]

projects-own [
  interest
]

t4sks-own [
  skill
  time-required
]

products-own [
  interest
]

friendlinks-own [
  times-worked-together
]

to setup
  clear-all
  reset-ticks

   ;; colour lines to mark projects and products spaces
   ask patches with [pxcor = 0] [set pcolor white]

   create-existing-products
   create-existing-projects
   create-existing-commoners

end


to create-existing-products

  if number-of-products = "one" [ set initial-products 1 ]
  if number-of-products = "few" [ set initial-products random 5 + 2 ]
  if number-of-products = "many" [ set initial-products random 100 ]

  create-products initial-products [
    set interest random num-interest-categories
    set xcor -25 + random 25
    set ycor -25 + interest

    create-product
]

end

to create-product
  ;; Style
  set size 2
  set color orange
  set shape "box"
  ;;

  set repulsion product-repulsion-prob

end

to create-existing-projects
  create-projects initial-projects [

    set interest random num-interest-categories

    set xcor -5
    set ycor -25 + interest

    create-project

    let my-product min-one-of products [ distance myself ]
    create-projectproductlink-with my-product [ set color red ]
  ]
end

to create-project

    ;; Style
    set size 2.5
    set color green - 2
    set shape "target"
    ;;

    set repulsion project-repulsion-prob

    let num-tasks random 10 + 2 ;; TODO take it to configuration and normal distribution for num-tasks
    set age 0

    hatch-t4sks num-tasks [
      create-task
    ]

end

to create-task

  ;; style
  set size 0.7
  set color green
  set shape "circle"
  ;;

  ;; position
  set ycor [ycor] of myself
  set heading random 360
  fd 1
  ;;

  ;; link
  create-projecttasklink-with myself [tie]

  t4sk-set-skill

  set age 0
  set time-required random-normal mean-time-required ( mean-time-required / 4 )

end

to t4sk-set-skill

  ; new tasks set their skill type
  ; if there are no other task in the project
  ; or with probability 50%
  ifelse (any? [ projecttasklink-neighbors ] of myself) or (random-float 1 < 0.5) [

    ; set a random skill
    set skill random (num-skills - 1)

  ] [

    ; else, set the task skill equal to one of its project tasks
    set skill [ skill ] of one-of [ projecttasklink-neighbors ] of myself

  ]
end

to create-existing-commoners

  ;; commoners hava a preferential attachement like structure
  nw:generate-preferential-attachment commoners friendlinks commoners-num [
    create-commoner
  ]

  ask commoners with [count my-friendlinks = 1] [
    ask one-of my-friendlinks [
      die
    ]
  ]

  ask friendlinks [
    set color yellow
  ]

end

to create-commonertasklink
  set color green
  set max-recent-weight 3
  set forget-recent-weight-prob 1 / 7 ;; TODO 7 as a param
  set forget-link-prob 1 / 30 ;; TODO 30 as a param
  set recent-weight 0
  set out-attraction commoner-task-attraction-prob
  set in-attraction task-commoner-attraction-prob
end

to create-consumerlink
  set color orange
  set max-recent-weight 3
  set forget-recent-weight-prob 1 / 7 ;; TODO 7 as a param
  set forget-link-prob 1 / 30 ;; TODO 30 as a param
  set in-attraction 0.02 ;; TODO as param
  set out-attraction commoner-product-attraction-prob
end

to create-commonerprojectlink
  set color green + 3
  set max-recent-weight 3
  set forget-recent-weight-prob 1 / 7 ;; TODO 7 as a param
  set forget-link-prob 1 / 30 ;; TODO 30 as a param
end

to create-friendlink
  set color yellow + 3
  set max-recent-weight 3
  set forget-recent-weight-prob 1 / 7 ;; TODO 7 as a param
  set forget-link-prob 1 / 30 ;; TODO 30 as a param
end

to create-commoner
  set interest random num-interest-categories
  set xcor random 25 + 1
  set ycor -25 + interest
  set size 1.5
  set color blue
  set repulsion commoner-repulsion-prob
  ;; commoners consume a community product
  create-consumerlink-to min-one-of products [ distance myself ] [create-consumerlink]

  ;; 3 random skills per commoner
  set skills (n-of 3 (n-values num-skills [?]))

  ;; An initial project per commoner
  let product-projects turtle-set [ projectproductlink-neighbors ] of out-consumerlink-neighbors
  if any? product-projects [
    create-commonerprojectlink-with one-of product-projects [create-commonerprojectlink]
  ]

  ;; Create links with tasks of my projects with my skills
  create-commonertasklinks-to
   (turtle-set [ projecttasklink-neighbors ] of commonerprojectlink-neighbors) with
      [ member? skill [ skills ] of myself ]
    [ create-commonertasklink ]

  ;; 90's do not contribute
  ask commoners with [count my-friendlinks = 0] [
    ask out-commonertasklink-neighbors [die]
  ]

end

to-report find-project-prob
  report  0.1 * 1 / distance myself ;; TODO use param instead of 0.1
end

to find-project
  ask one-of projects with [not member? self commonerprojectlink-neighbors] [
    if random-float 1 < find-project-prob [
      create-commonerprojectlink-with myself [create-commonerprojectlink]
    ]
  ]
end

