enhance analyze, save output to space

[burritojustice]

here xyz analyze iterates through a space and shows the frequency of values for a particular property:

$ here xyz analyze J7LtWd5Z
Operation may take a while. Please wait.........................................
? Select the properties to analyze 15 : qCaretaker : Private , Private , Private
qCaretaker
┌────────────────────────────────────────┬────────────────────────────────────────┬────────────────────────────────────────┐
│ PropertyName                           │ Value                                  │ Count                                  │
├────────────────────────────────────────┼────────────────────────────────────────┼────────────────────────────────────────┤
│ qCaretaker                             │ Private                                │ 159141                                 │
│ qCaretaker                             │ DPW                                    │ 25888                                  │
│ qCaretaker                             │ SFUSD                                  │ 1078                                   │
│ qCaretaker                             │ Port                                   │ 723                                    │
│ qCaretaker                             │ Rec/Park                               │ 720                                    │
│ qCaretaker                             │ PUC                                    │ 261                                    │
│ qCaretaker                             │ DPW for City Agency                    │ 186                                    │
│ qCaretaker                             │ MTA                                    │ 106                                    │
│ qCaretaker                             │ Purchasing Dept                        │ 85                                     │
│ qCaretaker                             │ Dept of Real Estate                    │ 85                                     │
│ qCaretaker                             │ Housing Authority                      │ 73                                     │
│ qCaretaker                             │ Fire Dept                              │ 69                                     │
│ qCaretaker                             │ Health Dept                            │ 54                                     │
│ qCaretaker                             │ Police Dept                            │ 50                                     │
│ qCaretaker                             │ Mayor Office of Housing                │ 36                                     │
│ qCaretaker                             │ Public Library                         │ 34                                     │
│ qCaretaker                             │ Arts Commission                        │ 31                                     │
│ qCaretaker                             │ Office of Mayor                        │ 26                                     │
│ qCaretaker                             │ War Memorial                           │ 20                                     │
│ qCaretaker                             │ City College                           │ 11                                     │
│ qCaretaker                             │ Asian Arts Commission                  │ 6                                      │
└────────────────────────────────────────┴────────────────────────────────────────┴────────────────────────────────────────┘

Total unique property values in space J7LtWd5Z : 

┌────────────────────────────────────────┬────────────────────────────────────────┐
│ PropertyName                           │ Count                                  │
├────────────────────────────────────────┼────────────────────────────────────────┤
│ qCaretaker                             │ 21                                     │
└────────────────────────────────────────┴────────────────────────────────────────┘

• We should save this as an object within the client object of the space info, so it can be used for dataviz purposes.

• if a field is quantitative, we should calculate global min, max, average, mean

• We should run this on all properties.

• analyze iterates through the entire space -- we should leverage the statistics endpoint so we know what properties are in the space, and create an object in client:

{
	properties:
	{
		qCaretaker:
		{	
			kind: qualitative,
			unique: 21,
			values:
			{
				Private: 
				{
					count: 159141,
					rank: 1
				},
				DPW: 
				{
					count: 25888,
					rank: 2
				},
				SFUSD:
				{ 
					count: 1078,
					rank: 3
				},
				...
				Asian Art Museum:
				{
					count: 6
					rank: 21
				}
			}
			
		},
		height:
		{
			kind: quantitative,
			max: 250,
			min: 6,
			avg: 14.7,
			mean: 30
		}
	},
	updatedAt: 12098457192
}

Applications could use rank to choose non-repetitive colors for qualitative values, and meaningful color ranges for quantitative values.

This should eventually become part of the statistics response.

[burritojustice]

Could we make analyze part of upload? It could track and count unique values, and then write them to the space description when it's finished.