diff --git a/.gitignore b/.gitignore
index b359132..7e75396 100644
--- a/.gitignore
+++ b/.gitignore
@@ -9,3 +9,4 @@ out
 tmp/
 /test*py
 data
+logs
diff --git a/LICENSE.md b/LICENSE.md
new file mode 100644
index 0000000..c6f01c6
--- /dev/null
+++ b/LICENSE.md
@@ -0,0 +1,660 @@
+# GNU AFFERO GENERAL PUBLIC LICENSE
+
+Version 3, 19 November 2007
+
+Copyright (C) 2007 Free Software Foundation, Inc.
+<https://fsf.org/>
+
+Everyone is permitted to copy and distribute verbatim copies of this
+license document, but changing it is not allowed.
+
+## Preamble
+
+The GNU Affero General Public License is a free, copyleft license for
+software and other kinds of works, specifically designed to ensure
+cooperation with the community in the case of network server software.
+
+The licenses for most software and other practical works are designed
+to take away your freedom to share and change the works. By contrast,
+our General Public Licenses are intended to guarantee your freedom to
+share and change all versions of a program--to make sure it remains
+free software for all its users.
+
+When we speak of free software, we are referring to freedom, not
+price. Our General Public Licenses are designed to make sure that you
+have the freedom to distribute copies of free software (and charge for
+them if you wish), that you receive source code or can get it if you
+want it, that you can change the software or use pieces of it in new
+free programs, and that you know you can do these things.
+
+Developers that use our General Public Licenses protect your rights
+with two steps: (1) assert copyright on the software, and (2) offer
+you this License which gives you legal permission to copy, distribute
+and/or modify the software.
+
+A secondary benefit of defending all users' freedom is that
+improvements made in alternate versions of the program, if they
+receive widespread use, become available for other developers to
+incorporate. Many developers of free software are heartened and
+encouraged by the resulting cooperation. However, in the case of
+software used on network servers, this result may fail to come about.
+The GNU General Public License permits making a modified version and
+letting the public access it on a server without ever releasing its
+source code to the public.
+
+The GNU Affero General Public License is designed specifically to
+ensure that, in such cases, the modified source code becomes available
+to the community. It requires the operator of a network server to
+provide the source code of the modified version running there to the
+users of that server. Therefore, public use of a modified version, on
+a publicly accessible server, gives the public access to the source
+code of the modified version.
+
+An older license, called the Affero General Public License and
+published by Affero, was designed to accomplish similar goals. This is
+a different license, not a version of the Affero GPL, but Affero has
+released a new version of the Affero GPL which permits relicensing
+under this license.
+
+The precise terms and conditions for copying, distribution and
+modification follow.
+
+## TERMS AND CONDITIONS
+
+### 0. Definitions.
+
+"This License" refers to version 3 of the GNU Affero General Public
+License.
+
+"Copyright" also means copyright-like laws that apply to other kinds
+of works, such as semiconductor masks.
+
+"The Program" refers to any copyrightable work licensed under this
+License. Each licensee is addressed as "you". "Licensees" and
+"recipients" may be individuals or organizations.
+
+To "modify" a work means to copy from or adapt all or part of the work
+in a fashion requiring copyright permission, other than the making of
+an exact copy. The resulting work is called a "modified version" of
+the earlier work or a work "based on" the earlier work.
+
+A "covered work" means either the unmodified Program or a work based
+on the Program.
+
+To "propagate" a work means to do anything with it that, without
+permission, would make you directly or secondarily liable for
+infringement under applicable copyright law, except executing it on a
+computer or modifying a private copy. Propagation includes copying,
+distribution (with or without modification), making available to the
+public, and in some countries other activities as well.
+
+To "convey" a work means any kind of propagation that enables other
+parties to make or receive copies. Mere interaction with a user
+through a computer network, with no transfer of a copy, is not
+conveying.
+
+An interactive user interface displays "Appropriate Legal Notices" to
+the extent that it includes a convenient and prominently visible
+feature that (1) displays an appropriate copyright notice, and (2)
+tells the user that there is no warranty for the work (except to the
+extent that warranties are provided), that licensees may convey the
+work under this License, and how to view a copy of this License. If
+the interface presents a list of user commands or options, such as a
+menu, a prominent item in the list meets this criterion.
+
+### 1. Source Code.
+
+The "source code" for a work means the preferred form of the work for
+making modifications to it. "Object code" means any non-source form of
+a work.
+
+A "Standard Interface" means an interface that either is an official
+standard defined by a recognized standards body, or, in the case of
+interfaces specified for a particular programming language, one that
+is widely used among developers working in that language.
+
+The "System Libraries" of an executable work include anything, other
+than the work as a whole, that (a) is included in the normal form of
+packaging a Major Component, but which is not part of that Major
+Component, and (b) serves only to enable use of the work with that
+Major Component, or to implement a Standard Interface for which an
+implementation is available to the public in source code form. A
+"Major Component", in this context, means a major essential component
+(kernel, window system, and so on) of the specific operating system
+(if any) on which the executable work runs, or a compiler used to
+produce the work, or an object code interpreter used to run it.
+
+The "Corresponding Source" for a work in object code form means all
+the source code needed to generate, install, and (for an executable
+work) run the object code and to modify the work, including scripts to
+control those activities. However, it does not include the work's
+System Libraries, or general-purpose tools or generally available free
+programs which are used unmodified in performing those activities but
+which are not part of the work. For example, Corresponding Source
+includes interface definition files associated with source files for
+the work, and the source code for shared libraries and dynamically
+linked subprograms that the work is specifically designed to require,
+such as by intimate data communication or control flow between those
+subprograms and other parts of the work.
+
+The Corresponding Source need not include anything that users can
+regenerate automatically from other parts of the Corresponding Source.
+
+The Corresponding Source for a work in source code form is that same
+work.
+
+### 2. Basic Permissions.
+
+All rights granted under this License are granted for the term of
+copyright on the Program, and are irrevocable provided the stated
+conditions are met. This License explicitly affirms your unlimited
+permission to run the unmodified Program. The output from running a
+covered work is covered by this License only if the output, given its
+content, constitutes a covered work. This License acknowledges your
+rights of fair use or other equivalent, as provided by copyright law.
+
+You may make, run and propagate covered works that you do not convey,
+without conditions so long as your license otherwise remains in force.
+You may convey covered works to others for the sole purpose of having
+them make modifications exclusively for you, or provide you with
+facilities for running those works, provided that you comply with the
+terms of this License in conveying all material for which you do not
+control copyright. Those thus making or running the covered works for
+you must do so exclusively on your behalf, under your direction and
+control, on terms that prohibit them from making any copies of your
+copyrighted material outside their relationship with you.
+
+Conveying under any other circumstances is permitted solely under the
+conditions stated below. Sublicensing is not allowed; section 10 makes
+it unnecessary.
+
+### 3. Protecting Users' Legal Rights From Anti-Circumvention Law.
+
+No covered work shall be deemed part of an effective technological
+measure under any applicable law fulfilling obligations under article
+11 of the WIPO copyright treaty adopted on 20 December 1996, or
+similar laws prohibiting or restricting circumvention of such
+measures.
+
+When you convey a covered work, you waive any legal power to forbid
+circumvention of technological measures to the extent such
+circumvention is effected by exercising rights under this License with
+respect to the covered work, and you disclaim any intention to limit
+operation or modification of the work as a means of enforcing, against
+the work's users, your or third parties' legal rights to forbid
+circumvention of technological measures.
+
+### 4. Conveying Verbatim Copies.
+
+You may convey verbatim copies of the Program's source code as you
+receive it, in any medium, provided that you conspicuously and
+appropriately publish on each copy an appropriate copyright notice;
+keep intact all notices stating that this License and any
+non-permissive terms added in accord with section 7 apply to the code;
+keep intact all notices of the absence of any warranty; and give all
+recipients a copy of this License along with the Program.
+
+You may charge any price or no price for each copy that you convey,
+and you may offer support or warranty protection for a fee.
+
+### 5. Conveying Modified Source Versions.
+
+You may convey a work based on the Program, or the modifications to
+produce it from the Program, in the form of source code under the
+terms of section 4, provided that you also meet all of these
+conditions:
+
+-   a) The work must carry prominent notices stating that you modified
+    it, and giving a relevant date.
+-   b) The work must carry prominent notices stating that it is
+    released under this License and any conditions added under
+    section 7. This requirement modifies the requirement in section 4
+    to "keep intact all notices".
+-   c) You must license the entire work, as a whole, under this
+    License to anyone who comes into possession of a copy. This
+    License will therefore apply, along with any applicable section 7
+    additional terms, to the whole of the work, and all its parts,
+    regardless of how they are packaged. This License gives no
+    permission to license the work in any other way, but it does not
+    invalidate such permission if you have separately received it.
+-   d) If the work has interactive user interfaces, each must display
+    Appropriate Legal Notices; however, if the Program has interactive
+    interfaces that do not display Appropriate Legal Notices, your
+    work need not make them do so.
+
+A compilation of a covered work with other separate and independent
+works, which are not by their nature extensions of the covered work,
+and which are not combined with it such as to form a larger program,
+in or on a volume of a storage or distribution medium, is called an
+"aggregate" if the compilation and its resulting copyright are not
+used to limit the access or legal rights of the compilation's users
+beyond what the individual works permit. Inclusion of a covered work
+in an aggregate does not cause this License to apply to the other
+parts of the aggregate.
+
+### 6. Conveying Non-Source Forms.
+
+You may convey a covered work in object code form under the terms of
