Initial commit...

LICENSE

@@ -0,0 +1,675 @@
+                    GNU GENERAL PUBLIC LICENSE
+                       Version 3, 29 June 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 General Public License is a free, copyleft license for
+software and other kinds of works.
+
+  The licenses for most software and other practical works are designed
+to take away your freedom to share and change the works.  By contrast,
+the GNU General Public License is 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.  We, the Free Software Foundation, use the
+GNU General Public License for most of our software; it applies also to
+any other work released this way by its authors.  You can apply it to
+your programs, too.
+
+  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.
+
+  To protect your rights, we need to prevent others from denying you
+these rights or asking you to surrender the rights.  Therefore, you have
+certain responsibilities if you distribute copies of the software, or if
+you modify it: responsibilities to respect the freedom of others.
+
+  For example, if you distribute copies of such a program, whether
+gratis or for a fee, you must pass on to the recipients the same
+freedoms that you received.  You must make sure that they, too, receive
+or can get the source code.  And you must show them these terms so they
+know their rights.
+
+  Developers that use the GNU GPL protect your rights with two steps:
+(1) assert copyright on the software, and (2) offer you this License
+giving you legal permission to copy, distribute and/or modify it.
+
+  For the developers' and authors' protection, the GPL clearly explains
+that there is no warranty for this free software.  For both users' and
+authors' sake, the GPL requires that modified versions be marked as
+changed, so that their problems will not be attributed erroneously to
+authors of previous versions.
+
+  Some devices are designed to deny users access to install or run
+modified versions of the software inside them, although the manufacturer
+can do so.  This is fundamentally incompatible with the aim of
+protecting users' freedom to change the software.  The systematic
+pattern of such abuse occurs in the area of products for individuals to
+use, which is precisely where it is most unacceptable.  Therefore, we
+have designed this version of the GPL to prohibit the practice for those
+products.  If such problems arise substantially in other domains, we
+stand ready to extend this provision to those domains in future versions
+of the GPL, as needed to protect the freedom of users.
+
+  Finally, every program is threatened constantly by software patents.
+States should not allow patents to restrict development and use of
+software on general-purpose computers, but in those that do, we wish to
+avoid the special danger that patents applied to a free program could
+make it effectively proprietary.  To prevent this, the GPL assures that
+patents cannot be used to render the program non-free.
+
+  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 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. Use with the GNU Affero General Public License.
+
+  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 Affero 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 special requirements of the GNU Affero General Public License,
+section 13, concerning interaction through a network will apply to the
+combination as such.
+
+  14. Revised Versions of this License.
+
+  The Free Software Foundation may publish revised and/or new versions of
+the GNU 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 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 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 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 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 General Public License for more details.
+
+    You should have received a copy of the GNU 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 the program does terminal interaction, make it output a short
+notice like this when it starts in an interactive mode:
+
+    <program>  Copyright (C) <year>  <name of author>
+    This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
+    This is free software, and you are welcome to redistribute it
+    under certain conditions; type `show c' for details.
+
+The hypothetical commands `show w' and `show c' should show the appropriate
+parts of the General Public License.  Of course, your program's commands
+might be different; for a GUI interface, you would use an "about box".
+
+  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 GPL, see
+<https://www.gnu.org/licenses/>.
+
+  The GNU General Public License does not permit incorporating your program
+into proprietary programs.  If your program is a subroutine library, you
+may consider it more useful to permit linking proprietary applications with
+the library.  If this is what you want to do, use the GNU Lesser General
+Public License instead of this License.  But first, please read
+<https://www.gnu.org/licenses/why-not-lgpl.html>.
