X-Git-Url: https://git.openstreetmap.org/rails.git/blobdiff_plain/5bf4ce35c0a8c2f8fa468ab6271e7bd1d8cf97b3..dc2a95903722644f6109244cec9a2d1e195fef0e:/lib/osm.rb diff --git a/lib/osm.rb b/lib/osm.rb index aca4031eb..246fedf54 100644 --- a/lib/osm.rb +++ b/lib/osm.rb @@ -1,13 +1,6 @@ +# The OSM module provides support functions for OSM. module OSM - # This piece of magic reads a GPX with SAX and spits out - # lat/lng and stuff - # - # This would print every latitude value: - # - # gpx = OSM::GPXImporter.new('somefile.gpx') - # gpx.points {|p| puts p['latitude']} - require 'time' require 'rexml/parsers/sax2parser' require 'rexml/text' @@ -15,11 +8,112 @@ module OSM require 'digest/md5' require 'RMagick' + # The base class for API Errors. + class APIError < RuntimeError + def render_opts + { :text => "", :status => :internal_server_error } + end + end + + # Raised when an API object is not found. + class APINotFoundError < APIError + end + + # Raised when a precondition to an API action fails sanity check. + class APIPreconditionFailedError < APIError + def render_opts + { :text => "", :status => :precondition_failed } + end + end + + # Raised when to delete an already-deleted object. + class APIAlreadyDeletedError < APIError + def render_opts + { :text => "", :status => :gone } + end + end + + # Raised when the user logged in isn't the same as the changeset + class APIUserChangesetMismatchError < APIError + def render_opts + { :text => "The user doesn't own that changeset", :status => :conflict } + end + end + + # Raised when the changeset provided is already closed + class APIChangesetAlreadyClosedError < APIError + def render_opts + { :text => "The supplied changeset has already been closed", :status => :conflict } + end + end + + # Raised when a change is expecting a changeset, but the changeset doesn't exist + class APIChangesetMissingError < APIError + def render_opts + { :text => "You need to supply a changeset to be able to make a change", :status => :conflict } + end + end + + # Raised when a diff is uploaded containing many changeset IDs which don't match + # the changeset ID that the diff was uploaded to. + class APIChangesetMismatchError < APIError + def initialize(provided, allowed) + @provided, @allowed = provided, allowed + end + + def render_opts + { :text => "Changeset mismatch: Provided #{@provided} but only " + + "#{@allowed} is allowed.", :status => :conflict } + end + end + + # Raised when bad XML is encountered which stops things parsing as + # they should. + class APIBadXMLError < APIError + def initialize(model, xml) + @model, @xml = model, xml + end + + def render_opts + { :text => "Cannot parse valid #{@model} from xml string #{@xml}", + :status => :bad_request } + end + end + + # Raised when the provided version is not equal to the latest in the db. + class APIVersionMismatchError < APIError + def initialize(provided, latest) + @provided, @latest = provided, latest + end + + attr_reader :provided, :latest + + def render_opts + { :text => "Version mismatch: Provided " + provided.to_s + + ", server had: " + latest.to_s, :status => :conflict } + end + end + + # raised when a two tags have a duplicate key string in an element. + # this is now forbidden by the API. + class APIDuplicateTagsError < APIError + def initialize(type, id, tag_key) + @type, @id, @tag_key = type, id, tag_key + end + + attr_reader :type, :id, :tag_key + + def render_opts + { :text => "Element #{@type}/#{@id} has duplicate tags with key #{@tag_key}.", + :status => :bad_request } + end + end + + # Helper methods for going to/from mercator and lat/lng. class Mercator include Math #init me with your bounding box and the size of your image - def initialize(min_lat, min_lon, max_lat, max_lon, width, height) xsize = xsheet(max_lon) - xsheet(min_lon) ysize = ysheet(max_lat) - ysheet(min_lat) @@ -61,190 +155,6 @@ module OSM end end - - class GPXImporter - # FIXME swap REXML for libXML - attr_reader :possible_points - attr_reader :actual_points - attr_reader :tracksegs - - def initialize(filename) - @filename = filename - end - - def points - @possible_points = 0 - @actual_points = 0 - @tracksegs = 0 - - lat = -1 - lon = -1 - ele = -1 - date = DateTime.now(); - gotlatlon = false - gotele = false - gotdate = false - - parser = REXML::Parsers::SAX2Parser.new(File.new(@filename)) - - parser.listen( :start_element, %w{ trkpt }) do |uri,localname,qname,attributes| - lat = attributes['lat'].to_f - lon = attributes['lon'].to_f - gotlatlon = true - gotele = false - gotdate = false - @possible_points += 1 - end - - parser.listen( :characters, %w{ ele } ) do |text| - ele = text - gotele = true - end - - parser.listen( :characters, %w{ time } ) do |text| - if text && text != '' - begin - date = DateTime.parse(text) - gotdate = true - rescue - end - end - end - - parser.listen( :end_element, %w{ trkseg } ) do |uri, localname, qname| - @tracksegs += 1 - end - - parser.listen( :end_element, %w{ trkpt } ) do |uri,localname,qname| - if gotlatlon && gotdate - ele = '0' unless gotele - if lat < 90 && lat > -90 && lon > -180 && lon < 180 - @actual_points += 1 - yield Hash['latitude' => lat, 'longitude' => lon, 'timestamp' => date, 'altitude' => ele, 'segment' => @tracksegs] - end - end - gotlatlon = false - gotele = false - gotdate = false - end - - parser.parse - end - - def get_picture(min_lat, min_lon, max_lat, max_lon, num_points) - #puts "getting picfor bbox #{min_lat},#{min_lon} - #{max_lat},#{max_lon}" - frames = 10 - width = 250 - height = 250 - proj = OSM::Mercator.new(min_lat, min_lon, max_lat, max_lon, width, height) - - linegc = Magick::Draw.new - linegc.stroke_linejoin('miter') - linegc.stroke_width(1) - linegc.stroke('#BBBBBB') - linegc.fill('#BBBBBB') - - highlightgc = Magick::Draw.new - highlightgc.stroke_linejoin('miter') - highlightgc.stroke_width(3) - highlightgc.stroke('#000000') - highlightgc.fill('#000000') - - images = [] - - frames.times do - image = Magick::Image.new(width, height) do |image| - image.background_color = 'white' - image.format = 'GIF' - end - - images << image - end - - oldpx = 0.0 - oldpy = 0.0 - - first = true - - m = 0 - mm = 0 - points do |p| - px = proj.x(p['longitude']) - py = proj.y(p['latitude']) - - if m > 0 - frames.times do |n| - if n == mm - gc = highlightgc.dup - else - gc = linegc.dup - end - - gc.line(px, py, oldpx, oldpy) - - gc.draw(images[n]) - end - end - - m += 1 - if m > num_points.to_f / frames.to_f * (mm+1) - mm += 1 - end - - oldpy = py - oldpx = px - end - - il = Magick::ImageList.new - - images.each do |f| - il << f - end - - il.delay = 50 - il.format = 'GIF' - - return il.to_blob - end - - def get_icon(min_lat, min_lon, max_lat, max_lon) - #puts "getting icon for bbox #{min_lat},#{min_lon} - #{max_lat},#{max_lon}" - width = 50 - height = 50 - proj = OSM::Mercator.new(min_lat, min_lon, max_lat, max_lon, width, height) - - gc = Magick::Draw.new - gc.stroke_linejoin('miter') - gc.stroke_width(1) - gc.stroke('#000000') - gc.fill('#000000') - - image = Magick::Image.new(width, height) do |image| - image.background_color = 'white' - image.format = 'GIF' - end - - oldpx = 0.0 - oldpy = 0.0 - - first = true - - points do |p| - px = proj.x(p['longitude']) - py = proj.y(p['latitude']) - - gc.dup.line(px, py, oldpx, oldpy).draw(image) unless first - - first = false - oldpy = py - oldpx = px - end - - return image.to_blob - end - - end - class GreatCircle include Math @@ -277,7 +187,7 @@ module OSM def initialize(feed_title='OpenStreetMap GPS Traces', feed_description='OpenStreetMap GPS Traces', feed_url='http://www.openstreetmap.org/traces/') @doc = XML::Document.new @doc.encoding = 'UTF-8' - + rss = XML::Node.new 'rss' @doc.root = rss rss['version'] = "2.0" @@ -365,7 +275,7 @@ module OSM doc.encoding = 'UTF-8' root = XML::Node.new 'osm' root['version'] = API_VERSION - root['generator'] = 'OpenStreetMap server' + root['generator'] = GENERATOR doc.root = root return doc end @@ -422,4 +332,6 @@ module OSM return "#{tilesql} AND #{prefix}latitude BETWEEN #{minlat} AND #{maxlat} AND #{prefix}longitude BETWEEN #{minlon} AND #{maxlon}" end + + end