+sections 4 and 5, provided that you also convey the machine-readable
+Corresponding Source under the terms of this License, in one of these
+ways:
+
+-   a) Convey the object code in, or embodied in, a physical product
+    (including a physical distribution medium), accompanied by the
+    Corresponding Source fixed on a durable physical medium
+    customarily used for software interchange.
+-   b) Convey the object code in, or embodied in, a physical product
+    (including a physical distribution medium), accompanied by a
+    written offer, valid for at least three years and valid for as
+    long as you offer spare parts or customer support for that product
+    model, to give anyone who possesses the object code either (1) a
+    copy of the Corresponding Source for all the software in the
+    product that is covered by this License, on a durable physical
+    medium customarily used for software interchange, for a price no
+    more than your reasonable cost of physically performing this
+    conveying of source, or (2) access to copy the Corresponding
+    Source from a network server at no charge.
+-   c) Convey individual copies of the object code with a copy of the
+    written offer to provide the Corresponding Source. This
+    alternative is allowed only occasionally and noncommercially, and
+    only if you received the object code with such an offer, in accord
+    with subsection 6b.
+-   d) Convey the object code by offering access from a designated
+    place (gratis or for a charge), and offer equivalent access to the
+    Corresponding Source in the same way through the same place at no
+    further charge. You need not require recipients to copy the
+    Corresponding Source along with the object code. If the place to
+    copy the object code is a network server, the Corresponding Source
+    may be on a different server (operated by you or a third party)
+    that supports equivalent copying facilities, provided you maintain
+    clear directions next to the object code saying where to find the
+    Corresponding Source. Regardless of what server hosts the
+    Corresponding Source, you remain obligated to ensure that it is
+    available for as long as needed to satisfy these requirements.
+-   e) Convey the object code using peer-to-peer transmission,
+    provided you inform other peers where the object code and
+    Corresponding Source of the work are being offered to the general
+    public at no charge under subsection 6d.
+
+A separable portion of the object code, whose source code is excluded
+from the Corresponding Source as a System Library, need not be
+included in conveying the object code work.
+
+A "User Product" is either (1) a "consumer product", which means any
+tangible personal property which is normally used for personal,
+family, or household purposes, or (2) anything designed or sold for
+incorporation into a dwelling. In determining whether a product is a
+consumer product, doubtful cases shall be resolved in favor of
+coverage. For a particular product received by a particular user,
+"normally used" refers to a typical or common use of that class of
+product, regardless of the status of the particular user or of the way
+in which the particular user actually uses, or expects or is expected
+to use, the product. A product is a consumer product regardless of
+whether the product has substantial commercial, industrial or
+non-consumer uses, unless such uses represent the only significant
+mode of use of the product.
+
+"Installation Information" for a User Product means any methods,
+procedures, authorization keys, or other information required to
+install and execute modified versions of a covered work in that User
+Product from a modified version of its Corresponding Source. The
+information must suffice to ensure that the continued functioning of
+the modified object code is in no case prevented or interfered with
+solely because modification has been made.
+
+If you convey an object code work under this section in, or with, or
+specifically for use in, a User Product, and the conveying occurs as
+part of a transaction in which the right of possession and use of the
+User Product is transferred to the recipient in perpetuity or for a
+fixed term (regardless of how the transaction is characterized), the
+Corresponding Source conveyed under this section must be accompanied
+by the Installation Information. But this requirement does not apply
+if neither you nor any third party retains the ability to install
+modified object code on the User Product (for example, the work has
+been installed in ROM).
+
+The requirement to provide Installation Information does not include a
+requirement to continue to provide support service, warranty, or
+updates for a work that has been modified or installed by the
+recipient, or for the User Product in which it has been modified or
+installed. Access to a network may be denied when the modification
+itself materially and adversely affects the operation of the network
+or violates the rules and protocols for communication across the
+network.
+
+Corresponding Source conveyed, and Installation Information provided,
+in accord with this section must be in a format that is publicly
+documented (and with an implementation available to the public in
+source code form), and must require no special password or key for
+unpacking, reading or copying.
+
+### 7. Additional Terms.
+
+"Additional permissions" are terms that supplement the terms of this
+License by making exceptions from one or more of its conditions.
+Additional permissions that are applicable to the entire Program shall
+be treated as though they were included in this License, to the extent
+that they are valid under applicable law. If additional permissions
+apply only to part of the Program, that part may be used separately
+under those permissions, but the entire Program remains governed by
+this License without regard to the additional permissions.
+
+When you convey a copy of a covered work, you may at your option
+remove any additional permissions from that copy, or from any part of
+it. (Additional permissions may be written to require their own
+removal in certain cases when you modify the work.) You may place
+additional permissions on material, added by you to a covered work,
+for which you have or can give appropriate copyright permission.
+
+Notwithstanding any other provision of this License, for material you
+add to a covered work, you may (if authorized by the copyright holders
+of that material) supplement the terms of this License with terms:
+
+-   a) Disclaiming warranty or limiting liability differently from the
+    terms of sections 15 and 16 of this License; or
+-   b) Requiring preservation of specified reasonable legal notices or
+    author attributions in that material or in the Appropriate Legal
+    Notices displayed by works containing it; or
+-   c) Prohibiting misrepresentation of the origin of that material,
+    or requiring that modified versions of such material be marked in
+    reasonable ways as different from the original version; or
+-   d) Limiting the use for publicity purposes of names of licensors
+    or authors of the material; or
+-   e) Declining to grant rights under trademark law for use of some
+    trade names, trademarks, or service marks; or
+-   f) Requiring indemnification of licensors and authors of that
+    material by anyone who conveys the material (or modified versions
+    of it) with contractual assumptions of liability to the recipient,
+    for any liability that these contractual assumptions directly
+    impose on those licensors and authors.
+
+All other non-permissive additional terms are considered "further
+restrictions" within the meaning of section 10. If the Program as you
+received it, or any part of it, contains a notice stating that it is
+governed by this License along with a term that is a further
+restriction, you may remove that term. If a license document contains
+a further restriction but permits relicensing or conveying under this
+License, you may add to a covered work material governed by the terms
+of that license document, provided that the further restriction does
+not survive such relicensing or conveying.
+
+If you add terms to a covered work in accord with this section, you
+must place, in the relevant source files, a statement of the
+additional terms that apply to those files, or a notice indicating
+where to find the applicable terms.
+
+Additional terms, permissive or non-permissive, may be stated in the
+form of a separately written license, or stated as exceptions; the
+above requirements apply either way.
+
+### 8. Termination.
+
+You may not propagate or modify a covered work except as expressly
+provided under this License. Any attempt otherwise to propagate or
+modify it is void, and will automatically terminate your rights under
+this License (including any patent licenses granted under the third
+paragraph of section 11).
+
+However, if you cease all violation of this License, then your license
+from a particular copyright holder is reinstated (a) provisionally,
+unless and until the copyright holder explicitly and finally
+terminates your license, and (b) permanently, if the copyright holder
+fails to notify you of the violation by some reasonable means prior to
+60 days after the cessation.
+
+Moreover, your license from a particular copyright holder is
+reinstated permanently if the copyright holder notifies you of the
+violation by some reasonable means, this is the first time you have
+received notice of violation of this License (for any work) from that
+copyright holder, and you cure the violation prior to 30 days after
+your receipt of the notice.
+
+Termination of your rights under this section does not terminate the
+licenses of parties who have received copies or rights from you under
+this License. If your rights have been terminated and not permanently
+reinstated, you do not qualify to receive new licenses for the same
+material under section 10.
+
+### 9. Acceptance Not Required for Having Copies.
+
+You are not required to accept this License in order to receive or run
+a copy of the Program. Ancillary propagation of a covered work
+occurring solely as a consequence of using peer-to-peer transmission
+to receive a copy likewise does not require acceptance. However,
+nothing other than this License grants you permission to propagate or
+modify any covered work. These actions infringe copyright if you do
+not accept this License. Therefore, by modifying or propagating a
+covered work, you indicate your acceptance of this License to do so.
+
+### 10. Automatic Licensing of Downstream Recipients.
+
+Each time you convey a covered work, the recipient automatically
+receives a license from the original licensors, to run, modify and
+propagate that work, subject to this License. You are not responsible
+for enforcing compliance by third parties with this License.
+
+An "entity transaction" is a transaction transferring control of an
+organization, or substantially all assets of one, or subdividing an
+organization, or merging organizations. If propagation of a covered
+work results from an entity transaction, each party to that
+transaction who receives a copy of the work also receives whatever
+licenses to the work the party's predecessor in interest had or could
+give under the previous paragraph, plus a right to possession of the
+Corresponding Source of the work from the predecessor in interest, if
+the predecessor has it or can get it with reasonable efforts.
+
+You may not impose any further restrictions on the exercise of the
+rights granted or affirmed under this License. For example, you may
+not impose a license fee, royalty, or other charge for exercise of
+rights granted under this License, and you may not initiate litigation
+(including a cross-claim or counterclaim in a lawsuit) alleging that
