From b13c33d83ceef29361a584ae53fef57e86e3ad81 Mon Sep 17 00:00:00 2001
From: Eric Hulburd <eric@arbol.org>
Date: Fri, 12 Feb 2016 15:51:06 -0600
Subject: [PATCH] add d3 calendar grid

---
 client/d3/bar/base.js           |   2 +-
 client/d3/base.d3.js            |   1 -
 client/d3/base.js               |  47 ++++++++++++
 client/d3/composite.d3.js       |   1 -
 client/d3/grid.d3.js            |   0
 client/d3/grid/calendar_grid.js | 122 ++++++++++++++++++++++++++++++++
 client/d3/line.d3.js            |   1 -
 client/d3/line/line.js          |   8 ++-
 client/d3/line/spline.js        |   7 ++
 client/d3/pie.d3.js             |   1 -
 10 files changed, 184 insertions(+), 6 deletions(-)
 delete mode 100644 client/d3/base.d3.js
 create mode 100644 client/d3/base.js
 delete mode 100644 client/d3/composite.d3.js
 delete mode 100644 client/d3/grid.d3.js
 create mode 100644 client/d3/grid/calendar_grid.js
 delete mode 100644 client/d3/line.d3.js
 delete mode 100644 client/d3/pie.d3.js

diff --git a/client/d3/bar/base.js b/client/d3/bar/base.js
index 8e356ad..94ee48e 100644
--- a/client/d3/bar/base.js
+++ b/client/d3/bar/base.js
@@ -29,7 +29,7 @@ class BarChart {
 
   constructor(options){
     var bar_chart = this;
-    bar_chart =  extend(bar_chart, DEFAULTS, options);
+    bar_chart =  extend(bar_chart, DEFAULTS, bar_chart.chart_options, options);
 
