Allowing for query by region and magnitude, too

redis-with-ruby/earthquakes.rb

@@ -9,12 +9,13 @@ require 'open-uri'
 class Earthquakes
   DATA_URL = 'http://earthquake.usgs.gov/earthquakes/catalogs/eqs7day-M1.txt'
 
-  attr_accessor :id_set, :region_set
+  attr_accessor :id_set, :region_set, :magnitude_set
 
   def initialize
     @redis = Redis.new
-    @id_set = 'earthquakes'
+    @id_set = 'earthquake-ids'
     @region_set = 'earthquake-regions'
+    @magnitude_set = 'earthquake-magnitudes'
 
     @logger = Logger.new(STDOUT)
     @logger.formatter = proc do |severity, datetime, progname, msg|
@@ -23,25 +24,33 @@ class Earthquakes
   end
 
   def get_info(earthquake_id)
-    if not /^eqid:/.match(earthquake_id)
-      earthquake_id = "eqid:#{earthquake_id}"
+    @redis.hgetall(with_prefix(earthquake_id, 'eqid'))
   end
 
-    @redis.hgetall(earthquake_id)
+  def in_region(region)
+    @redis.smembers(with_prefix(region, 'eqregion'))
+  end
+
+  def with_magnitude(magnitude)
+    @redis.smembers(with_prefix(magnitude, 'eqmagnitude'))
   end
 
   def all_ids
-    @redis.smembers(@id_set).map { |i| i.gsub(/^eqid:/, '') }
+    @redis.smembers(@id_set).map { |i| sans_prefix(i, 'eqid') }
   end
 
   def all_regions
-    @redis.smembers(@region_set).map { |r| r.gsub(/^eqregion:/, '') }
+    @redis.smembers(@region_set).map { |r| sans_prefix(r, 'eqregion') }
+  end
+
+  def all_magnitudes
+    @redis.smembers(@magnitude_set).map { |m| sans_prefix(m, 'eqmagnitude') }
   end
 
   def drop_all
     @logger.info('Removing data for each earthquake')
     all_ids.each do |i|
-      @logger.info("Removing data for earthquake #{i.gsub(/^eqid:/, '')}")
+      @logger.info("Removing data for earthquake #{sans_prefix(i, 'eqid')}")
       @redis.del(i)
     end
 
@@ -50,6 +59,9 @@ class Earthquakes
 
     @logger.info('Removing earthquake region set')
     @redis.del(@region_set)
+
+    @logger.info('Removing earthquake magnitude set')
+    @redis.del(@magnitude_set)
   end
 
   def load_data
@@ -60,19 +72,35 @@ class Earthquakes
     data.each do |row|
       @redis.multi do |r|
         @logger.info("Adding earthquake #{row[:eqid]}")
-        key = "eqid:#{row[:eqid].downcase}"
-        r.sadd(@id_set, key)
+        id_key = with_prefix(row[:eqid].downcase, 'eqid')
+        r.sadd(@id_set, id_key)
         row.headers.each do |header|
-          r.hset(key, header.downcase, row[header])
+          r.hset(id_key, header.downcase, row[header].downcase)
         end
 
-        region_key = "eqregion:#{row[:region].downcase}"
-
-        r.sadd(region_key, key)
+        region_key = with_prefix(row[:region].downcase, 'eqregion')
+        r.sadd(region_key, id_key)
         r.sadd(@region_set, region_key)
+
+        magnitude_key = with_prefix(row[:magnitude], 'eqmagnitude')
+        r.sadd(magnitude_key, id_key)
+        r.sadd(@magnitude_set, magnitude_key)
       end
     end
   end
+
+  private
+  def with_prefix(key, prefix)
+    if not /^#{prefix}:/.match(key)
+      return "#{prefix}:#{key}"
+    end
+
+    key
+  end
+
+  def sans_prefix(key, prefix)
+    key.gsub(/^#{prefix}:/, '')
+  end
 end
 
 

redis-with-ruby/eq-info

@@ -1,5 +1,6 @@
 #!/usr/bin/env ruby
 
+require 'pp'
 require 'slop'
 
 require File.expand_path('../earthquakes', __FILE__)
@@ -8,12 +9,11 @@ require File.expand_path('../earthquakes', __FILE__)
 def main
   opts = Slop.parse(:help => true, :strict => true) do
     banner "#{File.basename(__FILE__)} [options]"
-    on :l, :listall, 'List all available earthquake ids.'
-    on :r, :listall_by_region, 'List available earthquakes by region'
-    #on :l, :'list-by-region', 'List available earthquakes by region'
-    #on :L, :'list-by-magnitude', 'List available earthquakes by magnitude'
-    #on :r, :region=, 'Show earthquakes for region'
-    #on :m, :magnitude=, 'Show earthquakes of magnitude'
+    on :L, :listall, 'List all available earthquake ids.'
+    on :R, :listall_regions, 'List available earthquake regions.'
+    on :M, :listall_magnitudes, 'List available earthquakes magnitudes.'
+    on :r, :region=, 'Show earthquakes for region.'
+    on :m, :magnitude=, 'Show earthquakes of magnitude.'
     on :i, :eqid=, 'Show all available info for earthquake with id.'
   end
 
@@ -24,19 +24,51 @@ def main
     return 0
   end
 
-  if opts.listall_by_region?
-    earthquakes.all_regions.each { |r| puts r }
+  if opts.listall_regions?
+    earthquakes.all_regions.sort.each { |r| puts r }
     return 0
   end
 
+  if opts.listall_magnitudes?
+    earthquakes.all_magnitudes.sort.each { |m| puts m }
+    return 0
+  end
+
+  if opts[:region]
+    puts "Earthquakes in region #{opts[:region]}"
+
+    results = []
+    earthquakes.in_region(opts[:region]).each do |i|
+      results << earthquakes.get_info(i)
+    end
+
+    puts results.to_yaml
+    return 0
+  end
+
+  if opts[:magnitude]
+    puts "Earthquakes with magnitude #{opts[:magnitude]}"
+
+    results = []
+    earthquakes.with_magnitude(opts[:magnitude]).each do |i|
+      results << earthquakes.get_info(i)
+    end
+
+    puts results.to_yaml
+    return 0
+  end
+
+  if opts[:eqid]
     puts "Earthquake with id of #{opts[:eqid]}"
     earthquakes.get_info(opts[:eqid]).each do |key, value|
       puts "    #{key}: #{value}"
     end
-
     return 0
   end
 
+  return 1
+end
+
 
 if $0 == __FILE__
   exit(main)