+any patent claim is infringed by making, using, selling, offering for
+sale, or importing the Program or any portion of it.
+
+### 11. Patents.
+
+A "contributor" is a copyright holder who authorizes use under this
+License of the Program or a work on which the Program is based. The
+work thus licensed is called the contributor's "contributor version".
+
+A contributor's "essential patent claims" are all patent claims owned
+or controlled by the contributor, whether already acquired or
+hereafter acquired, that would be infringed by some manner, permitted
+by this License, of making, using, or selling its contributor version,
+but do not include claims that would be infringed only as a
+consequence of further modification of the contributor version. For
+purposes of this definition, "control" includes the right to grant
+patent sublicenses in a manner consistent with the requirements of
+this License.
+
+Each contributor grants you a non-exclusive, worldwide, royalty-free
+patent license under the contributor's essential patent claims, to
+make, use, sell, offer for sale, import and otherwise run, modify and
+propagate the contents of its contributor version.
+
+In the following three paragraphs, a "patent license" is any express
+agreement or commitment, however denominated, not to enforce a patent
+(such as an express permission to practice a patent or covenant not to
+sue for patent infringement). To "grant" such a patent license to a
+party means to make such an agreement or commitment not to enforce a
+patent against the party.
+
+If you convey a covered work, knowingly relying on a patent license,
+and the Corresponding Source of the work is not available for anyone
+to copy, free of charge and under the terms of this License, through a
+publicly available network server or other readily accessible means,
+then you must either (1) cause the Corresponding Source to be so
+available, or (2) arrange to deprive yourself of the benefit of the
+patent license for this particular work, or (3) arrange, in a manner
+consistent with the requirements of this License, to extend the patent
+license to downstream recipients. "Knowingly relying" means you have
+actual knowledge that, but for the patent license, your conveying the
+covered work in a country, or your recipient's use of the covered work
+in a country, would infringe one or more identifiable patents in that
+country that you have reason to believe are valid.
+
+If, pursuant to or in connection with a single transaction or
+arrangement, you convey, or propagate by procuring conveyance of, a
+covered work, and grant a patent license to some of the parties
+receiving the covered work authorizing them to use, propagate, modify
+or convey a specific copy of the covered work, then the patent license
+you grant is automatically extended to all recipients of the covered
+work and works based on it.
+
+A patent license is "discriminatory" if it does not include within the
+scope of its coverage, prohibits the exercise of, or is conditioned on
+the non-exercise of one or more of the rights that are specifically
+granted under this License. You may not convey a covered work if you
+are a party to an arrangement with a third party that is in the
+business of distributing software, under which you make payment to the
+third party based on the extent of your activity of conveying the
+work, and under which the third party grants, to any of the parties
+who would receive the covered work from you, a discriminatory patent
+license (a) in connection with copies of the covered work conveyed by
+you (or copies made from those copies), or (b) primarily for and in
+connection with specific products or compilations that contain the
+covered work, unless you entered into that arrangement, or that patent
+license was granted, prior to 28 March 2007.
+
+Nothing in this License shall be construed as excluding or limiting
+any implied license or other defenses to infringement that may
+otherwise be available to you under applicable patent law.
+
+### 12. No Surrender of Others' Freedom.
+
+If conditions are imposed on you (whether by court order, agreement or
+otherwise) that contradict the conditions of this License, they do not
+excuse you from the conditions of this License. If you cannot convey a
+covered work so as to satisfy simultaneously your obligations under
+this License and any other pertinent obligations, then as a
+consequence you may not convey it at all. For example, if you agree to
+terms that obligate you to collect a royalty for further conveying
+from those to whom you convey the Program, the only way you could
+satisfy both those terms and this License would be to refrain entirely
+from conveying the Program.
+
+### 13. Remote Network Interaction; Use with the GNU General Public License.
+
+Notwithstanding any other provision of this License, if you modify the
+Program, your modified version must prominently offer all users
+interacting with it remotely through a computer network (if your
+version supports such interaction) an opportunity to receive the
+Corresponding Source of your version by providing access to the
+Corresponding Source from a network server at no charge, through some
+standard or customary means of facilitating copying of software. This
+Corresponding Source shall include the Corresponding Source for any
+work covered by version 3 of the GNU General Public License that is
+incorporated pursuant to the following paragraph.
+
+Notwithstanding any other provision of this License, you have
+permission to link or combine any covered work with a work licensed
+under version 3 of the GNU General Public License into a single
+combined work, and to convey the resulting work. The terms of this
+License will continue to apply to the part which is the covered work,
+but the work with which it is combined will remain governed by version
+3 of the GNU General Public License.
+
+### 14. Revised Versions of this License.
+
+The Free Software Foundation may publish revised and/or new versions
+of the GNU Affero General Public License from time to time. Such new
+versions will be similar in spirit to the present version, but may
+differ in detail to address new problems or concerns.
+
+Each version is given a distinguishing version number. If the Program
+specifies that a certain numbered version of the GNU Affero General
+Public License "or any later version" applies to it, you have the
+option of following the terms and conditions either of that numbered
+version or of any later version published by the Free Software
+Foundation. If the Program does not specify a version number of the
+GNU Affero General Public License, you may choose any version ever
+published by the Free Software Foundation.
+
+If the Program specifies that a proxy can decide which future versions
+of the GNU Affero General Public License can be used, that proxy's
+public statement of acceptance of a version permanently authorizes you
+to choose that version for the Program.
+
+Later license versions may give you additional or different
+permissions. However, no additional obligations are imposed on any
+author or copyright holder as a result of your choosing to follow a
+later version.
+
+### 15. Disclaimer of Warranty.
+
+THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY
+APPLICABLE LAW. EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT
+HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT
+WARRANTY OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT
+LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+A PARTICULAR PURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND
+PERFORMANCE OF THE PROGRAM IS WITH YOU. SHOULD THE PROGRAM PROVE
+DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING, REPAIR OR
+CORRECTION.
+
+### 16. Limitation of Liability.
+
+IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
+WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR
+CONVEYS THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES,
+INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES
+ARISING OUT OF THE USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT
+NOT LIMITED TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR
+LOSSES SUSTAINED BY YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM
+TO OPERATE WITH ANY OTHER PROGRAMS), EVEN IF SUCH HOLDER OR OTHER
+PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
+
+### 17. Interpretation of Sections 15 and 16.
+
+If the disclaimer of warranty and limitation of liability provided
+above cannot be given local legal effect according to their terms,
+reviewing courts shall apply local law that most closely approximates
+an absolute waiver of all civil liability in connection with the
+Program, unless a warranty or assumption of liability accompanies a
+copy of the Program in return for a fee.
+
+END OF TERMS AND CONDITIONS
+
+## How to Apply These Terms to Your New Programs
+
+If you develop a new program, and you want it to be of the greatest
+possible use to the public, the best way to achieve this is to make it
+free software which everyone can redistribute and change under these
+terms.
+
+To do so, attach the following notices to the program. It is safest to
+attach them to the start of each source file to most effectively state
+the exclusion of warranty; and each file should have at least the
+"copyright" line and a pointer to where the full notice is found.
+
+        <one line to give the program's name and a brief idea of what it does.>
+        Copyright (C) <year>  <name of author>
+
+        This program is free software: you can redistribute it and/or modify
+        it under the terms of the GNU Affero General Public License as
+        published by the Free Software Foundation, either version 3 of the
+        License, or (at your option) any later version.
+
+        This program is distributed in the hope that it will be useful,
+        but WITHOUT ANY WARRANTY; without even the implied warranty of
+        MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+        GNU Affero General Public License for more details.
+
+        You should have received a copy of the GNU Affero General Public License
+        along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+Also add information on how to contact you by electronic and paper
+mail.
+
+If your software can interact with users remotely through a computer
+network, you should also make sure that it provides a way for users to
+get its source. For example, if your program is a web application, its
+interface could display a "Source" link that leads users to an archive
+of the code. There are many ways you could offer source, and different
+solutions will be better for different programs; see section 13 for
+the specific requirements.
+
+You should also get your employer (if you work as a programmer) or
+school, if any, to sign a "copyright disclaimer" for the program, if
+necessary. For more information on this, and how to apply and follow
+the GNU AGPL, see <https://www.gnu.org/licenses/>.
diff --git a/README.md b/README.md
index e69de29..3d0a0bc 100644
--- a/README.md
+++ b/README.md
@@ -0,0 +1,27 @@
+# republisher-redux
+
+``` shell
+mkdir logs out
+poetry install
+poetry run repub
+```
+
+
+## License
+
+republisher-redux, a tool to mirror RSS/ATOM feeds completely offline
+
+Copyright (C) 2024 Abel Luck
+
+This program is free software: you can redistribute it and/or modify
+it under the terms of the GNU Affero General Public License as
+published by the Free Software Foundation, either version 3 of the
+License, or (at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU Affero General Public License for more details.
+
+You should have received a copy of the GNU Affero General Public License
+along with this program.  If not, see <https://www.gnu.org/licenses/>.
diff --git a/poetry.lock b/poetry.lock
index 80da2e0..735c2e1 100644
--- a/poetry.lock
+++ b/poetry.lock
@@ -539,13 +539,13 @@ files = [
 
