public_library_map/website/load-map.js

// add tile layer from OSM
var baseMap =  L.tileLayer('https://api.mapbox.com/styles/v1/{id}/tiles/{z}/{x}/{y}?access_token={accessToken}', {
  attribution: 'Map data &copy; <a href="https://www.openstreetmap.org/">OpenStreetMap</a> contributors, <a href="https://creativecommons.org/licenses/by-sa/2.0/">CC-BY-SA</a>, Imagery © <a href="https://www.mapbox.com/">Mapbox</a>',
  maxZoom: 18,
    id: 'mapbox/dark-v10',
    tileSize: 512,
    zoomOffset: -1,
    accessToken: 'pk.eyJ1IjoiaHVnaHIiLCJhIjoiY2lxenRqMGQyMDJvdWZwbWd0d2JxeGswNiJ9.vfUQRJDzbJhaG_865TSkPA'
});

var baseRules = L.tileLayer('https://api.mapbox.com/styles/v1/{id}/tiles/{z}/{x}/{y}?access_token={accessToken}', {
    attribution: 'Map data &copy; <a href="https://www.openstreetmap.org/">OpenStreetMap</a> contributors, <a href="https://creativecommons.org/licenses/by-sa/2.0/">CC-BY-SA</a>, Imagery © <a href="https://www.mapbox.com/">Mapbox</a><br>Incorporates Administrative Boundaries ©PSMA Australia Limited licensed by the Commonwealth of Australia under Creative Commons Attribution 4.0 International licence (CC BY 4.0).',
    maxZoom: 18,
    id: 'mapbox/light-v10',
    tileSize: 512,
    zoomOffset: -1,
    accessToken: 'pk.eyJ1IjoiaHVnaHIiLCJhIjoiY2lxenRqMGQyMDJvdWZwbWd0d2JxeGswNiJ9.vfUQRJDzbJhaG_865TSkPA'
      });

// attach map to #mapid div above and centre
var map = L.map('mapid', {
    center: [-27.00, 133.000],
    zoom: 5,
    layers: [baseMap]
  });

// Use TopoJSON
// -----------------------------------------------------------------
L.TopoJSON = L.GeoJSON.extend({
  addData: function (jsonData) {
    if (jsonData.type === 'Topology') {
      for (let key in jsonData.objects) {
        geojson = topojson.feature(jsonData, jsonData.objects[key]);
        L.GeoJSON.prototype.addData.call(this, geojson);
      }
    } else {
      L.GeoJSON.prototype.addData.call(this, jsonData);
    }
  },
});
// // Copyright (c) 2013 Ryan Clark (MIT)

// -----------------------------------------------------------------

// library services fines overlay
var fines = new L.TopoJSON(libraryServices, {
style: function(feature){
    return {
      fillColor: getFinesColor(feature.properties.fines),
      weight: 3,
      color: "white",
      dashArray: "4",
      fillOpacity: 0.4
    }
  },
onEachFeature: function onEachFeature(feature, layer) {
  layer.on({
    mouseover: e => highlightFeature(e),
    mouseout: e => resetHighlight(e, fines),
    click: zoomToFeature
    })
  }
});

// fill patterns for loan period overlay

var circles = new L.PatternCircle({
  color: '#000',
  weight: 1,
  radius: 2,
  x: 4,
  y: 4,
  fill: true,
  fillOpacity: 1
});

var loanTwo = new L.Pattern({
  width: 8,
  height: 8
})

loanTwo.addShape(circles);
loanTwo.addTo(map);

var loanThree = new L.StripePattern({
color: '#000'
}); 
loanThree.addTo(map);

var loanFour = new L.StripePattern({
color: '#000',
weight: 6,
spaceWeight: 2,
angle: 45
}); 
loanFour.addTo(map);

var loanSix = new L.StripePattern({
  color: '#000',
  weight: 2,
  spaceWeight: 6,
  angle: 135
  }); 
  loanSix.addTo(map);

function getLoanFillPattern(w) {
return  w == '2' ? loanTwo :
        w == '3' ? loanThree :
        w == '4' ? loanFour :
        w == '6' ? loanSix : null
}