+

README.md

@@ -0,0 +1,7 @@
+## WyOJ Musume
+
+这是 WyOJ 机器人的源代码。
+
+写的时候比较随意，有很多本来应该更标准的东西没有改（比如 QQ 群号这种按说应该放配置文件的东西）。
+
+

musume.py

@@ -0,0 +1,622 @@
+import asyncio
+import time
+import websockets
+import aiohttp
+import traceback
+import json
+import random
+import base64
+import aiosqlite
+import re
+import os
+
+wsserver = 'ws://172.17.0.2:3001/'
+ws = None
+commands = dict ()
+trusted_senders = [ 2681243014 ]
+confirm_queue = dict ()
+private_queue = dict ()
+sqlconn = None
+GROUP_ID = 1061173220
+
+def wyoj_enable (qq, name):
+    if re.match (r'^([A-Za-z0-9_]*)$', name) is None:
+        raise Exception ('wyoj_enable: Invalid username; possible injection')
+    os.system (f"sudo docker exec uoj-db mysql -proot app_uoj233 -e \"update user_info set usergroup = 'U', qq = '{qq}' where username = '{name}'\"")
+
+def wyoj_disable (name):
+    if re.match (r'^([A-Za-z0-9_]*)$', name) is None:
+        raise Exception ('wyoj_disable: Invalid username; possible injection')
+    os.system (f"sudo docker exec uoj-db mysql -proot app_uoj233 -e \"update user_info set usergroup = 'B' where username = '{name}'\"")
+
+def wyoj_adminize (name):
+    if re.match (r'^([A-Za-z0-9_]*)$', name) is None:
+        raise Exception ('wyoj_adminize: Invalid username; possible injection')
+    os.system (f"sudo docker exec uoj-db mysql -proot app_uoj233 -e \"update user_info set usergroup = 'S' where username = '{name}'\"")
+
+# 暂时不考虑嵌套。
+def wyoj_deadminize (name):
+    if re.match (r'^([A-Za-z0-9_]*)$', name) is None:
+        raise Exception ('wyoj_deadminize: Invalid username; possible injection')
+    os.system (f"sudo docker exec uoj-db mysql -proot app_uoj233 -e \"update user_info set usergroup = 'U' where username = '{name}'\"")
+
+def wyoj_admins ():
+    return os.popen ("sudo docker exec uoj-db mysql -proot app_uoj233 -e \"select username from user_info where usergroup = 'S';\"").read ()
+
+def wyoj_banned ():
+    return os.popen ("sudo docker exec uoj-db mysql -proot app_uoj233 -e \"select username from user_info where usergroup = 'B';\"").read ()
+
+async def db_insert_bind (uid, name):
+    cursor = await sqlconn.cursor ()
+    await cursor.execute (f'insert into binds (qq, name) values (\'{uid}\', \'{name}\')');
+    await sqlconn.commit ()
+    await cursor.close ()
+
+async def db_delete_bind (name):
+    cursor = await sqlconn.cursor ()
+    await cursor.execute (f'delete from binds where name = \'{name}\'');
+    await sqlconn.commit ()
+    await cursor.close ()
+
+async def db_query_by_id (uid):
+    cursor = await sqlconn.cursor ()
+    await cursor.execute (f'select qq, name from binds where qq = \'{uid}\'')
+    res = await cursor.fetchall ()
+    await cursor.close ()
+    return res
+
+async def db_query_by_name (name):
+    cursor = await sqlconn.cursor ()
+    await cursor.execute (f'select qq, name from binds where name = \'{name}\'')
+    res = await cursor.fetchall ()
+    await cursor.close ()
+    if len (res) > 1:
+        raise Exception ('重复绑定')
+    if len (res) == 1:
+        return res[0]
+    return None
+
+async def db_query_binds ():
+    cursor = await sqlconn.cursor ()
+    await cursor.execute (f'select qq, name from binds order by qq')
+    res = await cursor.fetchall ()
+    await cursor.close ()
+    return res
+
+async def db_count_bound (qq):
+    cursor = await sqlconn.cursor ()
+    await cursor.execute (f'select count (*) from binds where qq = \'{qq}\'')
+    res = await cursor.fetchone ()
+    await cursor.close ()
+    return res[0]
+
+async def db_check_bound (name):
+    cursor = await sqlconn.cursor ()