 [[package]]
 name = "itemloaders"
-version = "1.1.0"
+version = "1.2.0"
 description = "Base library for scrapy's ItemLoader"
 optional = false
-python-versions = ">=3.7"
+python-versions = ">=3.8"
 files = [
-    {file = "itemloaders-1.1.0-py3-none-any.whl", hash = "sha256:c8c82fe0c11fc4cdd08ec04df0b3c43f3cb7190002edb517e02d55de8efc2aeb"},
-    {file = "itemloaders-1.1.0.tar.gz", hash = "sha256:21d81c61da6a08b48e5996288cdf3031c0f92e5d0075920a0242527523e14a48"},
+    {file = "itemloaders-1.2.0-py3-none-any.whl", hash = "sha256:6ec5753dafdc69262774694c78c9ec44605672586b40a7134a097a5df601a442"},
+    {file = "itemloaders-1.2.0.tar.gz", hash = "sha256:fc2307f984116b010d6101a68a6a133ac8de927320b0ab696f31ad710a8d8d98"},
 ]
 
 [package.dependencies]
@@ -890,6 +890,92 @@ files = [
     {file = "pbr-6.0.0.tar.gz", hash = "sha256:d1377122a5a00e2f940ee482999518efe16d745d423a670c27773dfbc3c9a7d9"},
 ]
 
