refactor: massive file restructure

lua/cp/setup/contest.lua

@@ -0,0 +1,39 @@
+local M = {}
+
+local logger = require('cp.log')
+local scrape = require('cp.scrape')
+local state = require('cp.state')
+
+function M.scrape_missing_problems(contest_id, missing_problems, config)
+  vim.fn.mkdir('io', 'p')
+
+  logger.log(('scraping %d uncached problems...'):format(#missing_problems))
+
+  local results =
+    scrape.scrape_problems_parallel(state.get_platform(), contest_id, missing_problems, config)
+
+  local success_count = 0
+  local failed_problems = {}
+  for problem_id, result in pairs(results) do
+    if result.success then
+      success_count = success_count + 1
+    else
+      table.insert(failed_problems, problem_id)
+    end
+  end
+
+  if #failed_problems > 0 then
+    logger.log(
+      ('scraping complete: %d/%d successful, failed: %s'):format(
+        success_count,
+        #missing_problems,
+        table.concat(failed_problems, ', ')
+      ),
+      vim.log.levels.WARN
+    )
+  else
+    logger.log(('scraping complete: %d/%d successful'):format(success_count, #missing_problems))
+  end
+end
+
+return M