+    await cursor.execute (f'select count (*) from binds where name = \'{name}\'')
+    res = await cursor.fetchone ()
+    await cursor.close ()
+    return res[0] > 0
+
+async def db_banned (qq):
+    cursor = await sqlconn.cursor ()
+    await cursor.execute (f'select count (*) from bans where qq = \'{qq}\'')
+    res = await cursor.fetchone ()
+    await cursor.close ()
+    return res[0] > 0
+
+async def db_banned_all ():
+    cursor = await sqlconn.cursor ()
+    await cursor.execute (f'select qq from bans')
+    res = await cursor.fetchall ()
+    await cursor.close ()
+    return res
+
+async def db_ban (qq):
+    cursor = await sqlconn.cursor ()
+    await cursor.execute (f'insert into bans (qq) values (\'{qq}\')');
+    await sqlconn.commit ()
+    await cursor.close ()
+
+async def db_unban (qq):
+    cursor = await sqlconn.cursor ()
+    await cursor.execute (f'delete from bans where qq = \'{qq}\'');
+    await sqlconn.commit ()
+    await cursor.close ()
+
+refpatt = re.compile (r'\[CQ:reply,id=([0-9]*)\]')
+atpatt = re.compile (r'\[CQ:at,qq=([0-9]*)\]')
+class MessageMeta:
+    def __init__ (self, data):
+        s = data['raw_message']
+        self.data = data
+        self.uid = data['user_id']
+        self.msgtype = data['message_type']
+        self.msgid = data['message_id']
+        self.refs = re.findall (refpatt, s)
+        self.ats = re.findall (atpatt, s)
+        if self.msgtype != 'private':
+            self.gid = data['group_id']
+        i = 0
+        flag = False
+        while i < len (s) and (flag or s[i] == '['):
+            flag |= s[i] == '['
+            flag &= s[i] != ']'
+            i += 1
+        while i < len (s) and s[i] == ' ':
+            i += 1
+        self.msg = s[i:]
+        self.cmd = self.msg.split ()
+
+async def reply_msg (meta, msg):
+    return await ws.send (json.dumps ({
+        'action': 'send_group_msg',
+        'params': {
+            'group_id': meta.gid,
+            'message': [ { 'type': 'reply', 'data': { 'id': meta.msgid } },
+                        { 'type': 'text', 'data': { 'text': msg } } ]}}))
+
+async def reply_private_msg (meta, msg):
+    return await ws.send (json.dumps ({
+        'action': 'send_private_msg',
+        'params': {
+            'user_id': meta.uid,
+            'message': [ { 'type': 'reply', 'data': { 'id': meta.msgid } },
+                        { 'type': 'text', 'data': { 'text': msg } } ]}}))
+
+
+def download_dir (s):
+    return f'./download/{s}'
+
+FILE_KEEP_MIN = 60
+REPOTER_GAP = 5
+CHUNK_SIZE = 1048576 * 16
+
+async def receive_file (meta, data):
+    fileid = data['message'][0]['data']['file_id']
+    await ws.send (json.dumps ({
+            'action': 'get_file',
+            'params': { 'file_id': fileid }}))
+
+    size = int (data['message'][0]['data']['file_size'])
+    url = data['message'][0]['data']['url']
+    name = data['message'][0]['data']['file']
+    if not name.endswith ('.zip'):
+        return await reply_msg (meta, f'识别到非 ZIP 格式文件，未下载')
+    await reply_msg (meta, f'识别到 ZIP 格式文件，大小 %.3lf MB 正在下载' % (size / 1048576))
+
+    start_time = time.time ()
+    rx = 0
+    finished = False
+
+    async def reporter ():
+        while not finished:
+            duration = time.time () - start_time
+            if rx != 0:
+                await reply_msg (meta, f'已下载 %.3lf MB = %.3lf MB/s = %.3lf Mbps, ETA %.2lf 秒'
+                             % (rx / 1048576, rx / 1048576 / duration, rx * 8 / 1048576 / duration, duration / rx * size))
+            await asyncio.sleep (REPOTER_GAP)
+
+    asyncio.create_task (reporter ())
+