// loan period overlay
var loanPeriod = new L.TopoJSON(libraryServices, {
style: function(feature){
    return {
      weight: 3,
      color: "#fff",
      dashArray: "4",
      fillOpacity: 0.6,
      fillColor: "#bbb",
      fillPattern: getLoanFillPattern(feature.properties.standard_loan_weeks)
    }
  },

onEachFeature: function onEachFeature(feature, layer) {
  layer.on({
    mouseover: e => highlightFeature(e),
    mouseout: e => resetHighlight(e, loanPeriod),
    click: zoomToFeature
    })
  }
});

// TODO:
const branches = L.layerGroup([
  L.geoCsv(branchesCsv, {
    firstLineTitles: true, 
    fieldSeparator: ',',
    onEachFeature: function (feature, layer) {
    layer.bindPopup("<strong>" + feature.properties.town + "</strong><br/>" + feature.properties.address)
    },
    pointToLayer: function (feature, latlng) {
      return L.circle(latlng, {color: "#FF3961", radius: 800}) // this is an 800m radius around the library
      }
    }),
  L.geoCsv(branchesCsv, {
    firstLineTitles: true, 
    fieldSeparator: ',',
    pointToLayer: function (feature, latlng) {
      return L.circleMarker(latlng, {color: "#FF3961", radius: 2, fill: true})
      }
    })
]).addTo(map) // add this to the initial map on load

// Indigenous Knowledge Centre locations from csv file
var ikcs = L.layerGroup([
  L.geoCsv(ikcCsv, {
  firstLineTitles: true, 
  fieldSeparator: ',',
  onEachFeature: function (feature, layer) {
  layer.bindPopup("<strong>" + feature.properties.town + "</strong><br/>" + feature.properties.address)
  },
  pointToLayer: function (feature, latlng) {
    return L.circle(latlng, {color: "#76DBA7", radius: 800})
    }
  }),
  L.geoCsv(ikcCsv, {
    firstLineTitles: true, 
    fieldSeparator: ',',
    pointToLayer: function (feature, latlng) {
      return L.circleMarker(latlng, {color: "#76DBA7", radius: 2, fill: true})
    }
  })
]).addTo(map) // add this to the initial map on load

// mechanics institutes (Vic) & schools of arts (NSW) locations from csv file
var mechsAndSoA = L.layerGroup([
  L.geoCsv(mechanics, {
    firstLineTitles: true, 
    fieldSeparator: ',',
    onEachFeature: function (feature, layer) {
    layer.bindPopup("<strong>" + feature.properties.town + "</strong><br/>" + feature.properties.address)
    },
    pointToLayer: function (feature, latlng) {
      return L.circle(latlng, {color: "rgb(255,165,0)", radius: 800})
    }
    }),
  L.geoCsv(mechanics, {
    firstLineTitles: true, 
    fieldSeparator: ',',
    pointToLayer: function (feature, latlng) {
      return L.circleMarker(latlng, {color: "rgb(255,165,0)", radius: 2, fill: true})
    }
  })
]).addTo(map) // add this to the initial map on load

// NSLA locations from csv file
var otherLibs = L.layerGroup([
  L.geoCsv(nslaBranches, {
    firstLineTitles: true, 
    fieldSeparator: ',',
    onEachFeature: function (feature, layer) {
    layer.bindPopup("<strong>" + feature.properties.town + "</strong><br/>" + feature.properties.address)
    },
    pointToLayer: function (feature, latlng) {
      return L.circle(latlng, {color: "#75f857", radius: 800})
      }
    }),
  L.geoCsv(nslaBranches, {
    firstLineTitles: true, 
    fieldSeparator: ',',
    pointToLayer: function (feature, latlng) {
      return L.circleMarker(latlng, {color: "#75f857", radius: 2, fill: true})
    }
  })
]).addTo(map) // add this to the initial map on load

// ++++++++++++++
// control layers
// ++++++++++++++
var baseMaps = {
"Libraries" : baseMap,
// "Languages" : baseLang,
"Rules" : baseRules,
}

