From 368d79e5829f9ac470a9f1f7a57902830e3ecea9 Mon Sep 17 00:00:00 2001
From: Adabriand Furtado <adabriand@gmail.com>
Date: Mon, 20 Jun 2016 12:03:16 -0300
Subject: [PATCH] Adicionado um método na API para recuperar as últimas respostas de um projeto.

---
 pybossa/api/__init__.py     | 13 ++++++++++++-
 pybossa/cache/projects.py   | 33 +++++++++++++++++++++++++++++++++
 pybossa/core.py             |  2 ++
 pybossa/default_settings.py |  1 +
 4 files changed, 48 insertions(+), 1 deletion(-)

diff --git a/pybossa/api/__init__.py b/pybossa/api/__init__.py
index 29738fb..c594c9d 100644
--- a/pybossa/api/__init__.py
+++ b/pybossa/api/__init__.py
@@ -53,6 +53,7 @@ from result import ResultAPI
 from pybossa.core import project_repo, task_repo
 from pybossa.contributions_guard import ContributionsGuard
 from pybossa.cache import users as cached_users
+from pybossa.cache import projects as cached_projects
 
 blueprint = Blueprint('api', __name__)
 
@@ -188,8 +189,18 @@ def user_progress(project_id=None, short_name=None):
 @blueprint.route('/leaderboard')
 @crossdomain(origin='*', headers=cors_headers)
 @ratelimit(limit=ratelimits.get('LIMIT'), per=ratelimits.get('PER'))
-def leaderboard(limit=None):
+def leaderboard():
     user_id = None if current_user.is_anonymous() else current_user.id
     limit = request.args.get('limit')
     data = cached_users.get_complete_leaderboard(n=limit, user_id=user_id)
     return Response(json.dumps(data), mimetype="application/json")
+
+@jsonpify
+@blueprint.route('/project_last_answers')
+@crossdomain(origin='*', headers=cors_headers)
+@ratelimit(limit=ratelimits.get('LIMIT'), per=ratelimits.get('PER'))
+def project_last_answers():
+    user_id = None if current_user.is_anonymous() else current_user.id
+    project_id = request.args.get('project_id')
+    data = cached_projects.project_last_answers(project_id)
+    return Response(json.dumps(data), mimetype="application/json")
diff --git a/pybossa/cache/projects.py b/pybossa/cache/projects.py
index f2792ba..f5b7ba3 100644
--- a/pybossa/cache/projects.py
+++ b/pybossa/cache/projects.py
@@ -204,6 +204,39 @@ def last_activity(project_id):
             return None
 
 
+def project_last_answers_data(project_id):
+    """Return last answers from a project."""
+    sql = text('''
+                WITH last_answers AS (SELECT task_id, MAX(finish_time) AS timestamp
+                    FROM task_run WHERE project_id =:project_id GROUP BY task_id)
+                SELECT task_run.info AS taskrun_info, task.info AS task_info FROM task_run
+                   JOIN last_answers ON task_run.task_id = last_answers.task_id AND finish_time = timestamp
+                   JOIN task ON task_run.task_id = task.id''')
+
+    results = session.execute(sql, dict(project_id=project_id))
+    last_answers = []
+    for row in results:
+        answer = dict(
+            taskrun_info=row.taskrun_info,
+            task_info=row.task_info)
+        last_answers.append(answer)
+    return last_answers
+
+@memoize(timeout=timeouts.get('PROJECT_LAST_ANSWERS_TIMEOUT'))
+def project_last_answers(project_id):
+    projects = []
+    if project_id is None:
+        projects = session.query(Project).all()
+    else:
+        projects.append(session.query(Project).get(project_id))
+    results = []
+    for project in projects:
+        last_answers = dict()
+        last_answers['project_name'] = project.short_name
+        last_answers['last_answers'] = project_last_answers_data(project.id)
+        result.append(last_answers)
+    return results
+
 @memoize(timeout=timeouts.get('APP_TIMEOUT'))
 def average_contribution_time(project_id):
     sql = text('''SELECT
diff --git a/pybossa/core.py b/pybossa/core.py
index 6d449f6..ca7b758 100644
--- a/pybossa/core.py
+++ b/pybossa/core.py
@@ -567,6 +567,8 @@ def setup_cache_timeouts(app):
     timeouts['STATS_DRAFT_TIMEOUT'] = app.config['STATS_DRAFT_TIMEOUT']
     timeouts['N_APPS_PER_CATEGORY_TIMEOUT'] = \
         app.config['N_APPS_PER_CATEGORY_TIMEOUT']
+    timeouts['PROJECT_LAST_ANSWERS_TIMEOUT'] = \
+        app.config['PROJECT_LAST_ANSWERS_TIMEOUT']
     # Categories
     timeouts['CATEGORY_TIMEOUT'] = app.config['CATEGORY_TIMEOUT']
     # Users
diff --git a/pybossa/default_settings.py b/pybossa/default_settings.py
index b932dd3..deda8c1 100644
--- a/pybossa/default_settings.py
+++ b/pybossa/default_settings.py
@@ -75,6 +75,7 @@ STATS_APP_TIMEOUT = 12 * 60 * 60
 STATS_DRAFT_TIMEOUT = 24 * 60 * 60
 N_APPS_PER_CATEGORY_TIMEOUT = 60 * 60
 BROWSE_TASKS_TIMEOUT = 3 * 60 * 60
+PROJECT_LAST_ANSWERS_TIMEOUT = 5 * 60
 # Category cache
 CATEGORY_TIMEOUT = 24 * 60 * 60
 # User cache
--
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