+[[package]]
+name = "pillow"
+version = "10.3.0"
+description = "Python Imaging Library (Fork)"
+optional = false
+python-versions = ">=3.8"
+files = [
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+    {file = "pillow-10.3.0-pp39-pypy39_pp73-manylinux_2_28_x86_64.whl", hash = "sha256:1a1d1915db1a4fdb2754b9de292642a39a7fb28f1736699527bb649484fb966a"},
+    {file = "pillow-10.3.0-pp39-pypy39_pp73-win_amd64.whl", hash = "sha256:a0eaa93d054751ee9964afa21c06247779b90440ca41d184aeb5d410f20ff591"},
+    {file = "pillow-10.3.0.tar.gz", hash = "sha256:9d2455fbf44c914840c793e89aa82d0e1763a14253a000743719ae5946814b2d"},
+]
+
+[package.extras]
+docs = ["furo", "olefile", "sphinx (>=2.4)", "sphinx-copybutton", "sphinx-inline-tabs", "sphinx-removed-in", "sphinxext-opengraph"]
+fpx = ["olefile"]
+mic = ["olefile"]
+tests = ["check-manifest", "coverage", "defusedxml", "markdown2", "olefile", "packaging", "pyroma", "pytest", "pytest-cov", "pytest-timeout"]
+typing = ["typing-extensions"]
+xmp = ["defusedxml"]
+
 [[package]]
 name = "platformdirs"
 version = "4.2.0"
@@ -1514,4 +1600,4 @@ testing = ["coverage (>=5.0.3)", "zope.event", "zope.testing"]
 [metadata]
 lock-version = "2.0"
 python-versions = "^3.11"
-content-hash = "c7cada0d348ebdcb48a3468d0b45aa8509b57ab3cd4d3c4065421bb0c0f1f57b"
+content-hash = "8b12b19145242fe86f09024453bca29792f6e22b4e63cfc72e2c6e480f38f043"
diff --git a/pyproject.toml b/pyproject.toml
index f819538..cc9cc4a 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -16,6 +16,7 @@ python-dateutil = "^2.9.0.post0"
 colorlog = "^6.8.2"
 feedparser = "^6.0.11"
 lxml = "^5.2.1"
+pillow = "^10.3.0"
 