+    async with aiohttp.ClientSession () as sess:
+        async with sess.get (url) as resp:
+            if resp.status != 200:
+                await reply_msg (meta, f'请求 {url} 失败。HTTP 状态码 {resp.status}')
+            filename = download_dir (str (meta.msgid))
+            with open (filename, 'wb') as f:
+                async for chunk in resp.content.iter_chunked (CHUNK_SIZE):
+                    f.write (chunk)
+                    rx += len (chunk)
+            duration = time.time () - start_time
+            finished = True
+            await reply_msg (meta, f'已成功下存到 {filename}，耗时 %.3lf 秒，合 %.3lf MB/s = %.3lf Mbps\n将在 {FILE_KEEP_MIN} 分钟后删除。'
+                             % (duration, size / duration / 1048576, size * 8 / 1048576 / duration))
+            await asyncio.sleep (FILE_KEEP_MIN * 60)
+            await reply_msg (meta, f'到时，删除文件 {filename}')
+            os.system (f'rm {download_dir (filename)}')
+
+def random_token ():
+    s = ''
+    for i in range (16):
+        s += random.choice ('abcdefghijklmnopqrstuvwxyz')
+    return s
+def gen_confirm_token (meta):
+    while True:
+        s = str (meta.uid) + random_token ()
+        s = base64.b64encode (s.encode ('utf-8')).decode ('utf-8')
+        if s not in confirm_queue:
+            return s
+
+CONFIRM_TIMEOUT = 60
+async def confirm (meta, msg):
+    token = gen_confirm_token (meta)
+    future = asyncio.Future ()
+    confirm_queue[token] = future
+    await reply_msg (meta, f'{msg}\n{CONFIRM_TIMEOUT} 秒内 /confirm {token} 来确认')
+    try:
+        result = await asyncio.wait_for (future, timeout=CONFIRM_TIMEOUT)
+    except asyncio.TimeoutError:
+        await reply_msg (meta, f'超时，取消操作')
+        result = False
+    else:
+        await reply_msg (meta, f'成功确认')
+    finally:
+        del confirm_queue[token]
+    return result
+
+def register_cmd (cmd):    
+    def decorator (fn):
+        if cmd in commands:
+            raise Exception(f'试图第二次注册命令 {cmd}')
+        commands[cmd] = fn
+        def wrapper (*args, **kwargs):
+            return fn (*args, **kwargs)
+        return wrapper
+    return decorator
+
+def trusted_sender (fn):
+    async def wrapper (*args, **kwargs):
+        meta = args[0]
+        if meta.uid in trusted_senders:
+            return await fn (*args, **kwargs)
+        return await reply_msg (args[0], f'执行该命令的权限不足')
+    return wrapper
+
+@register_cmd ('/confirm')
+async def cmd_confirm (meta, arg):
+    if len (arg) != 2:
+        return await reply_msg (meta, f'需要令牌')
+    token = arg[1]
+    if token not in confirm_queue:
+        return await reply_msg (meta, f'无效令牌')
+    uid = base64.b64decode (token).decode ('utf-8')[:-16]
+    if uid != str (meta.uid):
+        return await reply_msg (meta, f'错误的确认者。期望 {uid}，得到 {meta.uid}')
+    confirm_queue[token].set_result (True)
+
+@register_cmd ('/ping')
+async def cmd_ping (meta, arg):
+    s = f'PONG {meta.uid}'
+    if meta.uid in trusted_senders:
+        s += ' (privileged)'
+    if await db_banned (meta.uid):
+        s += ' (banned)'
+    await reply_msg (meta, s)
+
+MAX_BINDS = 3
+@register_cmd ('/bind')
+async def cmd_bind (meta, arg):
+    if len (arg) != 2:
+        return await reply_msg (meta, f'需要 WyOJ 用户名\nUsage: /bind username')
+    name = arg[1]
+    if re.match (r'^([A-Za-z0-9_]*)$', name) is None:
+        return await reply_msg (meta, '不合法用户名')
+    if not await confirm (meta, f'确认将 {meta.uid} 绑定到 {name} 吗？'):
+        return
+    if await db_check_bound (name):
+        qq, _ = await db_query_by_name (name)
+        return await reply_msg (meta, f'无法绑定 {name}；已绑定到 {qq}')