// change the overlay name depending on the mode.
var modeButton = document.getElementById('mode-button');

var overlayMaps = {
  "Settler Knowledge Centres" : branches,
  "Indigenous Knowledge Centres": ikcs,
  "Worker Pacification Centres" : mechsAndSoA,
  "Imperial Knowledge Centres": otherLibs
  }

function setGeneral() {
  overlayMaps = {
  "Settler Knowledge Centres" : branches,
  "Indigenous Knowledge Centres": ikcs,
  "Worker Pacification Centres" : mechsAndSoA,
  "Imperial Knowledge Centres": otherLibs
  }
  modeButton.innerText = "View in White Fragility mode";
}

function setFragile() {
  overlayMaps = {
    "Public Libraries" : branches,
    "Indigenous Knowledge Centres": ikcs,
    "Mechanics Institutes" : mechsAndSoA,
    "National & State Libraries" : otherLibs
    };
    modeButton.innerText = "View in General mode";
}

if (sessionStorage.getItem('mapMode') === 'fragile') {
  setFragile()
} else {
  setGeneral()
}

// switching mode between standard and fragile
function switchMode() {
  if (sessionStorage.getItem('mapMode') === 'fragile') {
    sessionStorage.setItem('mapMode', 'general');
    setGeneral()
    mapControl.remove();
    infoBoxes.branches.remove()
    mapControl = L.control.layers(baseMaps, overlayMaps, {"collapsed": false}).addTo(map);
    infoBoxes.branches.addTo(map)
  } else {
    sessionStorage.setItem('mapMode', 'fragile');
    setFragile()
    mapControl.remove();
    infoBoxes.branches.remove()
    mapControl = L.control.layers(baseMaps, overlayMaps, {"collapsed": false}).addTo(map);
    infoBoxes.branches.addTo(map)
  }
}

modeButton.addEventListener('click', switchMode, false);

// add control layers
var mapControl = L.control.layers(
    baseMaps, 
    overlayMaps, 
    { "collapsed" : false }
  ).addTo(map);

// scale
L.control.scale().addTo(map);

// info boxes
var infoBoxes = {
  branches: L.control(),
  fines: L.control(),
  loanPeriod: L.control(),
  serviceInfo: L.control({position: 'topleft'})
}

function getFinesColor(f) {
return  f == 'no' ? '#4dac26' :
        f == 'yes' ? '#d01c8b' :
        f == 'adults' ? '#f1b6da' :
        f == 'by_lga' ? '#abd9e9' :
        f == 'no_unconfirmed' ? '#b8e186' : '#bbb';
}

// highlight feature on mouse hover
function highlightFeature(e) {
  var layer = e.target;
  layer.setStyle({
    weight: 6,
    color: '#FF3961',
    dashArray: "0",
    fillOpacity: 0
  });

  if (!L.Browser.ie && !L.Browser.opera && !L.Browser.edge) {
    layer.bringToFront();
  }
  infoBoxes.serviceInfo.addTo(map)
  infoBoxes.serviceInfo.update(layer.feature.properties);
}

// clear on mouseout
function zoomToFeature(e) {
  map.fitBounds(e.target.getBounds());
}

function resetHighlight(e, layer) {
  layer.resetStyle(e.target);
  infoBoxes.serviceInfo.remove()
}

// this is used to add general info when each layer is added
function addLegend() {
  this._div = L.DomUtil.create('div', 'info')
  this.update();
  return this._div;
  }

// FINES LEGEND
infoBoxes.fines.onAdd = addLegend;
infoBoxes.fines.update = function (props) {
this._div.innerHTML =  
  `<p>Hover over an area for more information</p>
  <section>
    <div><div class="circle" style="background-color: #4dac26"></div>Fine free</div>
    <div><div class="circle" style="background-color: #b8e186"></div>Fine free (unconfirmed)</div>
    <div><div class="circle" style="background-color: #f1b6da"></div>Fine free for children</div>
    <div><div class="circle" style="background-color: #abd9e9"></div>Fine policy varies</div>
    <div><div class="circle" style="background-color: #d01c8b"></div>Fines for all users</div>
    <div><div class="circle" style="background-color: #bbb"></div>Unknown (help me find out!)</div>
  </section>
  `
};

// BRANCH LOCATIONS LEGEND
infoBoxes.branches.onAdd = addLegend;
infoBoxes.branches.update = function (props) {
this._div.innerHTML = `
<h4>Library Branches</h4>
<p>Circles represent an 800 metre radius from the library location. This is the distance generally used by urban planners to represent "conceptually within walking distance" for most people.</p>
`};
infoBoxes.branches.addTo(map) // add by default

