Add ansible library to modify json

Issue-ID: OOM-1551
Change-Id: I791bf7163a023ddc140cee22d474fcf532beae17
Signed-off-by: Petr Ospalý <p.ospaly@partner.samsung.com>

diff --git a/ansible/library/json_add.py b/ansible/library/json_add.py
new file mode 100644 (file)
index 0000000..6aad2d7
--- /dev/null
+++ b/ansible/library/json_add.py
@@ -0,0 +1,90 @@
+#!/usr/bin/python
+
+from ansible.module_utils.basic import AnsibleModule
+import json
+import os
+
+DOCUMENTATION="""
+---
+module: json_add
+descritption:
+  - This module will search top level objects in json and adds specified
+    value into list for specified key.
+  - If file does not exists module will create it automatically.
+
+options:
+  path:
+    required: true
+    aliases=[name, destfile, dest]
+    description:
+      - The json file to modify.
+  key:
+    required: true
+    description:
+      - Top level object.
+  value:
+    required: true
+    description:
+      - Value to add to specified key.
+"""
+
+def load_json(path):
+    if os.path.exists(path):
+        with open(path, 'r') as f:
+          return json.load(f)
+    else:
+        return {}
+
+def value_is_set(path, key, value, json_obj):
+    return value in json_obj.get(key, [])
+
+def insert_to_json(path, key, value, check_mode=False):
+    json_obj = load_json(path)
+    if not value_is_set(path, key, value, json_obj):
+        if not check_mode:
+            json_obj.setdefault(key, []).append(value)
+            store_json(path, json_obj)
+        return True, 'Value %s added to %s.' % (value, key)
+    else:
+        return False, ''
+
+def store_json(path, json_obj):
+    with open(path, 'w') as f:
+        json.dump(json_obj, f, indent=4)
+
+def check_file_attrs(module, changed, message, diff):
+    file_args = module.load_file_common_arguments(module.params)
+    if module.set_fs_attributes_if_different(file_args, False, diff=diff):
+
+        if changed:
+            message += ' '
+        changed = True
+        message += 'File attributes changed.'
+
+    return changed, message
+
+def run_module():
+    module = AnsibleModule(
+        argument_spec=dict(
+        path=dict(type='path', required=True, aliases=['name', 'destfile', 'dest']),
+        key=dict(type='str', required=True),
+        value=dict(type='str', required=True),
+        ),
+        add_file_common_args=True,
+        supports_check_mode=True
+    )
+    params = module.params
+    path = params['path']
+    key = params['key']
+    value = params['value']
+    try:
+        changed, msg = insert_to_json(path, key, value, module.check_mode)
+        fs_diff = {}
+        changed, msg = check_file_attrs(module, changed, msg, fs_diff)
+        module.exit_json(changed=changed, msg=msg, file_attr_diff=fs_diff)
+    except IOError as e:
+        module.fail_json(msg=e.msg)
+
+if __name__ == '__main__':
+    run_module()
+