 
 [build-system]
diff --git a/repub/entrypoint.py b/repub/entrypoint.py
index 71205cb..7a6357d 100644
--- a/repub/entrypoint.py
+++ b/repub/entrypoint.py
@@ -1,30 +1,88 @@
-from scrapy.crawler import CrawlerProcess
-from scrapy.utils.project import get_project_settings
+import logging
+import multiprocessing as mp
+import multiprocessing.connection as mpc
 
-from . import colorlog
-from .postprocessing import SortRssItems
-from .spiders.rss_spider import RssFeedSpider
-
-base_settings = get_project_settings()
-
-settings = {
-    **base_settings,
-    "FEEDS": {
-        "out/feed.rss": {
-            "format": "rss",
-            "postprocessing": [],
-        },
-    },
+feeds = {
+    "gp-pod": {"url": "https://guardianproject.info/podcast/podcast.xml"},
+    "nasa": {"url": "https://www.nasa.gov/rss/dyn/breaking_news.rss"},
 }
 
-colorlog.load_colorlog()
+logger = logging.getLogger(__name__)
+logger.setLevel(logging.DEBUG)
+ch = logging.StreamHandler()
+ch.setLevel(logging.DEBUG)
+formatter = logging.Formatter("%(asctime)s - %(name)s - %(levelname)s - %(message)s")
+ch.setFormatter(formatter)
+logger.addHandler(ch)
 
 
-urls = ["https://www.nasa.gov/rss/dyn/breaking_news.rss"]
+class FeedNameFilter:
+    def __init__(self, feed_options):
+        self.feed_options = feed_options
+
+    def accepts(self, item):
+        return item.feed_name == self.feed_options["feed_name"]
+
+
+def execute_spider(queue, name, url):
+    from scrapy.crawler import CrawlerProcess
+    from scrapy.settings import Settings
+    from scrapy.utils.project import get_project_settings
+
+    from .spiders.rss_spider import RssFeedSpider
+
+    try:
+        settings: Settings = {
+            **get_project_settings(),
+            "REPUBLISHER_OUT_DIR": "out",
+            "FEEDS": {
+                f"out/{name}.rss": {
+                    "format": "rss",
+                    "postprocessing": [],
+                    # "item_filter": FeedNameFilter,
+                    "feed_name": name,
+                }
+            },
+            "ITEM_PIPELINES": {
+                "repub.pipelines.ImagePipeline": 1,
+                "repub.pipelines.AudioPipeline": 2,
+                "repub.pipelines.VideoPipeline": 3,
+                "repub.pipelines.FilePipeline": 4,
+            },
+            "LOG_FILE": f"logs/{name}.log",
+            "REPUBLISHER_IMAGE_DIR": "images",
+            "REPUBLISHER_VIDEO_DIR": "video",
+            "REPUBLISHER_AUDIO_DIR": "audio",
+            "REPUBLISHER_FILE_DIR": "files",
+            "IMAGES_STORE": f"out/{name}/images",
+            "AUDIO_STORE": f"out/{name}/audio",
+            "VIDEO_STORE": f"out/{name}/images",
+            "FILES_STORE": f"out/{name}/files",
+        }
+        process = CrawlerProcess(settings)
+        # colorlog.load_colorlog()
+        process.crawl(RssFeedSpider, feed_name=name, urls=[url])
+        process.start()
+        queue.put(None)
+    except Exception as e:
+        queue.put(e)
 
 
 def entrypoint():
-    process = CrawlerProcess(settings)
-
-    process.crawl(RssFeedSpider, urls=urls)
-    process.start()  # the script will block here until the crawling is finished
+    pool = []
+    for name, data in feeds.items():
+        logger.info(f"Starting feed {name}")
+        queue = mp.Queue()
+        process = mp.Process(target=execute_spider, args=(queue, name, data["url"]))
+        pool.append((name, process, queue))
+    for n, proc, q in pool:
+        proc.start()
+    mpc.wait(p.sentinel for n, p, q in pool)
+    for name, p, q in pool:
+        result = q.get()
+        if result is not None:
+            print()
+            logger.error(f"Feed {name} encountered error")
+            logger.critical(result, exc_info=True)
+        else:
+            logger.info(f"Feed {name} completed successfully")
diff --git a/repub/exporters.py b/repub/exporters.py
index ee28b53..21d6fcb 100644
--- a/repub/exporters.py
+++ b/repub/exporters.py
@@ -28,7 +28,7 @@ class RssExporter(BaseItemExporter):
             self.flush_buffer()
             return
 
-        if not self.channel:
+        if self.channel is None:
             self.item_buffer.append(item)
         else:
             self.export_rss_item(item)
diff --git a/repub/items.py b/repub/items.py
index 4cb36f2..748858e 100644
--- a/repub/items.py
+++ b/repub/items.py
@@ -1,12 +1,24 @@
 from dataclasses import dataclass
-from typing import Any
+from typing import Any, List
 
 
 @dataclass
 class ElementItem:
+    feed_name: str
     el: Any
+    image_urls: List[str]
+    images: List[Any]
+    file_urls: List[str]
+    files: List[Any]
+    audio_urls: List[str]
+    audios: List[Any]
+    video_urls: List[str]
+    videos: List[Any]
 
 
 @dataclass
 class ChannelElementItem:
+    feed_name: str
     el: Any
+    image_urls: List[str]
+    images: List[Any]
diff --git a/repub/pipelines.py b/repub/pipelines.py
index 9b9d0f2..ccfa57e 100644
--- a/repub/pipelines.py
+++ b/repub/pipelines.py
@@ -1,83 +1,44 @@
-# Define your item pipelines here
-#
-# Don't forget to add your pipeline to the ITEM_PIPELINES setting
-# See: https://docs.scrapy.org/en/latest/topics/item-pipeline.html
+from os import PathLike
+from pathlib import PurePosixPath
+from typing import IO, DefaultDict, Optional, Set, Union
+from urllib.parse import urlparse
+
+import repub.utils
+from repub.exporters import RssExporter
+from scrapy.pipelines.images import FilesPipeline as BaseFilesPipeline
+from scrapy.pipelines.images import ImagesPipeline as BaseImagesPipeline
 
 
-# useful for handling different item types with a single interface
-# from itemadapter import ItemAdapter
-import six
-from scrapy import signals
-from scrapy.exceptions import CloseSpider, NotConfigured
-from scrapy.utils.misc import load_object
+class ImagePipeline(BaseImagesPipeline):
+    def file_path(self, request, response=None, info=None, *, item=None):
+        return repub.utils.local_image_path(request.url)
 
-from .exporters import RssItemExporter
-from .items import RssItem
-from .signals import feed_channel_discovered
+    def thumb_path(self, request, thumb_id, response=None, info=None, *, item=None):
+        raise NotImplementedError()
 