// STANDARD LOAN PERIOD LEGEND
infoBoxes.loanPeriod.onAdd = addLegend;
infoBoxes.loanPeriod.update = function (props) {
this._div.innerHTML = `
<section>
<div><div class="circle" style="background: 
radial-gradient(4px 4px at 6px 6px, #3a3a3a 50%, transparent 75%),
radial-gradient(4px 4px at 16px 6px, #3a3a3a 50%, transparent 75%),
radial-gradient(4px 4px at 2px 12px, #3a3a3a 50%, transparent 75%),
radial-gradient(4px 4px at 12px 12px, #3a3a3a 50%, transparent 75%),
radial-gradient(4px 4px at 20px 12px, #3a3a3a 50%, transparent 75%),
radial-gradient(4px 4px at 8px 18px, #3a3a3a 50%, transparent 75%);
background-repeat: no-repeat;
border: 1px solid black;
"></div>2 weeks</div>
  <div><div class="circle" style="background: repeating-linear-gradient(
    0deg,
    #3a3a3a,
    #3a3a3a 2px,
    #fff 2px,
    #3a3a3a 4px
    )"></div>3 weeks</div>
  <div><div class="circle" style="background: repeating-linear-gradient(
    45deg,
    #3a3a3a,
    #3a3a3a 3px,
    #fff 1px,
    #3a3a3a 4px
    )"></div>4 weeks</div>
    <div><div class="circle" style="background: repeating-linear-gradient(
      135deg,
      #fff,
      #fff 8px,
      #3a3a3a 2px,
      #fff 10px
      )"></div>6 weeks</div>
  <div><div class="circle" style="background-color: #bbb"></div>Unknown (help me find out!)</div>
</section>
`
};

// FOCUSSED AREA INFOBOX
infoBoxes.serviceInfo.onAdd = addLegend;
infoBoxes.serviceInfo.update = function(props) {
  if (props) {
  this._div.innerHTML = `<h4>${props.name}</h4>` +
  '<section><p>' + 
  (
    props.fines === "no" ? "Fine free for overdue items" : 
    props.fines == "no_unconfirmed" ? "Probably no overdue fines" : 
    props.fines === "yes" ? "Overdue fines for all users" : 
    props.fines == "adults" ? "No overdue fines for children" :
    props.fines == "by_lga" ? "Fine policy varies" : "No fines data"
  ) + '</p><p>' +
  (
    !props.standard_loan_weeks || props.standard_loan_weeks == "?" ? `No loan period data` : `${props.standard_loan_weeks} week loans` +
  '</p></section>'
  )}
}

// remove info boxes & markers when relevant layer is removed
map.on('overlayremove', l => {
  if (l.name == "Fines") {
    infoBoxes.fines.remove()
  } 
  if (l.name == "Loan Period") {
    infoBoxes.loanPeriod.remove()
  } 
})

// add info boxes & markers when relevant layer is added
map.on('overlayadd', l => {
  if (l.name == "Fines") {
    infoBoxes.fines.addTo(map)
  } 
  if (l.name == "Loan Period") {
    infoBoxes.loanPeriod.addTo(map)
    loanPeriod.bringToBack()
  }
})

// change overlays depending on base layer
// we remove info boxes before adding them again where relevant
// this is so we don't accidentally stack up multiple copies dependng on user
// navigation journey
map.on('baselayerchange', l => {
  for (let k in infoBoxes) {
      infoBoxes[k].remove()
    }
  if (l.name == "Rules") {
    mapControl.addOverlay(fines, "Fines")
    mapControl.addOverlay(loanPeriod, "Loan Period")
    loanPeriod.addTo(map)
    fines.addTo(map)
    for (let i in overlayMaps ) {
      mapControl.removeLayer(overlayMaps[i])
      overlayMaps[i].remove()
    }
    modeButton.setAttribute('class', 'hidden'); // hide the mode button when it's not relevant
  } else {
    mapControl.removeLayer(fines)
    mapControl.removeLayer(loanPeriod)
    fines.remove()
    loanPeriod.remove()
    branches.addTo(map)
    for (let k in overlayMaps ) {
      mapControl.addOverlay(overlayMaps[k], k)
    }
    infoBoxes.branches.addTo(map);
    modeButton.setAttribute('class', 'visible');
  }
})