+    if await db_count_bound (meta.uid) >= MAX_BINDS:
+        return await reply_msg (meta, f'无法绑定更多账号。单个 QQ 绑定最大值为 {MAX_BINDS}')
+    await db_insert_bind (meta.uid, name)
+    wyoj_enable (meta.uid, name)
+    await reply_msg (meta, f'成功将 {name} 绑定到 {meta.uid}')
+
+@register_cmd ('/rebind')
+@trusted_sender
+async def cmd_rebind (meta, arg):
+    if len (arg) != 2:
+        return await reply_msg (meta, f'需要 WyOJ 用户名\nUsage: /bind username')
+    name = arg[1]
+    if re.match (r'^([A-Za-z0-9_]*)$', name) is None:
+        return await reply_msg (meta, '不合法用户名')
+    if not await db_check_bound (name):
+        return await reply_msg (meta, f'无绑定')
+    qq, _ = await db_query_by_name (name)
+    await db_delete_bind (name)
+    await db_insert_bind (qq, name)
+    wyoj_enable (qq, name)
+    await reply_msg (meta, f'已重新绑定')
+
+@register_cmd ('/refresh')
+@trusted_sender
+async def cmd_refresh (meta, arg):
+    q = await db_query_binds ()
+    s = ''
+    cnt = 0
+    for qq, name in q:
+        await db_delete_bind (name)
+        await db_insert_bind (qq, name)
+        wyoj_enable (qq, name)
+        s += f'{qq}\t\t{name}\n'
+        cnt += 1
+    await reply_msg (meta, f'已成功绑定：\n{s}\n计 {cnt} 人')
+
+@register_cmd ('/unbind')
+async def cmd_unbind (meta, arg):
+    if len (arg) != 2:
+        return await reply_msg (meta, f'需要 WyOJ 用户名\nUsage: /unbind username')
+    name = arg[1]
+    if re.match (r'^([A-Za-z0-9_]*)$', name) is None:
+        return await reply_msg (meta, '不合法用户名')
+    if not await db_check_bound (name):
+        return await reply_msg (meta, '该账号未绑定')
+    qq, _ = await db_query_by_name (name)
+    if qq != str (meta.uid):
+        if meta.uid in trusted_senders:
+            await reply_msg (meta, f'你是管理员 {meta.uid}，强制解绑，等待确认')
+        else:
+            return await reply_msg (meta, f'{name} 与 {qq} 的绑定无法由你 ({meta.uid}) 解绑')
+    if not await confirm (meta, f'确认将 {meta.uid} 从 {name} 解绑吗？'):
+        return
+    if not await db_check_bound (name):
+        return await reply_msg (meta, f'尚无绑定，无法解绑')
+    await db_delete_bind (name)
+    wyoj_disable (name)
+    await reply_msg (meta, f'成功将 {meta.uid} 与 {name} 解绑')
+
+@register_cmd ('/adminize')
+@trusted_sender
+async def cmd_adminize (meta, arg):
+    if len (arg) not in [ 2, 3 ]:
+        return await reply_msg (meta, f'需要用户名及时间\nUsage: /adminize username [time-in-minutes]')
+    name = arg[1]
+    if re.match (r'^([A-Za-z0-9_]*)$', name) is None:
+        return await reply_msg (meta, '不合法用户名')
+    time = -1
+    if len (arg) == 3:
+        try:
+            time = int (arg[2])
+        except ValueError:
+            return await reply_msg (meta, f'不合法的时间 {arg[2]}')
+    if not await confirm (meta, f'确定要赋予 {name} 以 {time} 分钟的管理员权限吗？'):
+        return
+    wyoj_adminize (name)
+    await reply_msg (meta, f'{name} 已被赋予管理员权限')
+    if time > 0:
+        await asyncio.sleep (time * 60)
+        wyoj_deadminize (name)
+        await reply_msg (meta, f'{name} 的管理员权限已到期')
+
+@register_cmd ('/deadminize')
+@trusted_sender
+async def cmd_deadminize (meta, arg):
+    if len (arg) not in [ 2, 3 ]:
+        return await reply_msg (meta, f'需要用户名\nUsage: /deadminize username')
+    name = arg[1]
+    if re.match (r'^([A-Za-z0-9_]*)$', name) is None:
+        return await reply_msg (meta, '不合法用户名')
+    if not await confirm (meta, f'确定要取消 {name} 的管理员权限吗？'):
+        return
+    wyoj_deadminize (name)
+    await reply_msg (meta, f'{name} 已被赋予管理员权限')
+
+async def cmd_query_qq (meta, arg):
+    qq = arg[2]
+    try:
+        int (qq)
+    except ValueError:
+        await reply_msg (meta, f'无效 QQ 号 {qq}')
