server: add import LCSC feature

README.md

@@ -11,6 +11,8 @@ Distributors also need to be managed directly in the database.
 Since this does change very often, it isn't too much of a hassle.
 An example is in `populate.sql`, also with some other entries.
 
+To import an LCSC part, simply go to the `/import/lcsc/Cxxxx` page and the part will be added to the database.
+
 goals
 =====
 

server.rb

@@ -15,6 +15,8 @@ require 'set'
 require 'mysql2'
 require 'json'
 require 'sinatra'
+require 'uri'
+require 'net/http'
 
 # allow dumping crashes in browser
 DEBUG = false
@@ -365,3 +367,50 @@ post '/part' do
   end
   return 200
 end
+
+get '/import/lcsc/:lcsc' do
+  halt 401 unless params['lcsc'] and params['lcsc'] =~ /^C\d+$/i
+  uri = URI("https://wmsc.lcsc.com/wmsc/product/detail?productCode=#{params['lcsc']}")
+  res = Net::HTTP.get_response(uri)
+  halt 401, "could not get part" unless res.is_a?(Net::HTTPSuccess)
+  json = JSON.parse(res.body)
+  #puts json
+  halt 401, "part not found" unless 200 == json["code"] and json["result"]
+  result = json["result"]
+  part = {}
+  part["name"] = result["productModel"]
+  part["mpn"] = result["productModel"]
+  part["description"] = result["productDescEn"]
+  part["details"] = result["productIntroEn"]
+  part["manufacturer"] = result["brandNameEn"]
+  part["package"] = result["encapStandard"] # also includes pin count
+  part["distributors"] = {"LCSC" => result["productCode"]}
+  part["attachments"] = result["productImages"]
+  part["datasheet"] = result["pdfUrl"]
+  existing = get_part_by_name(part["name"])
+  halt 401, "part name already exists" if existing
+  puts part
+  begin
+    add_part(part)
+  rescue StandardError => e
+    halt 401, e.message
+  end
+  i = 0
+  (part["attachments"] + [part["datasheet"]]).each do |attachement|
+    file = attachement.split("/")[-1]
+    dir = PUBLIC + "/" + ATTACHMENTS + "/" + part["name"]
+    path = "#{dir}/#{i}_#{file}"
+    i += 1
+    unless File.file?(path) then
+      uri = URI(attachement)
+      res = Net::HTTP.get_response(uri)
+      if (res.is_a?(Net::HTTPSuccess)) then
+        Dir.mkdir(dir) unless File.directory?(dir)
+        File.open(path, "wb") do |f|
+          f.write res.body
+        end
+      end
+    end
+  end
+  return 200
+end