     bar_chart.height = bar_chart.outer_height - bar_chart.margin.top - bar_chart.margin.bottom;
     bar_chart.width = bar_chart.outer_width - bar_chart.margin.left - bar_chart.margin.right;
diff --git a/client/d3/base.d3.js b/client/d3/base.d3.js
deleted file mode 100644
index 8adbe50..0000000
--- a/client/d3/base.d3.js
+++ /dev/null
@@ -1 +0,0 @@
-base.d3.js
diff --git a/client/d3/base.js b/client/d3/base.js
new file mode 100644
index 0000000..093e65e
--- /dev/null
+++ b/client/d3/base.js
@@ -0,0 +1,47 @@
+const DEFAULTS = {
+  outer_width: 500,
+  outer_height: 300,
+  margin: {top: 0, left: 70, bottom: 50, right: 20},
+  domain_ticks: 10,
+  range_ticks: 8,
+  container: "container",
+  time_series: false,
+  range_label: undefined,
+  domain_attr: undefined,
+  range_attr: undefined,
+  titleize: function(series, datum){
+    var s = datum ? datum.name : series.name,
+      words = s.split(' '),
+      array = [];
+    for (var i=0; i<words.length; ++i) {
+      array.push(words[i].charAt(0).toUpperCase() + words[i].toLowerCase().slice(1));
+    }
+    return array.join(' ');
+  },
+  toClass: function(series){
+    return series ? series.title.toLowerCase().replace(/\s+/g, '-') : "";
+  }
+};
+
+
+class Chart {
+
+  constructor(options){
+    var chart = this;
+    chart =  extend(chart, chart.constructor.DEFAULTS, options);
+
+    chart.height = chart.outer_height - chart.margin.top - chart.margin.bottom;
+    chart.width = chart.outer_width - chart.margin.left - chart.margin.right;
+
+    chart.svg = d3.select(chart.container).append("svg")
+        .attr("width", chart.outer_width)
+        .attr("height", chart.outer_height)
+      .append("g")
+        .attr("transform", "translate(" + chart.margin.left + "," + chart.margin.top + ")");
+    chart.defineAxes();
+    if (chart.afterAxes) chart.afterAxes();
+  }
+
+}
+
+export default Chart;
diff --git a/client/d3/composite.d3.js b/client/d3/composite.d3.js
deleted file mode 100644
index cd745ff..0000000
--- a/client/d3/composite.d3.js
+++ /dev/null
@@ -1 +0,0 @@
-composite.d3.js
diff --git a/client/d3/grid.d3.js b/client/d3/grid.d3.js
deleted file mode 100644
index e69de29..0000000
diff --git a/client/d3/grid/calendar_grid.js b/client/d3/grid/calendar_grid.js
new file mode 100644
index 0000000..d63d9c9
--- /dev/null
+++ b/client/d3/grid/calendar_grid.js
@@ -0,0 +1,122 @@
+import extend from 'extend';
+import Chart from './../base';
+
+// inspired by https://gist.github.com/mbostock/4b66c0d9be9a0d56484e
+class CalendarGridChart extends Chart{
+
+  get chart_options(){
+    return {
+      grid_padding: 1,
+      parse_date_format: '%Y-%m-%d',
+      display_date_format: '%B %Y',
+      date_attr: 'date',
+      range_attr: 'z',
+      extent: []
+    };
+  }
+
+  defineAxes(){
+    var grid_chart = this;
+    grid_chart.y_scale = d3.scale.ordinal()
+      .rangeRoundBands([grid_chart.height, 0], 0.05);
+
+    grid_chart.y_axis = d3.svg.axis()
+      .scale(grid_chart.y_scale)
+      .orient("left");
+
+    grid_chart.x_scale = d3.scale.ordinal()
+      .rangeRoundBands([0, grid_chart.width], 0.05);
+
+    grid_chart.x_axis = d3.svg.axis()
+      .scale(grid_chart.x_scale)
+      .orient("top");
+
+    // append axes
+    grid_chart.svg.append("g")
+        .attr("class", "d3-chart-domain d3-chart-axis");
+    grid_chart.svg.append("g")
+        .attr("class", "d3-chart-range d3-chart-axis")
+        .attr("transform", "translate(0, " + (grid_chart.height - grid_chart.margin.top) + ")");
+  }
+
+  afterAxes(){
+    var grid_chart = this;
+    grid_chart.day_length = grid_chart.width / 31 - grid_chart.grid_padding * 30;
+    if (grid_chart.parse_date_format) grid_chart.parseDate = d3.time.format(grid_chart.parse_date_format);
+    if (grid_chart.display_date_format) grid_chart.displayDate = d3.time.format(grid_chart.display_date_format);
+    grid_chart.monthFormat = d3.time.format('%B %Y');
+  }
+
+  serializeData(data){
+    var grid_chart = this,
+      serialized_data = {
+        series: data
+      };
+    serialized_data.css_class = data.css_class || bar_chart.toClass ? bar_chart.toClass(data_set) : "";
+    serialized_data.title = bar_chart.titleize ? bar_chart.titleize(data_set) : "";
+
+    toDate = grid_chart.parseDate ? (d)=>{ return grid_chart.parseDate(d[grid_chart.date_attr]); } : (d)=>{ return d[grid_chart.date_attr] };
+
+    var min_range = grid_chart.extent[0] || 0,
+      max_range = grid_chart.extent[1] || 0;
+    serialized_data.months = [];
+    series.values.forEach((value)=>{
+      var date = toDate(value),
+        date_s = grid_chart.monthFormat(value);
+
+      min_range = Math.min(0, min_range, value[grid_chart.range_attr]);
+      max_range = Math.max(max_range, value[grid_chart.range_attr]);
+      if (serialized_data.months.indexOf(date_s) < 0) serialized_data.months.push(date_s);
+    });
+    serialized_data.range ={
+      min: min_range,
+      max: max_range,
+      diff: max_range - min_range };
+
+    serialized_data.months = serialized_data.months.sort((date_s1, date_s2)=>{
+      var date1 = grid_chart.monthFormat(date_s1),
+        date2 = grid_chart.monthFormat(date_s2);
+      return date1.toTime() - date2.toTime();
+    });
+    return serialized_data;
+  };
+
+  drawData(data){
+    var grid_chart = this;
+    data = grid_chart.serializeData(data);
+
+    // calibrate axes
+    grid_chart.y_scale.domain(data.months);
+    grid_chart.svg.select(".d3-chart-range")
+      .call(grid_chart.y_axis);
+
+    grid_chart.x_scale.domain([1, 31]);
+    grid_chart.svg.select(".d3-chart-domain").call(grid_chart.x_axis);
+
+    var grid_units = grid_chart.svg.selectAll(".d3-chart-grid-unit" + series.css_class)
+        .data(data.series.values);
+    grid_chart.applyData(data.series, grid_units.enter().append("rect"));
+    grid_chart.applyData(data.series, grid_units.transition());
+    grid_units.exit().remove();
+  }
+
+  // helper method for drawData.
+  applyData(series, elements){
+    var grid_chart = this,
+        series_class = "d3-chart-grid-unit " + series.css_class;
+      elements
+          .attr("class", function(d){ return series_class + " " + d.css_class; })
+          .attr("y", function(d) { return grid_chart.y_scale(grid_chart.monthFormat(d[grid_chart.date_attr])); })
+          .attr("height", grid_chart.y_scale.rangeBand())
+          .attr("x", function(d) { return d[grid_chart.date_attr].getDate(); })
+          .attr("width", function(d) { return grid_chart.x_scale.rangeBand(); })
+          .attr("opacity", function(d) { return grid_chart.applyOpacity(d[grid_chart.range_attr], series.range);  })
+  }
+
+  applyOpacity(value, range){
+    return (value - range.max) / range.diff;
+  };
+
+}
+
+export default CalendarGridChart;
diff --git a/client/d3/line.d3.js b/client/d3/line.d3.js
deleted file mode 100644
index ec6493c..0000000
--- a/client/d3/line.d3.js
+++ /dev/null
@@ -1 +0,0 @@
-line.d3.js
diff --git a/client/d3/line/line.js b/client/d3/line/line.js
index 418a7d8..dc3f0d4 100644
--- a/client/d3/line/line.js
+++ b/client/d3/line/line.js
@@ -38,6 +38,12 @@ class LineChart {
     line_chart.init();
   }
 
+  get chart_options(){
+    return {
+      interpolation: 'basis'
+    };
+  }
+
   init(){
     var line_chart = this;
 
@@ -49,7 +55,7 @@ class LineChart {
 
     // function that draws the lines.
     line_chart.line = d3.svg.line()
-      .interpolate("basis")
+      .interpolate(line_chart.chart_options.interpolation)
       .x(function(d){ return x(d[line_chart.domain_attr]); })
       .y(function(d){ return y(d[line_chart.range_attr]); });
 
diff --git a/client/d3/line/spline.js b/client/d3/line/spline.js
index e6dd7cb..e4f6bab 100644
--- a/client/d3/line/spline.js
+++ b/client/d3/line/spline.js
@@ -1,6 +1,13 @@
 import LineChart from './line';
 
+const INTEPOLATION = 'cardinal';
+
 class SplineChart extends LineChart {
 
+  get chart_options(){
+    return {
+      interpolation: INTEPOLATION
+    }
+  }
 
 }
diff --git a/client/d3/pie.d3.js b/client/d3/pie.d3.js
deleted file mode 100644
index 23c32ce..0000000
--- a/client/d3/pie.d3.js
+++ /dev/null
@@ -1 +0,0 @@
-pie.d3.js