+    res = await db_query_by_id (qq)
+    await reply_msg (meta, f'QQ {qq} 绑定到 {len (res)} 个账号：{", ".join (map (lambda x: x[1], res))}')
+
+async def cmd_query_me (meta, arg):
+    arg.append ('qq')
+    arg.append (str (meta.uid))
+    await cmd_query_qq (meta, arg)
+
+async def cmd_query_name (meta, arg):
+    name = arg[2]
+    if re.match (r'^([A-Za-z0-9_]*)$', name) is None:
+        return await reply_msg (meta, '不合法用户名')
+    res = await db_query_by_name (name)
+    if not res:
+        await reply_msg (meta, f'{name} 未绑定')
+    else:
+        await reply_msg (meta, f'{name} 绑定到 {res[0]}')
+
+@trusted_sender
+async def cmd_query_all (meta, arg):
+    await reply_msg (meta, f'绑定表：\n{"\n".join (map (lambda x: x[0] + "\t\t" + x[1], await db_query_binds ()))}')
+
+@trusted_sender
+async def cmd_query_banned (meta, arg):
+    await reply_msg (meta, wyoj_banned ())
+
+@trusted_sender
+async def cmd_query_admins (meta, arg):
+    await reply_msg (meta, wyoj_admins ())
+
+@register_cmd ('/query')
+async def cmd_query (meta, arg):
+    if len (arg) == 1:
+        return await cmd_query_me (meta, arg)
+    elif len (arg) == 2:
+        if arg[1] == 'all':
+            return await cmd_query_all (meta, arg)
+        elif arg[1] == 'banned':
+            return await cmd_query_banned (meta, arg)
+        elif arg[1] == 'admins':
+            return await cmd_query_admins (meta, arg)
+    elif len (arg) == 3:
+        if arg[1] == 'qq':
+            return await cmd_query_qq (meta, arg)
+        elif arg[1] == 'name':
+            return await cmd_query_name (meta, arg)
+    await reply_msg (meta, '期望零个或两个参数\nUsage: /query || /query qq qqid || /query name username')
+
+@register_cmd ('/ban')
+@trusted_sender
+async def cmd_ban (meta, arg):
+    if len (arg) != 2:
+        return await reply_msg (meta, f'需要一个参数\nUsage: /ban username')
+    qq = arg[1]
+    try:
+        int (qq)
+    except ValueError:
+        return await reply_msg (meta, f'无效 QQ 号 {qq}')
+    if not await confirm (meta, f'确定要封禁 {qq} 及其名下的所有账号吗？'):
+        return
+    await db_ban (qq)
+    res = await db_query_by_id (qq)
+    for _, name in res:
+        wyoj_disable (name)
+    await reply_msg (meta, f'被封禁的用户：{", ".join (map (lambda x: x[1], res))}')
+
+@register_cmd ('/unban')
+@trusted_sender
+async def cmd_unban (meta, arg):
+    if len (arg) != 2:
+        return await reply_msg (meta, f'需要一个参数\nUsage: /unban username')
+    try:
+        qq = str (int (arg[1]))
+    except ValueError:
+        return await reply_msg (meta, f'无效 QQ 号 {qq}')
+    if not await confirm (meta, f'确定要解封 {qq} 吗（不解封账号）？'):
+        return
+    await db_unban (qq)
+    await reply_msg (meta, '成功解封')
+
+@register_cmd ('/banlist')
+async def cmd_banlist (meta, arg):
+    await reply_msg (meta, f'被封禁的 QQ：{", ".join (map (lambda x: x[0], await db_banned_all ()))}')
+
+@register_cmd ('/entrust')
+@trusted_sender
+async def cmd_entrust (meta, arg):
+    global trusted_senders
+    if len (meta.ats) == 0:
+        await reply_msg (meta, f'需要 At 某人\nUsage: [@someone..] /entrust [@someone..]')
+    if not await confirm (meta, f'确定信任 {' '.join (meta.ats)} 吗？'):
+        return
+    for i in meta.ats:
+        try:
+            int (i)
+        except ValueError:
+            return await reply_msg (meta, f'非法 At')
+    trusted_senders += map (int, meta.ats)
+    await reply_msg (meta, f'成功信任')
+
+@register_cmd ('/detrust')
+@trusted_sender
+async def cmd_detrust (meta, arg):
+    global trusted_senders
+    if len (meta.ats) == 0:
+        await reply_msg (meta, f'需要 At 某人\nUsage: [@someone..] /entrust [@someone..]')