 
-class RssExportPipeline(object):
-    def __init__(self):
-        self.files = {}
-        self.exporters = {}
-
-    @classmethod
-    def from_crawler(cls, crawler):
-        pipeline = cls()
-        crawler.signals.connect(pipeline.spider_closed, signals.spider_closed)
-        crawler.signals.connect(
-            pipeline.feed_channel_discovered, feed_channel_discovered
-        )
-        return pipeline
-
-    def feed_channel_discovered(self, spider, feed, channel):
-        try:
-            file = open(spider.settings.get("FEED_FILE"), "wb")
-        except TypeError:
-            raise NotConfigured("FEED_FILE parameter does not string or does not exist")
-        except (IOError, OSError) as e:
-            raise CloseSpider(
-                "Cannot open file {}: {}".format(
-                    spider.settings.get("FEED_FILE", None), e
-                )
-            )
-        self.files[spider] = file
-
-        item_cls = spider.settings.get(
-            "FEED_ITEM_CLASS", spider.settings.get("FEED_ITEM_CLS", RssItem)
-        )
-        if isinstance(item_cls, six.string_types):
-            item_cls = load_object(item_cls)
-
-        namespaces = spider.settings.get("FEED_NAMESPACES", {})
-
-        feed_exporter = spider.settings.get("FEED_EXPORTER", RssItemExporter)
-        if isinstance(feed_exporter, six.string_types):
-            feed_exporter = load_object(feed_exporter)
-        if not issubclass(feed_exporter, RssItemExporter):
-            raise TypeError(
-                "FEED_EXPORTER must be RssItemExporter or its subclass, not '{}'".format(
-                    feed_exporter
-                )
-            )
-        self.exporters[spider] = feed_exporter(
-            file,
-            channel,
-            namespaces=namespaces,
-            item_cls=item_cls,
-        )
-        self.exporters[spider].start_exporting()
-
-    def spider_closed(self, spider):
-        self.exporters[spider].finish_exporting()
-        file = self.files.pop(spider)
-        file.close()
-
-    def process_item(self, item, spider):
-        self.exporters[spider].export_item(item)
-        return item
+class FilePipeline(BaseFilesPipeline):
+    def file_path(self, request, response=None, info=None, *, item=None):
+        return repub.utils.local_file_path(request.url)
 
 
-class RepubPipeline:
-    def process_item(self, item, spider):
-        return item
+class AudioPipeline(BaseFilesPipeline):
+    def __init__(self, store_uri: Union[str, PathLike], **kwargs):
+        self.FILES_URLS_FIELD = "audio_urls"
+        self.FILES_RESULT_FIELD = "audios"
+        store_uri = kwargs["settings"]["AUDIO_STORE"]
+        super().__init__(store_uri, **kwargs)
+
+    def file_path(self, request, response=None, info=None, *, item=None):
+        return repub.utils.local_audio_path(request.url)
+
+
+class VideoPipeline(BaseFilesPipeline):
+    def __init__(self, store_uri: Union[str, PathLike], **kwargs):
+        self.FILES_URLS_FIELD = "video_urls"
+        self.FILES_RESULT_FIELD = "videos"
+        store_uri = kwargs["settings"]["VIDEO_STORE"]
+        super().__init__(store_uri, **kwargs)
+
+    def file_path(self, request, response=None, info=None, *, item=None):
+        return repub.utils.local_video_path(request.url)
diff --git a/repub/postprocessing.py b/repub/postprocessing.py
index 8b8b3c1..e69de29 100644
--- a/repub/postprocessing.py
+++ b/repub/postprocessing.py
@@ -1,11 +0,0 @@
-class SortRssItems:
-    def __init__(self, file, feed_options):
-        self.file = file
-        self.feed_options = feed_options
-        self.buffer = ""
-
-    def write(self, data):
-        self.buffer += data.decode("utf-8")
-
-    def close(self):
-        self.file.write(sorted)
diff --git a/repub/rss.py b/repub/rss.py
index 0e0af5c..0a6ab18 100644
--- a/repub/rss.py
+++ b/repub/rss.py
@@ -78,7 +78,7 @@ def sort_rss(root):
 
 
 def serialize(root):
-    root = sort_rss(root)
+    # root = sort_rss(root)
     return etree.tostring(
         root, encoding="utf-8", xml_declaration=True, pretty_print=True
     )
diff --git a/repub/settings.py b/repub/settings.py
index b6e3f5e..076ed7e 100644
--- a/repub/settings.py
+++ b/repub/settings.py
@@ -93,4 +93,9 @@ FEED_EXPORTERS = {
     "rss": "repub.exporters.RssExporter",
 }
 
-LOG_LEVEL = "ERROR"
+TELNETCONSOLE_ENABLED = False
+
+LOG_LEVEL = "INFO"
+# LOG_LEVEL = "ERROR"
+
+MEDIA_ALLOW_REDIRECTS = True
diff --git a/repub/spiders/rss_spider.py b/repub/spiders/rss_spider.py
index 00ffd83..ab4b7b9 100644
--- a/repub/spiders/rss_spider.py
+++ b/repub/spiders/rss_spider.py
@@ -3,6 +3,8 @@ import logging
 import feedparser
 from repub.items import ChannelElementItem, ElementItem
 from repub.rss import CDATA, CONTENT, ITUNES, MEDIA, E, normalize_date
+from repub.utils import FileType, determine_file_type, local_file_path, local_image_path
+from scrapy.crawler import Crawler
 from scrapy.spiders import Spider
 from scrapy.utils.spider import iterate_spider_output
 
@@ -13,6 +15,34 @@ class BaseRssFeedSpider(Spider):
     from RSS feeds.
     """
 
+    def __init__(self, feed_name, **kwargs):
+        super().__init__(**kwargs)
+        self.feed_name = feed_name
+
+    def _set_crawler(self, crawler: Crawler) -> None:
+        super()._set_crawler(crawler)
+        for s in [
+            "REPUBLISHER_IMAGE_DIR",
+            "REPUBLISHER_FILE_DIR",
+            "REPUBLISHER_AUDIO_DIR",
+            "REPUBLISHER_VIDEO_DIR",
+        ]:
+            if self.settings.get(s) is None:
+                raise RuntimeError(f"Missing setting: {s}")
+
+    def rewrite_file_url(self, file_type: FileType, url):
+        file_dir = self.settings["REPUBLISHER_FILE_DIR"]
+        if file_type == FileType.IMAGE:
+            file_dir = self.settings["REPUBLISHER_IMAGE_DIR"]
+        elif file_type == FileType.VIDEO:
+            file_dir = self.settings["REPUBLISHER_VIDEO_DIR"]
+        elif file_type == FileType.AUDIO:
+            file_dir = self.settings["REPUBLISHER_AUDIO_DIR"]
+        return f"/{file_dir}/{local_file_path(url)}"
+
+    def rewrite_image_url(self, url):
+        return self.rewrite_file_url(FileType.IMAGE, url)
+
     def parse_feed(self, feed_text):
         parsed = feedparser.parse(feed_text, sanitize_html=False)
         if parsed.bozo:
@@ -48,25 +78,30 @@ class BaseRssFeedSpider(Spider):
         for tag in f.get("tags", []):
             channel.append(E.category(tag.term))
 