;; skills and friends and previous contributions
to-report find-task-prob
  report 0.1 * 1 / distance myself
end


to find-task
  let task-of-my-projects
    turtle-set [ projecttasklink-neighbors ] of commonerprojectlink-neighbors

  if any? task-of-my-projects [
    ask one-of task-of-my-projects [
      if random-float 1 < find-task-prob [
        create-commonertasklink-from myself [ create-commonertasklink ]
      ]
    ]
  ]
end

to-report contrib-prob
    let num-tasks count out-commonertasklink-neighbors

  ifelse num-tasks = 0 [
    report 0
  ] [
    report 0.1 * (1 + sum [recent-weight] of my-out-consumerlinks) ;; TODO constants to params
  ]
end

to-report contrib-size
  report 1
end

;; TODO find project and tasks (and initialize with more commoner-task link neighbors)
;; TODO? contribute to those tasks that a commoner have already contributed to that task
to contribute
  if count out-commonertasklink-neighbors > 0 and random-float 1 < contrib-prob [
    ask one-of out-commonertasklink-neighbors [
      ask in-commonertasklink-from myself [
        increase-weight
      ]
      set time-required time-required - contrib-size
      if time-required < 0 [
        die
      ]
    ]
  ]
end

to-report find-product-prob
  report  0.1 * 1 / distance myself ;; TODO use param instead of 0.1
end

to find-product
  ask one-of products with [not member? self out-consumerlink-neighbors] [
    if random-float 1 < find-product-prob [
      create-consumerlink-from myself [create-consumerlink]
    ]
  ]
end

to-report consume-prob

  let num-prods count my-out-consumerlinks

  ifelse num-prods = 0 [
    report 0
  ] [
    report 0.1 * (1 + sum [recent-weight] of my-out-consumerlinks) ;; TODO constants to params
  ]
end

to consume
  if count out-consumerlink-neighbors > 0 and random-float 1 < consume-prob [
    ask one-of out-consumerlink-neighbors [
      ask in-consumerlink-from myself [
        increase-weight
      ]
    ]
  ]
end

to move-towards-edges [ agent ]
  ask agent [
    if xcor < 0 and xcor > -25 [
      ;; 'carefully' needed to prevent tied agents to move outside the model
      ;; for instance, tasks tied to projects
      carefully [ set xcor xcor - 1 ] []
    ]
    if xcor > 0 and xcor < 25 [
      carefully [ set xcor xcor + 1 ] []
    ]
  ]
end

to move-towards-center [ agent ]
  ask agent [
    if xcor < -1 [
      if not any? my-links with [tie-mode = "fixed" and [ xcor ] of other-end >= -1 ] [
        set xcor xcor + 1
      ]
    ]
    if xcor > 1 [
      if not any? my-links with [tie-mode = "fixed" and [ xcor ] of other-end <= 1 ] [
        set xcor xcor - 1
      ]
    ]
  ]
end

to go

  ask commoners [

    ;; contribution
    find-project
    find-task
    contribute

    ;; friendship
    ;; find-friends
    ;; drop-friends

    ;; consumption
    find-product
    consume

  ]

  ask links with [ recent-weight > 0 and random-float 1 < forget-recent-weight-prob ] [
    decrease-weight
  ]

  ask links with [ recent-weight = 0 and random-float 1 < forget-link-prob ] [
     die ;; TODO maybe record total history of this links that died not to lose important information
  ]

  ask products [
    let current-value sum [recent-weight] of my-in-consumerlinks

    set label current-value
  ]

  ;; Movements of agents toward center
  ;; For each link breed, weighted by number of links and their recent weights
  ask turtles [

    let linkbreeds (list)

    while [any? my-in-links with [ not member? breed linkbreeds ]] [
      ask one-of my-in-links with [ not member? breed linkbreeds ] [
        set linkbreeds lput breed linkbreeds
      ]

      let b last linkbreeds

      if any? my-in-links with [ breed = b and in-attraction > 0] [
        ask one-of my-in-links with [ breed = b and in-attraction > 0] [
          if random-float 1 < count [ my-in-links with [breed = b and recent-weight > 0] ] of myself * recent-weight * in-attraction [
            move-towards-center myself
          ]
        ]
      ]
    ]

    while [any? my-out-links with [ not member? breed linkbreeds ]] [
      ask one-of my-out-links with [ not member? breed linkbreeds ] [
        set linkbreeds lput breed linkbreeds
      ]

      let b last linkbreeds

      if any? my-out-links with [ breed = b and out-attraction > 0] [
        ask one-of my-out-links with [ breed = b and out-attraction > 0] [
          if random-float 1 < count [ my-out-links with [breed = b and recent-weight > 0] ] of myself * recent-weight * out-attraction [
            move-towards-center myself
          ]
        ]
      ]
    ]
  ]

  ;; Movement toward edges of the model.
  ;; Repulsion strength depends on distance to center.
  ask turtles with [random-float 1 < ((25 - abs xcor) / 2.5 * repulsion)] [
    move-towards-edges self
  ]

  tick

end
@#$#@#$#@
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PLOT
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@#$#@#$#@
## WHAT IS IT?

(a general understanding of what the model is trying to show or explain)

## HOW IT WORKS

(what rules the agents use to create the overall behavior of the model)

## HOW TO USE IT

(how to use the model, including a description of each of the items in the Interface tab)

## THINGS TO NOTICE

(suggested things for the user to notice while running the model)

## THINGS TO TRY

(suggested things for the user to try to do (move sliders, switches, etc.) with the model)

## EXTENDING THE MODEL

(suggested things to add or change in the Code tab to make the model more complicated, detailed, accurate, etc.)

## NETLOGO FEATURES

(interesting or unusual features of NetLogo that the model uses, particularly in the Code tab; or where workarounds were needed for missing features)

## RELATED MODELS

(models in the NetLogo Models Library and elsewhere which are of related interest)

## CREDITS AND REFERENCES

(a reference to the model's URL on the web if it has one, as well as any other necessary credits, citations, and links)
@#$#@#$#@
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