+    if not await confirm (meta, f'确定取消信任 {' '.join (meta.ats)} 吗？'):
+        return
+    for i in meta.ats:
+        try:
+            int (i)
+        except ValueError:
+            return await reply_msg (meta, f'非法 At')
+        if int (i) not in trusted_senders:
+            await reply_msg (meta, '其实 {i} 并未被信任。')
+    for i in meta.ats:
+        trusted_senders.remove (int (i))
+    await reply_msg (meta, f'成功取消信任')
+
+@register_cmd ('/trusts')
+async def cmd_trusts (meta, arg):
+    await reply_msg (meta, f'信任用户：{' '.join (map (str, trusted_senders))}')
+
+
+async def run_cmd (cmd):
+    proc = await asyncio.create_subprocess_shell (
+            cmd,
+            stdout=asyncio.subprocess.PIPE,
+            stderr=asyncio.subprocess.PIPE)
+    stdout, stderr = await proc.communicate ()
+    return stdout.decode ('utf-8'), stderr.decode ('utf-8')
+
+@register_cmd ('/upload')
+@trusted_sender
+async def cmd_upload (meta, arg):
+    pid = arg[1]
+    try:
+        pid = int (pid)
+    except ValueError:
+        return await reply_msg (meta, f'非法题号')
+    if len (meta.refs) != 1:
+        return await reply_msg (meta, f'需要有且仅有一个指向题目数据压缩包的引用')
+    if not os.path.exists (download_dir (meta.refs[0])):
+        return await reply_msg (meta, f'数据文件未被下载：错误的引用或者已经超时')
+    await reply_msg (meta, f'正在上传数据')
+    stdout, stderr = await run_cmd (f'/home/ryp/upload {pid} {download_dir (meta.refs[0])}')
+    await reply_msg (meta, f'命令执行完毕。标准输出：\n{stdout}\n\n标准错误：{stderr}\n' \
+            f'若无错误，请打开 https://oj.ryp.org.cn/problem/{pid}/manage/data 点击校验配置并同步数据')
+
+async def dispatch (meta):
+    if not meta.cmd[0] in commands:
+        return await reply_msg (meta, f'未知命令 {meta.cmd[0]}')
+    await commands[meta.cmd[0]] (meta, meta.cmd)
+
+PRIVATE_TIMEOUT = 60 * 15
+async def await_private_msg (qq):
+    if qq in private_queue.keys ():
+        raise Exception ('重复期望一条私聊消息')
+    future = asyncio.Future ()
+    private_queue[qq] = future
+    try:
+        res = await asyncio.wait_for (future, timeout=PRIVATE_TIMEOUT)
+    except asyncio.TimeoutError:
+        await reply_msg (meta, f'十五分钟未回复。本次操作取消')
+        res = False
+    finally:
+        del private_queue[qq]
+    return res
+
+async def begin_private (meta):
+    qq = meta.uid
+    await reply_private_msg (meta, '请把题目数据发给我（内含 problem.conf 的 ZIP 存档）')
+    data_msg = await await_private_msg (qq)
+    if data_msg.data['message'][0]['type'] != 'file':
+        return await reply_private_msg (data_msg, '你发的不是文件。本次对话结束')
+    await receive_file (data_msg, data_msg.data)
+    await reply_private_msg (meta, '收到了！')
+
+async def dispatch_private (meta):
+    qq = meta.uid
+    if len (await db_query_by_id (qq)) == 0:
+        return await reply_private_msg (meta, '你必须绑定后才能私聊我')
+    try:
+        private_queue[qq].set_result (meta)
+    except KeyError:
+        await begin_private (meta)
+
+async def handle_msg (data):
+    try:
+        print (data)
+        data = json.loads (data)
+        meta = MessageMeta (data)
+        if meta.msgtype == 'private':
+            print ('是私聊消息')
+            await dispatch_private (meta)
+            return
+        if meta.gid != GROUP_ID:
+            return
+        if data['message'][0]['type'] == 'file':
+            return await receive_file (meta, data)
+        if meta.msg[0] != '/':
+            return
+        print (f'收到群 {meta.gid} 的用户 {meta.uid} 的命令：{' '.join (meta.cmd)}')
+        await dispatch (meta)
+    except KeyError as e:
+        print (f'键错误：{e}')
+        traceback.print_exc ()
+    except Exception as e:
+        print (f'未知错误：{e}')
+        traceback.print_exc ()
+
+async def client_loop ():
+    global ws, sqlconn
+
+    ws = await websockets.connect (wsserver)
+    sqlconn = await aiosqlite.connect ('data.db')
+    print ('已成功连接到 NapCat 服务器')
+    async for msg in ws:
+        asyncio.create_task (handle_msg (msg))
+
+if __name__ == '__main__':
+    asyncio.run (client_loop ())
+