+        image_urls = []
         if "image" in f:
             if "href" in f.image:
                 image = E.image(
                     E.title(f.get("title")),
                     E.link(f.get("link")),
-                    E.url(f.image.get("href")),
+                    E.url(self.rewrite_image_url(f.image.get("href"))),
                     E.description(f.get("description")),
                 )
+                image_urls.append(f.image.get("href"))
             else:
                 image = E.image(
                     E.title(f.image.get("title")),
                     E.link(f.image.get("link")),
-                    E.url(f.image.get("url")),
+                    E.url(self.rewrite_image_url(f.image.get("url"))),
                     E.description(f.image.get("description")),
                     E.width(f.image.get("width")),
                     E.height(f.image.get("height")),
                 )
+                image_urls.append(f.image.get("url"))
             channel.append(image)
-        return ChannelElementItem(el=channel)
+        return ChannelElementItem(
+            feed_name=self.feed_name, el=channel, image_urls=image_urls, images=[]
+        )
 
     def _parse(self, response, **kwargs):
         response = self.adapt_response(response)
@@ -113,6 +148,21 @@ class RssFeedSpider(BaseRssFeedSpider):
         super().__init__(**kwargs)
 
     def parse_entry(self, response, feed, entry):
+        image_urls = []
+        file_urls = []
+        audio_urls = []
+        video_urls = []
+
+        def add_url(file_type, url):
+            if file_type == FileType.IMAGE:
+                image_urls.append(url)
+            elif file_type == FileType.AUDIO:
+                audio_urls.append(url)
+            elif file_type == FileType.VIDEO:
+                video_urls.append(url)
+            elif file_type == FileType.FILE:
+                file_urls.append(url)
+
         item = E.item(
             E.title(entry.get("title")),
             E.link(entry.get("link")),
@@ -125,15 +175,29 @@ class RssFeedSpider(BaseRssFeedSpider):
             E.author(entry.get("author")),
             ITUNES.summary(entry.get("summary")),
             ITUNES.duration(entry.get("itunes_duration")),
+            ITUNES.image(
+                None,
+                (
+                    {"href": self.rewrite_image_url(entry.get("image").href)}
+                    if "image" in entry
+                    else None
+                ),
+            ),
         )
+        if entry.get("image"):
+            image_urls.append(entry.get("image").href)
         for enc in entry.enclosures:
+            file_type = determine_file_type(
+                url=enc.get("href"), mimetype=enc.get("type")
+            )
             item.append(
                 E.enclosure(
-                    E.url(enc.get("href")),
+                    E.url(self.rewrite_file_url(file_type, enc.get("href"))),
                     E.length(enc.get("length")),
                     E.type(enc.get("type")),
                 )
             )
+            add_url(file_type, enc.get("href"))
 
         if "content" in entry:
             for c in entry.content:
@@ -144,9 +208,14 @@ class RssFeedSpider(BaseRssFeedSpider):
             for media in (
                 media for media in entry["media_content"] if media.get("url")
             ):
+                file_type = determine_file_type(
+                    url=media.get("url"),
+                    medium=media.get("medium"),
+                    mimetype=media.get("type"),
+                )
                 item.append(
                     MEDIA.content(
-                        E.url(media.get("url")),
+                        E.url(self.rewrite_file_url(file_type, media.get("url"))),
                         E.type(media.get("type")),
                         E.medium(media.get("medium")),
                         E.isDefault(media.get("isDefault")),
@@ -161,4 +230,16 @@ class RssFeedSpider(BaseRssFeedSpider):
                         E.lang(media.get("lang")),
                     )
                 )
-        return ElementItem(el=item)
+                add_url(file_type, media.get("url"))
+        return ElementItem(
+            feed_name=self.feed_name,
+            el=item,
+            images=[],
+            image_urls=image_urls,
+            files=[],
+            file_urls=file_urls,
+            audio_urls=audio_urls,
+            audios=[],
+            video_urls=video_urls,
+            videos=[],
+        )
diff --git a/repub/utils.py b/repub/utils.py
new file mode 100644
index 0000000..6c827c7
--- /dev/null
+++ b/repub/utils.py
@@ -0,0 +1,74 @@
+import hashlib
+import mimetypes
+from enum import Enum
+from pathlib import Path
+from typing import Any, List, Optional
+
+from scrapy.utils.python import to_bytes
+
+
+class FileType(Enum):
+    """File types that the republisher can handle"""
+
+    VIDEO = "video"
+    IMAGE = "image"
+    AUDIO = "audio"
+    FILE = "file"
+
+
+def local_image_path(name: str) -> str:
+    image_guid = hashlib.sha1(to_bytes(name)).hexdigest()  # nosec
+    return f"full/{image_guid}.jpg"
+
+
+def local_file_path(s: str) -> str:
+    media_guid = hashlib.sha1(to_bytes(s)).hexdigest()  # nosec
+    media_ext = Path(s).suffix
+    # Handles empty and wild extensions by trying to guess the
+    # mime type then extension or default to empty string otherwise
+    if media_ext not in mimetypes.types_map:
+        media_ext = ""
+        media_type = mimetypes.guess_type(s)[0]
+        if media_type:
+            media_ext = mimetypes.guess_extension(media_type)
+    return f"{media_guid}{media_ext}"
+
+
+def local_video_path(s: str) -> str:
+    return local_file_path(s)
+
+
+def local_audio_path(s: str) -> str:
+    return local_file_path(s)
+
+
+def determine_file_type(
+    url: str, medium: Optional[str] = None, mimetype: Optional[str] = None
+):
+    """
+    Uses all available information to determine the type of a file from a path/url
+    """
+    if medium:
+        if medium == "video":
+            return FileType.VIDEO
+        if medium == "audio":
+            return FileType.AUDIO
+        if medium == "image":
+            return FileType.IMAGE
+        if medium == "document":
+            return FileType.FILE
+        if medium == "executable":
+            return FileType.FILE
+
+    if not mimetype:
+        mimetype = mimetypes.guess_type(url)[0]
+
+    if mimetype:
+        if mimetype.startswith("image"):
+            return FileType.IMAGE
+        if mimetype.startswith("audio"):
+            return FileType.AUDIO
+        if mimetype.startswith("video"):
+            return FileType.VIDEO
+
+    return FileType.FILE