Create the server

[gdey]

Add a server component to the atlante command.

Implement the following URLs:
${sheet_name} = 50k | 5k

• 1. GET /sheets/${sheet_name}/mgdid/${mgdid-part}.pdf this will return the pdf. (Proxy) Should set all appropriate headers

• 2. GET /sheets/${sheet_name}/info/${lng}/${lat}

• 3. GET /sheets/${sheet_name}/info/mdgid/${mdgid-sheet_number}

these will return the following JSON:

{
  "mdgid" : string,
  "sheet_number" : null | number,
  "pdf_url":  null | url, // if null, pdf has not be generated
  "last_generated" :  null | date, // last time the pdf was generated
  "last_edited" : date,  // last time the data was edited
  "edited_by" : string, // the person who edited this last
  "series" : string,
  "geo_json" : geo_json // the geo_json of the bounding box.
  "lng" : null | float // the queried lng
  "lat" :  null | float // the queried lat
  "sheet_name": string
}

• 4. POST /sheets/${sheet_name}/mdgid will cause the pdf generation the job to start.

expected:

{
   "mdgid" : string,
   "sheet_number" : null | number,
}

returned:

{
   "mdgid" : string,
   "sheet_number" : null | number,
   "sheet_name" : string,
   "job_id" : number,
   "status" : "requested" | "started" | "processing" | "compleated",
}

• strike__[x] 5. GET /sheets/${sheet_name}/info/job_id/${job_id}__
• 5. GET /jobs/${job_id}/status

{
   "mdgid" : string,
   "sheet_number" : null | number,
   "sheet_name" : string,
   "job_id" : number,
   "status" : "requested" | "started" | "processing" | "completed",
   "status_description" : string,
}

• strike__[ ] 6. POST /sheets/${sheet_name}/notification used to notify the server that the pdf has been generated.__
• 6. POST /jobs/${job_id}/status

{
   "status" : "started" | "processing" | "completed",
   "status_description" : string,
}

• 7. GET /sheets/ used to get the currently configured sheets.

{
   "sheets" : []{
        "name": string,
        "scale" : number, // the scale in meters -- 5k => 5000; 50k => 50000
        "description":string,
    }
}

[ARolek]

@gdey while testing I noticed that pdf_url goes away if the PDF has not been created yet. It should be null rather than omit empty.

edit: found the issue: https://github.com/go-spatial/maptoolkit/blob/master/atlante/server/server.go#L195

[gdey]

Removed omit-empty, it will remain now.

[gdey]

Moved 1. to #47